CLUTCHES & BRAKES

CONTENTS
ELECTROMAGNETIC CLUTCHES & BRAKES

250
 251
COUPLINGS

ETP BUSHINGS

ELECTROMAGNETIC
CLUTCHES & BRAKES

SPEED CHANGERS
& REDUCERS

INVERTERS

LINEAR SHAFT DRIVES

TORQUE LIMITERS

ROSTA

250 ELECTROMAGNETIC CLUTCHES & BRAKES 336 SPRING-ACTUATED BRAKES

252 Electromagnetic Clutch & Brake Models 338 Product Lineup

254 Selection Guide 342 BXW(L/H/S)

255 Select by Product Characteristics 344 BXW(R)

256 Applications 346 BXR(LE)

348 BXR
258 ELECTROMAGNETIC-ACTUATED MICRO 352 BXL
CLUTCHES & BRAKES 356 BXH
260 Product Lineup 360 BXL(N)
264 102 362 Selection Procedures
268 CYT

270 112 370 ELECTROMAGNETIC TOOTH CLUTCHES

372 546
272 ELECTROMAGNETIC-ACTUATED
CLUTCHES & BRAKES 376 BRAKE MOTORS
274 Product Lineup
378 BMS
278 101
380 BMM
280 CS

282 111
384 POWER SUPPLIES
284 CSZ
386 Product Lineup
285 BSZ
388 BES

390 BEH
286 ELECTROMAGNETIC CLUTCH AND BRAKE UNITS
392 BEW
288 Product Lineup
394 BEW(S)
294 125
396 BEW(W)
298 121(20G)
398 BEW(FH)
300 126
400 BEM
304 CBW
402 BEM(T)
308 CMW

310 121(10G)
607 MIKI PULLEY Hole-Drilling Standards
312 122

314 ELECTROMAGNETIC-ACTUATED CLUTCHES

& BRAKES TECHNICAL DOCUMENT

251
ELECTROMAGNETIC CLUTCHES & BRAKES

Electromagnetic Clutch & Brake Models

Series ELECTROMAGNETIC-ACTUATED MICRO CLUTCHES & BRAKES

Device Micro Clutches Micro Brakes

Models 102 CYT 112

13 33 33M 13

P.264 P.266 P.270

15 35 12
P.268

Type
33B
P.265 P.267 P.271

11 31 11

P.265 P.267 P.269 P.271

Series SPRING-ACTUATED BRAKES

BXW(L/H/S) BXR(LE) BXL BXL(N)

P.342 P.346 P.352 P.360

Models
BXW(R) BXR BXH

P.344 P.348 P.356

Series ELECTROMAGNETIC CLUTCH & BRAKE POWER SUPPLIES RECTIFIED POWER SUPPLIES FOR SPRING-ACTUATED BRAKES
DC45/90/180V
BES BEH BEW BEW(S)

Models

P.388 P.390 P.392 P.394

252
 253
COUPLINGS

ETP BUSHINGS

ELECTROMAGNETIC
CLUTCHES & BRAKES

SPEED CHANGERS
& REDUCERS

ELECTROMAGNETIC-ACTUATED CLUTCHES & BRAKES

INVERTERS

Clutches Brakes
LINEAR SHAFT DRIVES
101 CS CSZ 111 BSZ

13G 33G 35 13G 12 TORQUE LIMITERS

ROSTA

P.278 P.280 P.282

SERIES
15G 35G 12G

ELECTROMAGNETIC-ACTUATED CLUTCHES & BRAKES

ELECTROMAGNETIC-
ACTUATED MICRO
CLUTCHES & BRAKES
ELECTROMAGNETIC-
P.279 P.281 P.283 ACTUATED
CLUTCHES & BRAKES
11G 31G 11G ELECTROMAGNETIC
CLUTCH & BRAKE
UNITS

SPRING-ACTUATED
P.279 P.281 P.284 P.283 P.285 BRAKE

ELECTROMAGNETIC
TOOTH CLUTCHES

Series ELECTROMAGNETIC CLUTCH AND BRAKE UNITS Series ELECTROMAGNETIC BRAKE MOTORS BRAKE MOTORS
TOOTH CLUTCHES
Clutches & Brakes Double clutches & brakes 546 BMS·BMM
POWER SUPPLIES

P.294
Device Models
Double clutches

P.310 P.312 P.372 P.378

BEW(W) BEW(FH) BEM BEM(T)

P.396 P.398 P.400 P.402

253
A selection guide for electromagnetic clutches and brakes begins on
the next page.
ELECTROMAGNETIC CLUTCHES & BRAKES

Selection Guide

Miki Pulley divides its electromagnetic clutches & brakes into several major categories:
electromagnetic-actuated clutches & brakes, spring-actuated clutches & brakes,
electromagnetic tooth clutches, brake motors, and power supplies.

When selecting a product, have information handy on your application, required torque,
performance, load properties, drive source and the like, and then use the diagram on the
page at right as your guide. Selection details are described in the selection procedures given
for each series.

List of Products

MIKI PULLEY
ELECTROMAGNETIC-ACTUATED CLUTCHES & BRAKES
ELECTROMAGNETIC CLUTCHES & BRAKES

ELECTROMAGNETIC-ACTUATED MICRO CLUTCHES & BRAKES

ELECTROMAGNETIC-ACTUATED CLUTCHES & BRAKES

CLUTCH & BRAKE UNITS

SPRING-ACTUATED BRAKES

ELECTROMAGNETIC TOOTH CLUTCHES

BRAKE MOTORS

POWER SUPPLIES

254
 255
Select by Product Characteristics COUPLINGS

ETP BUSHINGS
Torque (N·m)
ELECTROMAGNETIC
Electromagnetic-actuated micro

CLUTCHES & BRAKES

102 [0.4-2.4 N·m]
Clutches SPEED CHANGERS
CYT [0.4-1.0 N·m] & REDUCERS

INVERTERS
Brakes 112 [0.4-2.4 N·m]
LINEAR SHAFT DRIVES
Electromagnetic-actuated

CSZ [2.4-10 N·m]

ELEC TROM AGNE TIC-AC TUATED CLUTCHES & BR AK ES

TORQUE LIMITERS
Clutches
101/CS [5-320 N·m]
ROSTA

BSZ [2.4-10 N·m]

Brakes SERIES
111 [5-320 N·m]

ELECTROMAGNETIC-ACTUATED CLUTCHES & BRAKES

ELECTROMAGNETIC-
ACTUATED MICRO
CLUTCHES & BRAKES
Drip-proof
125 [2.4-160 N·m] ELECTROMAGNETIC-
type
ACTUATED
CLUTCHES & BRAKES
Open-disc brake
121(20G) [5-320 N·m] ELECTROMAGNETIC
system type
CLUTCH & BRAKE
Clutc ＆

UNITS
Motor-coupled
126 [5-80 N·m]
type SPRING-ACTUATED
h

BRAKE
Brake Unit s

Speed reducer- CBW

integrated type [5-40 N·m] ELECTROMAGNETIC
TOOTH CLUTCHES
Motor/speed reducer- CMW
integrated type [5-40 N·m]
BRAKE MOTORS

Double-clutch 121(10G) [5-320 N·m]

units
POWER SUPPLIES

Double clutch
122 [5-160 N·m]
and brake units

BXW(R)[0.30-2.50 N·m] BXR [5-55 N·m]

SPRING -AC TUATED BR AK ES

Holding use BXW(S)[0.36-5.20 N·m]

BXR(LE)[0.06-3.20 N·m]

Holding and
BXW(H)[0.24-4.00 N·m] BXH [4-44 N·m]
braking use

BXW(L)[0.12-2.00 N·m] BXL [2-22 N·m]

Braking use
BXL(N)[2-80 N・m]

To o t h c l u t c h e s 546 [17.5-2200 N·m]

BRAKE MOTORS

Electromagnetic- BMM (2.5-50 N·m)

actuated Motor output 0.2 kW to 3.7 kW

Spring-actuated BMS (2-15 N·m)

Motor output 0.2 kW to 1.5 kW

255
ELECTROMAGNETIC CLUTCHES & BRAKES

Applications

Product model BXR

Employed device Articulated Robot

BXR spline type for holding arms.

Saves space with slim design and greatly reduces
drag wear by using light rotor.

Product model 111

Employed device Special-purpose

Vehicles

The Electromagnetic-
actuated brake 111 model
is used in the elevating
device for the auxiliary leg.

Product model BXR

Employed device Aerial Vehicle

BXR model as the holding brake for drive

motor. Slim design helps save space.

256
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COUPLINGS

ETP BUSHINGS

ELECTROMAGNETIC
CLUTCHES & BRAKES

SPEED CHANGERS
& REDUCERS

INVERTERS

LINEAR SHAFT DRIVES

TORQUE LIMITERS

ROSTA

SERIES

ELECTROMAGNETIC-ACTUATED CLUTCHES & BRAKES

Product model BXW Large Size (Custom Product) ELECTROMAGNETIC-
ACTUATED MICRO
CLUTCHES & BRAKES
Employed device Wind Turbine Generator
ELECTROMAGNETIC-
ACTUATED
Large BXW as the pitch drive device of a wind turbine CLUTCHES & BRAKES

ELECTROMAGNETIC
generator.
CLUTCH & BRAKE
UNITS

SPRING-ACTUATED
BRAKE

ELECTROMAGNETIC
TOOTH CLUTCHES

BRAKE MOTORS

POWER SUPPLIES

Product model BXR(LE)

Employed device Vertically Articulated Robots

The BXR(LE) models owes its ultra-thin profile

to a dedicated controller. Mounted on the
output shaft, it is ideal for applications where
space is limited. Its dedicated controller also
saves energy.

Product model BXH

Employed device Forklifts

Spring-actuated brake BXH model for electric forklift.

Compact, high torque design.

257
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

SPRING-ACTUATED BRAKES
Motors, articulated robots, actuators,
machine tools, forklifts, aerial vehicles, hoists,
Application
electric carts, electric shutters, medical equipment, wind
turbine generators

Provides Excellent Performance in Emergency Braking

When Power Goes Out and in Long-term Holding
These are electromagnetic brakes actuated by the force of springs when not energized. These standard
brakes boast a variety of advantages, including quiet operation, long service life, slim form factors, high
torque in a compact package, stable braking force, and the ability to release manually. We can create
custom designs for you based on these standard products.
 337
Available Models COUPLINGS

ETP BUSHINGS
Series Application Features Lineup
ELECTROMAGNETIC
CLUTCHES & BRAKES
SPRING-ACTUATED Compact, dual side
BRAKE
Braking use
mounting
BXW(L) SPEED CHANGERS
& REDUCERS

Double plate BXL INVERTERS

Double plate BXL(N) LINEAR SHAFT DRIVES

TORQUE LIMITERS
Compact, dual side BXW(H)
Holding use
mounting
ROSTA
For compact servo BXW(R)
motors
SERIES
Compact, controller BXR(LE)

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
set ACTUATED MICRO
CLUTCHES & BRAKES

Double plate BXH ELECTROMAGNETIC-

ACTUATED
CLUTCHES & BRAKES
Double plate, slim BXR ELECTROMAGNETIC
form factor CLUTCH & BRAKE
UNITS
Compact, dual side BXW(S)
Dedicated for holding SPRING-ACTUATED
mounting
BRAKE

For details on selection, see P. 362 to 367. ELECTROMAGNETIC

TOOTH CLUTCHES

BRAKE MOTORS

Model Selection POWER SUPPLIES

Quiet mechanism
Models/ Mounting Release Reduced Reduced Reduced
Torque [N·m] Dust cover Slim
Type method lever aperiodic armature braking
noise pull-in noise noise

0.01 0.1 1 10 100 1000

Stator/
BXW(L/H/S) 0.12 ∼ 5.20 Option Option Customization Std. Customization Customization
Plate

BXW(R) Stator 0.30 ∼ 2.50 ─ ─ Customization Customization Customization Customization

MODELS

BXW
BXR(LE) Stator 0.06 ∼ 3.20 ─ ─ Std. Customization Customization Customization
BXR

BXL
BXR Stator 5 ∼ 55 ─ ─ Std. Customization Customization Customization
BXH

BXL(N)

BXL Stator 2 ∼ 22 Option ─ Customization Option Option Std.

BXH Stator 4 ∼ 44 Option ─ Customization Option Customization Customization

BXL(N) Stator 2 ∼ 80 ─ ─ Customization Option Option Std.

337
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

Product Lineup

BX W(L /H/S) Braking use Holding use Dedicated

for holding
2-way
mounting
Quiet Long No break-in
service life needed
Some
exceptions
■ Three types for various applications ■ Structure apply

The line-up includes three types: the L type Has release lever
for braking, the H type for holding, and the
Armature
S type dedicated for holding.
Rotor
Stator
Hexagon head set
■ 2-way mounting screw
Coil
Mountable on either the stator or the plate, allow- Rotor hub
ing the stator (a heat source) to be located freely. Torque
Hexagon socket
countersunk
spring head bolt
Brake type BXW(L) BXW(H) BXW(S)
Lead wires Silencing spring
Brake torque [N·m] 0.12 ∼ 2.00 0.24 ∼ 4.00 0.36 ∼ 5.20
Plate
Operating O-ring
temperature [℃ ] ー 10 ∼＋40 ー 10 ∼＋40 ー 10 ∼＋40
Release lever
Backlash Extremely Extremely Extremely
small size small size small size

BX W (R ) Holding use High

torque
Low
inertia
No break-in
needed

■ Dedicated design for small servo ■ Structure

motors
Stator Armature
These have dedicated designs matched for
Rotor
specifications and dimensions for □ 40, □
60, and □ 80 small servo motors. Coil
Rotor hub
■ Low-inertia rotor Torque
Hexagon socket
countersunk
spring head bolt
We succeeded in dramatically reducing
Lead wires
both mass and drag wear while ensuring Plate
adequate strength.
Brake torque [N·m] 0.30 ∼ 2.50
Operating
temperature [℃ ] ー 10 ∼＋ 40

Backlash Extremely small size

BX R(LE) Holding use Ultra-slim Low

inertia
No break-in
needed

■ Ultra compact ■ Structure

Use with a built-in dedicated controller
provides a range of benefits, including Stator Armature
an ultra-thin profile, reduced energy
Rotor
consumption, lower heat emissions, higher
Coil
torque and a longer service life. Countersunk
head bolt
Brake torque [N·m] 0.06 ∼ 3.20 Torque
spring Lead wires
Operating
temperature [℃ ] ー 10 ∼＋ 40
Plate
Backlash Extremely small size

BX R Holding use Ultra-slim Low

inertia
Spline No break-in
needed

■ Ultra-slim ■ Structure
This ultra-slim design is two-thirds the
thickness of our previous design.
Armature
■ Low-inertia rotor Stator
We succeeded in dramatically reducing Rotor

both mass and drag wear while ensuring Coil Rotor hub

adequate strength.
Torque spring Hexagon socket
countersunk head
■ Extremely small backlash bolt
Plate
The backlash of the spline hub type is 0.2°
to 0.5°
. Lead wires

Brake torque [N·m] 5 55

Operating
[℃ ] ー 10 ∼＋ 40
temperature
Backlash Extremely small size

338
 339
COUPLINGS

ETP BUSHINGS

BX L Braking use Quiet Stable

braking
Long
service life
ELECTROMAGNETIC
CLUTCHES & BRAKES

■ Low noise ■ Structure SPEED CHANGERS

These reduce annoying high-frequency friction & REDUCERS

noise during braking. Products that reduce
aperiodic noise or armature pull-in noise are also INVERTERS
available. Stator Armature
Stud bolt Auxiliary spring
LINEAR SHAFT DRIVES
■ Stable braking Coil
Rotor
With low torque fluctuation, these brake
loads instantly even when malfunctions Rotor spring Hexagonal nut TORQUE LIMITERS
occur. Torque spring
Plate
Brake torque [N·m] 2 ∼ 22 Lead wires Rotor hub ROSTA
Operating [℃ ] ー 10 ∼＋ 40
temperature
Backlash Extremely small size
SERIES

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
ACTUATED MICRO
CLUTCHES & BRAKES
ELECTROMAGNETIC-
ACTUATED
CLUTCHES & BRAKES

ELECTROMAGNETIC

BX H Holding use High

torque
Quiet No break-in
needed
CLUTCH & BRAKE
UNITS

SPRING-ACTUATED
■ For holding use ■ Structure BRAKE

These brakes ensure sufficient torque

for holding applications while also being ELECTROMAGNETIC
TOOTH CLUTCHES
usable as emergency brakes. Stator Armature

Stud bolt Auxiliary spring

■ High torque BRAKE MOTORS
Rotor
Provide twice the torque with the same Coil

dimensions as BXL models. Hexagonal nut

Torque spring Plate POWER SUPPLIES

Rotor hub
Brake torque [N·m] 4 44 Lead wires
Operating [℃ ] ー 10 ∼＋ 40
temperature
Backlash Extremely small size

BX L(N) Braking use Quiet Stable

braking
Long
service life
MODELS
■ Low noise ■ Structure
BXW
These reduce annoying high-frequency
friction noise during braking. Products that BXR
reduce aperiodic noise or armature pull-in
Stator Armature BXL
noise are also available.
Coil Collar
BXH
■ Variety of torques Rotor
Two to three different kinds of braking BXL(N)
Rotor spring Plate
torque for the same outer diameter are
Torque spring Hexagon socket
available to permit the most suitable design countersunk
for the application at hand. head bolt
Lead wires
Rotor hub

Brake torque [N·m] 2 ∼ 80

Operating [℃ ] 0 ∼＋ 40
temperature
Backlash Extremely small size

339
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

Customization Examples

■ BXW Large Type ■ Integrated coupling-rotor hub type

This is a large version of the BXW with static friction torque Even more compact devices can be designed by fitting the
of 300 N•m. slim and compact BXR model spline rotor hub into a metal
Backlash is kept extremely small by locking the rotor hub plate-spring-type coupling exterior.
to the rotor via a disc spring.

■ Types with Integrated Flanges ■ Special Release Levers

Mounting flanges and brake stators can be integrated. Release levers can also be designed for specific units to
This helps reduce the number of components and saves match the device construction.
space.

Contact Miki Pulley from our website for details.

340
For inquiries on customization www.mikipulley.co.jp Web code Z001
0000
 341
FAQ COUPLINGS

ETP BUSHINGS
I don't see anything with the torque and response I need in your standard products.
Q1 Can you customize something for me?
ELECTROMAGNETIC
CLUTCHES & BRAKES

SPEED CHANGERS
A We can customize units in many ways: outfitting them for
& REDUCERS
overexcitation power supplies or use of inrush current at
INVERTERS
motor startup, changing the frictional material, boosting
torque, increasing response, extending the total energy
LINEAR SHAFT DRIVES
(service life), suppressing heat generation, and more. Consult
Miki Pulley for details. TORQUE LIMITERS

ROSTA

Overexcitation power supply SERIES

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
BEW-2FH
ACTUATED MICRO
CLUTCHES & BRAKES
ELECTROMAGNETIC-

Q2 Can you handle cases in which standard products cannot be installed due to dimensional constraints? ACTUATED
CLUTCHES & BRAKES

ELECTROMAGNETIC
A Yes, we can. For example, we have a long track record creating slimmer units that deliver the same torque. These units can
CLUTCH & BRAKE
provide the same torque while being only about half as thick as the standard product, although this will vary with your conditions. UNITS
Consult Miki Pulley for details.
SPRING-ACTUATED
BRAKE

Q3 What do you have for dealing with noise issues?

ELECTROMAGNETIC
TOOTH CLUTCHES
A Spring-actuated brakes have a number of types of noises, such as (1) rattling generated by microvibrations during rotating, (2)
armature pull-in and release noise, (3) friction noise (chirping) during braking, and (4) grinding noise under drive (when the brake
BRAKE MOTORS
is released). We have ways of reducing all of these. The figure below shows an example.

To reduce pull-in/release noise: Special plate specification To reduce grinding noise:

POWER SUPPLIES
Single-side braking specification
Laminated plate (sound-reduction mechanism)

Torque spring Armature (movable

iron plate)

Rotor (rotating part of frictional

material) Sound-reducing
Rotor hub (mounting part for damper
rotation shaft) Coil

MODELS

BXW

BXR

BXL

BXH

BXL(N)

341
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXW(L/H/S) Models
Specifications

■ BXW- □ - □ L (Braking use)

Coil (at 20℃ ) Lead wire

resistance
Static friction Max. Rotating part Allowable braking Total braking Armature Armature
Size Mass

Heat
class
Model torque Voltage Wattage Current Resistance UL rotation speed moment of inertia energy rate energy pull-in time release time
Size [kg]
Ts [N·m] [V] [W] [A] [Ω] style [min-1] J [kg·m2] Pbaℓ [W] ET[J] ta [s] tar [s]
12 5.0 0.417 28.8 F
24 5.0 0.208 115 F
BXW-01-10L 01 0.12 45 5.0 0.111 405 F UL3398 AWG26 5000 0.6 × 10 − 6 2.5 1.5 × 106 0.008 0.015 0.2
90 5.0 0.056 1622 F
180 5.0 0.028 6486 F
12 6.6 0.550 21.8 F
24 6.6 0.275 87.3 F
BXW-02-10L
02 0.25 45 6.6 0.147 307 F UL3398 AWG26 5000 1.9 × 10 − 6 5.0 3.0 × 106 0.008 0.015 0.3
BXW-02-12L
90 6.6 0.073 1228 F
180 6.6 0.037 4912 F
12 9.0 0.750 16.0 F
24 9.0 0.375 64.0 F
BXW-03-10L
03 0.50 45 8.2 0.182 247 F UL3398 AWG26 5000 3.8 × 10 − 6 10.0 4.5 × 106 0.025 0.025 0.4
BXW-03-12L
90 8.2 0.091 988 F
180 8.2 0.046 3954 F
12 11.5 0.958 12.5 F
24 11.5 0.479 50.1 F
BXW-04-10L
04 1.00 45 10.0 0.222 203 F UL3398 AWG22 5000 12.0 × 10 − 6 20.0 7.0 × 106 0.030 0.030 0.6
BXW-04-12L
90 10.0 0.111 810 F
180 10.0 0.056 3241 F
12 13.0 1.083 11.1 F
24 13.0 0.542 44.3 F
BXW-05-10L
05 2.00 45 13.0 0.289 156 F UL3398 AWG22 5000 23.0 × 10 − 6 30.0 12.0 × 106 0.035 0.035 0.8
BXW-05-12L
90 13.0 0.144 623 F
180 13.0 0.072 2492 F
* Depending on the initial torque characteristics, break-in to condition the engaging surfaces may be required.

■ BXW- □ - □ H (Holding use)

Coil (at 20℃ ) Lead wire
resistance

Static friction Max. Rotating part Allowable braking Total braking Armature Armature
Mass
Size

Heat
class

Model torque Voltage Wattage Current Resistance UL rotation speed moment of inertia energy rate energy pull-in time release time
Size [kg]
Ts [N·m] [V] [W] [A] [Ω] style [min-1] J [kg·m2] Pbaℓ [W] ET[J] ta [s] tar [s]
12 5.0 0.417 28.8 F
24 5.0 0.208 115 F
BXW-01-10H 01 0.24 45 5.0 0.111 405 F UL3398 AWG26 5000 0.6 × 10 − 6 0.5 0.2 × 106 0.010 0.010 0.2
90 5.0 0.056 1622 F
180 5.0 0.028 6486 F
12 6.6 0.550 21.8 F
24 6.6 0.275 87.3 F
BXW-02-10H
02 0.50 45 6.6 0.147 307 F UL3398 AWG26 5000 1.9 × 10 − 6 1.0 0.3 × 106 0.010 0.010 0.3
BXW-02-12H
90 6.6 0.073 1228 F
180 6.6 0.037 4912 F
12 9.0 0.750 16.0 F
24 9.0 0.375 64.0 F
BXW-03-10H
03 1.00 45 8.2 0.182 247 F UL3398 AWG26 5000 3.8 × 10 − 6 2.0 0.5 × 106 0.035 0.020 0.4
BXW-03-12H
90 8.2 0.091 988 F
180 8.2 0.046 3954 F
12 11.5 0.958 12.5 F
24 11.5 0.479 50.1 F
BXW-04-10H
04 2.00 45 10.0 0.222 203 F UL3398 AWG22 5000 12.0 × 10 − 6 4.0 1.0 × 106 0.040 0.025 0.6
BXW-04-12H
90 10.0 0.111 810 F
180 10.0 0.056 3241 F
12 13.0 1.083 11.1 F
24 13.0 0.542 44.3 F
BXW-05-10H
05 4.00 45 13.0 0.289 156 F UL3398 AWG22 5000 23.0 × 10 − 6 6.0 2.0 × 106 0.045 0.030 0.8
BXW-05-12H
90 13.0 0.144 623 F
180 13.0 0.072 2492 F

■ BXW- □ - □ S (Dedicated for holding)

Coil (at 20℃ ) Lead wire
resistance

Static friction Max. Rotating part Allowable braking Total braking Armature Armature
Mass
Size

Heat
class

Model torque Voltage Wattage Current Resistance UL rotation speed moment of inertia energy rate energy pull-in time release time
Size -1 2
[kg]
Ts [N·m] [V] [W] [A] [Ω] style [min ] J [kg·m ] Pbaℓ [W] ET[J] ta [s] tar [s]
BXW-01-10S 01 0.36 24 5.0 0.208 115 F UL3398 AWG26 5000 0.6 × 10 − 6 − − 0.025 0.010 0.2
BXW-02-10S −6
02 0.75 24 6.6 0.275 87.3 F UL3398 AWG26 5000 1.9 × 10 − − 0.030 0.010 0.3
BXW-02-12S
BXW-03-10S −6
03 1.50 24 9.0 0.375 64.0 F UL3398 AWG26 5000 3.8 × 10 − − 0.035 0.020 0.4
BXW-03-12S
BXW-04-10S
04 2.60 24 11.5 0.479 50.1 F UL3398 AWG22 5000 12.0 × 10 − 6 − − 0.040 0.025 0.6
BXW-04-12S
BXW-05-10S
05 5.20 24 13.0 0.542 44.3 F UL3398 AWG22 5000 23.0 × 10 − 6 − − 0.045 0.030 0.8
BXW-05-12S
* The armature pull-in time and armature release time are taken during DC switching.

342
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COUPLINGS
Dimensions
ETP BUSHINGS
（K）
２−ｍ
（K） 30°
G
G N
N 30° ２-ｍ ELECTROMAGNETIC

0°
10
V 2- 3- CLUTCHES & BRAKES
2- S bP9 V

F
SPEED CHANGERS

□
F
180°

□
φC

φA
φD
φA
φD

φC
φB
φB
φE

φE
dH8

0°
J L J L & REDUCERS

t +0.3

3-12
φdH8

0
180

3-1
INVERTERS

20
P

°
4-φR

P
6-φR
a 3-S

20°
I Release direction Release direction °
LINEAR SHAFT DRIVES
I 45
） Q
Lead wire （7° Lead wire
length: 400 mm U length: 400 mm ）
（7° Q
（O） TORQUE LIMITERS
（O） U

Size #01, #02 Size #03, #04, #05

Unit [mm] ROSTA
Radial direction dimensions Axial direction dimensions Bore dimensions
Size

A B C D E S V R F m O P Q U G I J K L N a d b t
SERIES
5
01 37 32 18 13.5 12.0 6 3 3 10 M3 − − − − 4.5 5.0 22.5 31.5 9 22.5 0.10 − −

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
6
ACTUATED MICRO
6 CLUTCHES & BRAKES
02 47 40 21 16.0 14.5 7 3.4 3.4 12 M3 9(10.2) 50 13 51 6.0 5.5 19.2 31.2 12 20.0 0.10 − −
7 ELECTROMAGNETIC-
03 56 48 24 19.0 17.0 7 3.4 3.4 14 M3 11(11.7) 60 15 60 6.0 6.0 19.9 31.9 12 20.0 0.15 8 − − ACTUATED
CLUTCHES & BRAKES
04 65 58 35 24.0 22.0 7 3.4 3.4 18 M4 12(12.5) 70 15 70 7.0 7.0 19.9 33.9 14 21.0 0.15 10 3 1.2
ELECTROMAGNETIC
05 75 66 36 28.0 26.5 9 4.5 4.5 22 M4 14(14.5) 80 20 80 7.0 7.0 22.1 36.1 14 21.5 0.15 12 4 1.5
CLUTCH & BRAKE
* There is no release lever option for size #01. UNITS
* The dimensions in parentheses ( ) are values for BXW- □ - □ S.

SPRING-ACTUATED
How to Place an BXW-01-10L-24V-5 BRAKE

Order Size Bore diameter (dimensional symbol d) ELECTROMAGNETIC

Release lever Voltage (Specifications table) TOOTH CLUTCHES
10: Not included Application L: Braking-use H: Holding-use
12: Included S: Dedicated for holding
* Models equipped with the release lever and models with 12-V and 180-V voltage specifications are made to order. BRAKE MOTORS
* Contact Miki Pulley for assistance with bore diameters, d, not listed in the Dimensions tables and voltages not listed in the Specifications table.

POWER SUPPLIES
Options Dust Cover
Dust covers are available as options. These enable use in challenging
environments by keeping out foreign matter.
Dust covers come in two types: full covers that have no hole for the
shaft, and shaft-hole covers, which can be used on brakes mounted
with the shaft passing through. You can also choose the locations of
the lead exit holes for brakes mounted on plates or mounted on
stators.

Specifications Dimensions
MODELS

Material Ethylene propylene diene monomer (EPDM) rubber B Shape No. a b c BXW
Temperature range -40℃ to 140℃ 01 × × ×
BXR
Exterior color Black 02 × × ○
φA
d

Applicable brake models L type, H type, S type BXW models 03 × ○ × BXL

φ

Applicable brake sizes #01, #02, #03, #04, #05 a b c 04 ○ × ×

BXH
Applicable specification voltages 12 V DC, 24 V DC, 45 V DC, 90 V DC, 180 V DC 05 ○ × ○
BXL(N)
* This temperature range is for dust cover materials. The operating temperature for BXW models is -10°C to 40°C. 06 ○ ○ ×
* Cannot be mounted on BXW models with release levers or R-type BXW models.

Unit [mm]

How to Place an Model φA B φd

BXW-01-C02
Order BXW-01-C □ 41 33 16

Brake size BXW-02-C □ 51 33 21

01, 02, 03, 04, 05
BXW-03-C □ 60 33.5 24
Shape no.
BXW-04-C □ 69 35.5 30
01, 02, 03, 04, 05, 06
BXW-05-C □ 79 37.5 30
* Symbol a indicates a hole made for brakes with shafts passing through; symbol b indicates a hole made for
lead exit when mounted on a plate; symbol c indicates a hole made for lead exit when mounted on a stator.
* Shapes #01 and #04 require that a hole be made separately for leads to exit.

343
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0000
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXW(R) Models
Specifications
Coil (at 20℃ ) Lead wire

resistance
Static Max. Rotating part Allowable Total
Armature Armature

Heat
class
friction rotation moment of braking braking Mass

Size
Model Voltage Wattage Current Resistance UL pull-in time release time
torque Size speed inertia energy energy [kg]
[V] [W] [A] [Ω] style ta [s] tar [s]
Ts [N·m] [min-1] J [kg·m2] Ebaℓ [J] ET [J]

BXW-01-10R 01 0.3 24 6.1 0.254 94.4 F UL3398 AWG26 6000 1.36 × 10 − 7 15 3000 0.035 0.020 0.1

BXW-03-10R 03 1.3 24 7.2 0.300 80.0 F UL3398 AWG22 6000 1.17 × 10 − 6 87 17000 0.050 0.020 0.3
BXW-05-10R 05 2.5 24 8.0 0.333 72.0 F UL3398 AWG22 6000 3.68 × 10 − 6 200 40000 0.060 0.020 0.5
* The armature pull-in time and armature release time are taken during DC switching.

Dimensions
（K）

r N 3-S

°
20

F
φAｆ8 (H: Case depth)

□
3-1
φd H7
φC
φD

J L

φB
φR
φE
G

a
3-φV

30°
I

Lead wire *The lead wire exit for size #01

Length: 200 mm is located in the dashed area.

Unit [mm]
Radial direction dimensions Axial direction dimensions Bore dimensions
Size

A r B C D E S V R F G H I J K L N a d d max
01 33 R0.5 26.5 16 9 14 7 3.4 32.5 12 0.2 4 19 25.5 26 30 4 22.8 0.1 8.5 8.5
03 48 R1 42 26 14 23 8 3.4 47.5 19 0.2 4 18 25.5 26 30 4 22.6 0.1 11 15

05 64 R1 56 28 22 31 8 4.5 63.5 25 0.2 4 16 25 25.5 30 4.5 21.3 0.1 16 20

* Bore diameters other than the standard bore diameters given above are also possible. d max indicates the maximum bore diameter with a round shaft.
* In addition to round bores, key processing can also be handled. Consult Miki Pulley for details.
* Dimensions, mounting and the like are not interchangeable with other BXW models.

How to Place an
BXW-01-10R-24V-8.5
Order
Size Bore diameter (dimensional symbol d)
Release lever Voltage (Specifications table)
10: Not included Application R: Servo motor-use

*Contact Miki Pulley for assistance with bore diameters, d, not listed in the Dimensions tables and voltages not listed in the Specifications table.

344
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0000
 345
BXW Models
COUPLINGS
Items Checked for Design Purposes
ETP BUSHINGS
■ Precautions for Handling ■ Precautions for Use
ELECTROMAGNETIC
■ Brakes ■ Applications
CLUTCHES & BRAKES
Most electromagnetic braking systems are made using flexible This brake is available in braking, holding, and dedicated for holding types
materials. Be careful when handling such parts and materials as according to the application. SPEED CHANGERS
striking or dropping them or applying excessive force could cause Do not use BXW(H/R) types for ordinary braking, except for emergency & REDUCERS
them to become damaged or deformed. braking in the event of a power outage or the like. You should note that
BXW(S) types dedicated for holding cannot effect emergency braking in the
INVERTERS
■ Lead Wires event of a power outage.
Be careful not to pull excessively on the brake lead wires, bend them at Model (type) Application Braking: possible/not possible
LINEAR SHAFT DRIVES
sharp angles, or allow them to hang too low. BXW(L) Braking use Possible
Limited to emergency braking during
■ Frictional Surface BXW(H) Holding use
power outage, etc. TORQUE LIMITERS
Since these are dry brakes, they must be used with the frictional Dedicated for
BXW(S) Not possible
surface dry. Keep water and oil off of the frictional surfaces when holding
ROSTA
handling the brakes. Limited to emergency braking during
BXW(R) Holding use
power outage, etc.

■ Precautions for Mounting ■ Environment SERIES

■ Mounting Orientation These brake units are dry braking systems, meaning that the torque will

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
BXW models can be mounted on either the stator or the plate. Select drop if oil residue, moisture, or other liquids get onto friction surfaces. ACTUATED MICRO
your mounting orientation as the application dictates. Be aware, In addition to friction surfaces, lead wires are not oil resistant. Lead wire CLUTCHES & BRAKES
however, that the BXW(R) type is only compatible with stator covers may deteriorate noticeably in environments exposed to oil,
cutting oil, etc. ELECTROMAGNETIC-
centering-mark mounting. Your understanding is appreciated. ACTUATED
■ Operating Temperature CLUTCHES & BRAKES
■ Affixing the Rotor Hub The operating temperature range is -10°C to 40°C. If you will use the ELECTROMAGNETIC
product at other temperatures, consult Miki Pulley. CLUTCH & BRAKE
Affix the rotor hub to the shaft with hex-socket-head set screws such
that the rotor hub does not touch the armature or stator. If you are UNITS
applying adhesive to the hex-socket-head set screws, be careful that
■ Power Supplies
the adhesive does not come out onto the rotor hub surface. Note also BXW models use commercial AC 100 V or 200 V single phase, full-wave SPRING-ACTUATED
that since the BXW(R) type is constructed so that the rotor hub does rectified or half-wave rectified. Select as appropriate for your BRAKE
not go through the stator, affix it by press-fitting it onto the shaft at a application. See the table below, "Recommended power supplies and
position that does not touch the armature (see dimension J) when circuit protectors," for the power supply devices we recommend. ELECTROMAGNETIC
they are assembled. TOOTH CLUTCHES
■ Power Supply Voltage Fluctuations
■ Mounting the Brake Full braking performance may not be guaranteed with extreme
Implement screw-locking measures such as use of an adhesive thread- changes in power supply voltage. Make sure to keep power supply BRAKE MOTORS
locking compound to bolts and screws used to install brakes. If using a voltage to within ± 10% of the rated voltage value.
spring washer to prevent loosening, use a conical spring washer, and ■ Air Gap Adjustment
POWER SUPPLIES
ensure that it does not contact the armature. BXW models do not require air gap adjustment. The brake air gap is
adjusted when the braking system is shipped from the factory.
■ Shafts
The shaft tolerance should be h7 class (JIS B 0401). Note that the ■ Initial Torque
harder the material used in the shaft, the less effective the hexagon- The torque may be lower than the indicated value at initial use. In such
cases, run it to break in the frictional surface before use.
socket set screw will be. Note also that for the BXW(R) type, the shaft is
press fitted into the rotor hub. We recommend that the shaft tolerance ■ Circuit Protectors
be a press-fit tolerance of r6 class (JIS B 0401). If using a power supply that is not equipped with a circuit protector for
DC switching, make sure to connect the recommended circuit
■ Accuracy of Brake Attachment Surfaces protector device in parallel with the brake.
Make sure that concentricity (X) and perpendicularity (Y) do not
exceed the allowable values of the table below. ■ Recommended Power Supplies and Circuit Protectors
Recommended power supplies
Concentricity (X) Perpendicularity (Y)
Size Input AC power Brake voltage Rectification method Recommended power
T.I.R. [mm] T.I.R. [mm] supply model
Single-phase, MODELS
AC100V 50/60Hz DC24V BES-20-71-1
01 0.05 0.02 full-wave
Single-phase,
AC100V 50/60Hz DC45V half-wave BEW-1R BXW
02 0.05 0.02
AC100V 50/60Hz DC90V Single-phase, BEW-1R
03 0.10 0.02 full-wave BXR
Single-phase,
AC200V 50/60Hz DC24V full-wave BES-20-71
04 0.10 0.02
AC200V 50/60Hz DC90V Single-phase, BEW-2R BXL
05 0.10 0.02 half-wave
Single-phase,
AC200V 50/60Hz DC180V BEW-2R BXH
full-wave
Stator mounted Stator mounted Plate mounted Single-phase,
AC400V 50/60Hz DC180V half-wave BEW-4R
X A BXW(R) type X A * A DC power supply such as a battery can also be used to supply the 24 V DC required for the brake voltage.
BXL(N)
Y A Y A

Recommended circuit protectors

Input voltage Brake voltage Rectification method Recommended circuit protector (varistor)
DC24V DC24V ー TND07V-820KB00AAA0 or an equivalent
Single-phase,
AC100V 50/60Hz DC45V half-wave TND07V-221KB00AAA0 or an equivalent
AC100V 50/60Hz DC90V Single-phase, TND07V-221KB00AAA0 or an equivalent
full-wave
Single-phase,
A A AC200V 50/60Hz DC90V TND07V-471KB00AAA0 or an equivalent
half-wave
AC200V 50/60Hz DC180V Single-phase, TND07V-471KB00AAA0 or an equivalent
Stator centering full-wave
location alignment Single-phase,
AC400V 50/60Hz DC180V TND14V-821KB00AAA0 or an equivalent
half-wave
* The above-model varistors are manufactured by Nippon Chemi-Con Corporation.
* DC24V indicates a product recommended with a stepdown transformer or the like.
* BXW models do not come with circuit protectors.

345
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXR(LE) Models
Specifications (Brake unit)
Coil (at 20℃ ) Lead wire
Armature Armature
Static Max. Rotating part Allowable Total
Overexcitation output Normal excitation output Heat pull-in release
friction rotation moment of braking braking Mass

Size
Model resistance UL time time
torque class Size speed inertia energy energy ［kg］
(24 V DC) (7 V DC)
Ts [N·m] Voltage Wattage Current Resistance Voltage Wattage Current Resistance style [min-1] J [kg·m2] Ebaℓ [J] ET [J]
［V］ ［W］ ［A］ ［Ω］ ［V］ ［W］ ［A］ ［Ω］ ta [s] tar [s]

BXR-015-10LE 015 0.06 24 16.5 0.688 35 7 1.4 0.200 35 F UL3398 AWG26 6000 3.34 × 10-8 5 1000 0.020 0.020 0.03
BXR-020-10LE 020 0.14 24 16.5 0.688 35 7 1.4 0.200 35 F UL3398 AWG26 6000 5.56 × 10-8 15 3000 0.035 0.020 0.06

BXR-025-10LE 025 0.32 24 16.5 0.688 35 7 1.4 0.200 35 F UL3398 AWG26 6000 1.56 × 10-7 15 3000 0.035 0.020 0.08
BXR-035-10LE 035 0.62 24 16.5 0.688 35 7 1.4 0.200 35 F UL3398 AWG26 6000 4.83 × 10-7 87 17000 0.050 0.020 0.12

BXR-040-10LE 040 1.32 24 16.5 0.688 35 7 1.4 0.200 35 F UL3398 AWG26 6000 6.32 × 10-7 87 17000 0.060 0.020 0.16

BXR-050-10LE 050 3.20 24 16.5 0.688 35 7 1.4 0.200 35 F UL3398 AWG26 6000 1.51 × 10-6 200 40000 0.060 0.020 0.40

Dimensions (Brake unit)

(K)
N a
r L
φAh9 (centering mark depth: 5 mm)

//
(φd H7)

6.3
6.3

0.
□

05
3
6.
φC

25

3-S

□
φD2

6.
φD
φB

F2
3
3-φV

3-1

Rotor hub machining dimensions

* The rotor hub used to couple the shaft and rotor can either be provided by
20

the customer based on the above diagram or selected from the optional
°

products on the right-hand page.

Rotor hubs can also be recommended or fabricated to the desired shape.
Rotor hub recommended Consult Miki Pulley for details.

mounting position: H Lead wire length: 400 mm 30°

Unit [mm]
Radial direction dimensions Axial direction dimensions Rotor hub machining dimensions
Size

Model
A r B C D d max. □F S V H K N a L D2 □ F2
0 0
BXR-015-10LE 015 26 R0.5 22 7 12 6 8 4.3 2.3 9.5 ∼ 10.0 14.0 7.0 0.1 4 or more 10− 0.1 8 − 0.07
0 0
BXR-020-10LE 020 32 R0.5 28 9 16 8 12 5.0 2.3 9.5 ∼ 10.0 14.0 7.0 0.1 4 or more 14− 0.1 12− 0.07
0 0
BXR-025-10LE 025 39 R0.5 33 9 18 8 12 5.5 3.0 9.5 ∼ 10.0 14.0 7.0 0.1 4 or more 14− 0.1 12− 0.07
0 0
BXR-035-10LE 035 48 R0.5 42 15 28 14 19 5.5 3.0 9.5 ∼ 10.0 14.0 7.0 0.1 4 or more 23− 0.1 19− 0.07
0 0
BXR-040-10LE 040 56 R0.5 50 15 27 14 19 6.5 3.4 9.9 ∼ 10.4 14.5 7.4 0.1 4 or more 23− 0.1 19− 0.07
0 0
BXR-050-10LE 050 71 R0.5 65 22 37 20 25 8.0 4.4 14.0 ∼ 14.4 19.0 10.5 0.1 4.5 or more 31− 0.1 25− 0.07

Specifications (Contro
(Con
ntro
ollller
er) Dimensions ((Contro
Contro
oller
lller)
+10
Model BEM-24ESN7-120N A part 19 120 0

Input voltage 24V DC ± 10% smoothing power supply

Initial: 24 V DC (0.2 sec.) Constant: 7 V DC ( ± 10%), PWM control
Output voltage
−
INPUT

* When the input voltage is 21 V DC, the output voltage is cut off.
（29）

Max. output current 1.0 A DC (ambient temp.: 20°C), 0.8 A DC (ambient temp.: 60°C)
＋
26.3

28

Time rating Continuous

OUTPUT

Insulating resistance 500 V DC, 100 M Ω with Megger (input/output - between terminal and case)
Dielectric strength voltage 1000 V AC, 50/60 Hz, 1 min. (input/output - between terminal and case)
Ambient environment -20 to 60°C, 5 to 95% RH, no condensation/freezing
1

Mass 0.02kg 4.5 13

2

Lead wire Function Description UL style Size

6

Red Input（＋） Connects the 24 V DC smoothing power supply (+) UL3398 AWG26
2

Black Input（−） Connects the 24 V DC smoothing power supply (-) UL3398 AWG26
0.5

2 5 5 Unit [mm]
Blue Output Connects the spring-actuated brake (either pole) UL3398 AWG26
Blue Output Connects the spring-actuated brake (either pole) UL3398 AWG26 A part detail *Case：PBT (UL94V-0), Mold: Epoxy (UL94V-0)

Structure (Co
ontroll
ntroller
lerr) Timing Chartt (Con
nttrolle
ro
olller)
Voltage

Lead wire (Red) Lead wire (Blue) *Controlled using ON/OFF on input side.
24V DC smoothing
power supply

Input
Brake coil
Control circuit

＋ Red - Black
24V

−
Output
Blue - Blue
7V

24V

Time
Lead wire (Black) Lead wire (Blue) 0.2ｓ 0.2ｓ

346
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0000
 347
COUPLINGS
Options Rotor Hub
■ Set screw type (C) ■ Press fit type (P) ETP BUSHINGS

L L ELECTROMAGNETIC

φd H7
φd H7

□
□
CLUTCHES & BRAKES

F2
F2
SPEED CHANGERS

φD2
φD2

& REDUCERS
2-m
Unit [mm] Unit [mm]
ｍ d d INVERTERS
Model Size L D2 □ F2 Model Size L D2 □ F2
Nominal dia. Standard Min. Max. Standard Min. Max.
0 0
BXR-015-10LE 015 10 10 8 − 0.07 M2.5 5 4 5 BXR-015-10LE 015 4 9.5 8 − 0.07 5 5 6 LINEAR SHAFT DRIVES
0 0
BXR-020-10LE 020 10 14 12 − 0.07 M3 8 5 8 BXR-020-10LE 020 4 14 12 − 0.07 8 7 8
0 0
BXR-025-10LE 025 10 16 12 − 0.07 M3 8 5 8 BXR-025-10LE 025 4 14 12 − 0.07 8 7 8 TORQUE LIMITERS
0 0
BXR-035-10LE 035 12 26 19 − 0.07 M4 14 8 14 BXR-035-10LE 035 4 23 19 − 0.07 14 9 14
0 0
BXR-040-10LE 040 12 26 19 − 0.07 M4 14 11 14 BXR-040-10LE 040 4 23 19 − 0.07 14 11 14 ROSTA
0 0
BXR-050-10LE 050 15 35 25 − 0.07 M5 20 15 20 BXR-050-10LE 050 4.5 31 25 − 0.07 20 15 20

How to Place an SERIES

BXR-015-10LE-006-C5
Order

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
ACTUATED MICRO
Size Bore diameter (dimension symbol: d)
CLUTCHES & BRAKES
Controller set type Option (Rotor Hub)
ELECTROMAGNETIC-
Blank: No rotor hub
C: Set screw type ACTUATED
Nominal static friction torque
P: Press fit type CLUTCHES & BRAKES
(3-digit number listed in the specifications tables)
ELECTROMAGNETIC
CLUTCH & BRAKE
Items Checked for Design Purposes UNITS

SPRING-ACTUATED
■ Precautions for Handling ■ Precautions for Mounting BRAKE
■ Brakes ■ Affixing the Rotor Hub
Electromagnetic brakes use many soft materials. Care should be taken In the design, the rotor hub section should be installed such that it ELECTROMAGNETIC
TOOTH CLUTCHES
during handling as accidentally striking, dropping or applying does not touch the armature or stator. Also, with the normal
excessive force to the brake could cause denting or deformation. installation method of using hexagon-socket set screws coated with
adhesive, take care not to trap adhesive between the screws and the BRAKE MOTORS
■ Lead wires
rotor hub surface.
Be careful not to pull excessively on the brake lead wires, bend them at
sharp angles or allow them to hang too low.
■ Mounting the Brake POWER SUPPLIES

■ Friction Surfaces Implement screw-locking measures such as use of an adhesive thread

Since these are dry brakes, they must be used with the friction surfaces locking compound to bolts and screws used to install brakes. If using a
dry. Keep water and oil away from the friction surfaces when handling spring washer to prevent loosening, use a conical spring washer, and
the brakes. ensure that it does not contact the armature.

■ Shafts
■ Precautions for Use The shaft tolerance should be h7 class (JIS B 0401). If using an optional
■ Holding use press-fit type rotor hub, we recommend that the shaft tolerance be a
These brakes are holding brakes. Do not use them for ordinary braking, press-fit tolerance of r6 class (JIS B 0401).
except for emergency braking in the event of a power outage or the like.

■ Environment ■ Accuracy of Brake Attachment Surfaces

These brake units are dry braking systems, meaning that the torque Make sure that the centering mark and shaft concentricity (X) and the
will drop if oil residue, moisture, or other liquids get onto friction shaft perpendicularity (Y) relative to the brake mounting surface do
MODELS
surfaces. In addition to friction surfaces, lead wires are not oil resistant. not exceed the allowable values in the table below.
Lead wire covers may deteriorate noticeably in environments exposed BXW
to oil, cutting oil, etc. Concentricity (X) Perpendicularity (Y)
Model Size BXR
T.I.R.［mm］ T.I.R.［mm］
■ Operating Temperature
The operating temperature range is -10°C to 40°C for brakes and -20° BXR-015-10LE 015 0.05 0.02 BXL
C to 60°C for dedicated controllers. If you will use the product at other BXR-020-10LE 020 0.05 0.02
BXH
temperatures, consult Miki Pulley. BXR-025-10LE 025 0.05 0.02

■ Power Supply Voltage Fluctuations BXR-035-10LE 035 0.05 0.02 BXL(N)

Full braking performance may not be guaranteed with extreme BXR-040-10LE 040 0.10 0.02
fluctuations in power supply voltage. Keep the power supply voltage BXR-050-10LE 050 0.10 0.02
to within ± 10% of the rated voltage.
X A
■ Air Gap Adjustment
Y A
BXR(LE) models do not require air gap adjustment. The brake air gap is Bolt
adjusted at shipment from the factory. Plate
Armature
■ Circuit Protectors Coil
Rotor hub
Circuit protectors should not be connected as they are built into the
dedicated controllers. Shaft
Hexagon-
socket set
■ Controller Operation Stator screw
A
The control function is operated by the ON/OFF switch on the input
Rotor
side, so switching should be carried out by the input side of the
dedicated controller. 347
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXR Models Square Hub Type

Specifications (BXR- □ -10)
Static Coil (at 20℃ ) Lead wire Max. Rotating Total Armature
Heat Allowable Armature
friction rotation part release Backlash Mass
braking braking

Size
Model Voltage Wattage Current Resistance resistance UL moment of pull-in
torque Size speed energy energy time tar [°] [kg]
class inertia time ta [s]
Ts [N·m] [V] [W] [A] [Ω] style [min-1] 2 Ebaℓ [J] E T[J] [s]
J [kg·m ]
BXR-06-10-005 06 5 24 17.6 0.73 32.7 F UL1333 AWG20 5000 2.35 × 10-5 500 2.0 × 105 0.050 0.020 1.2 0.9
BXR-08-10-012 08 12 24 19.4 0.81 29.7 F UL1333 AWG20 5000 3.45 × 10-5 800 2.0 × 105 0.080 0.020 1.2 1.2
BXR-10-10-016 10 16 24 21.5 0.90 26.8 F UL1333 AWG20 5000 1.12 × 10-4 1500 2.2 × 106 0.110 0.050 0.9 1.3

BXR-12-10-030 12 30 24 23.7 0.99 24.3 F UL1333 AWG20 5000 1.88 × 10-4 1500 2.5 × 106 0.120 0.030 0.8 2.3
BXR-14-10-038 14 38 24 31.0 1.29 18.6 F UL1333 AWG20 3600 4.22 × 10-4 1800 3.0 × 106 0.120 0.030 0.5 3.0
BXR-16-10-055 16 55 24 19.0 0.79 30.3 F UL1333 AWG20 3600 7.10 × 10-4 2000 3.0 × 106 0.220 0.100 0.5 3.6
* The armature pull-in time and armature release time are taken during DC switching.
* Backlash is the value between the rotor and rotor hub.

Dimension (BXR- □ -10)

K
3-φR

N a 3-S

F
□

3-
12
0°
b P9
(The case depth is 5 or greater.)

φdH7

J L
φDF 9
B

φE

φC

+0.5
φA

0
P.C.D.

t
ｒ

90°
Lead wire
length: 400
*The lead wire extraction position for size 14 is 60°
.

Unit [mm]
Radial direction dimensions Axial direction dimensions Bore diameter
Size
A B C D r E F R S J L N K a d b t d max
06 83.5 76 82 47 R0.5 42 35 4.5 9 17.0 7 14.7 25.0 0.10 20 6 22.5 25
08 93.5 85 92 49 R0.5 42 35 4.5 10 19.0 7 15.7 27.0 0.10 20 6 22.5 25

10 123.5 115 122 62 R0.5 55 45 4.5 9.5 14.6 9 13.7 24.3 0.10 24 8 27 28

12 137.5 130 136 65 R1 62 50 4.5 12 15.4 9 12.5 25.0 0.15 24 8 27 30

14 167.5 158 166 80 R1 74 60 5.5 12 16.0 9 12.0 25.0 0.15 28 8 31 38

16 185 175 184 100 R1 86 65 5.5 12.5 21.3 11.5 19.4 32.8 0.20 28 8 31 45

How to Place an BXR-14-10-038-24V-28DIN

Order Bore diameter (dimensional symbol d)
Size Voltage

Static friction torque [N·m]

(Refer to the Specifications table for details on the three-digit code.)

Shape fitting
10: Square
* Contact Miki Pulley for details on bore diameter d specifications not given in the table.

348
To download CAD data or product catalogs: www.mikipulley.co.jp Web code C018
0000
 349
BXR Models Spline Hub Type
COUPLINGS
Specifications (BXR- □ -20)
ETP BUSHINGS
Static Coil (at 20℃ ) Lead wire Max. Rotating Total Armature Armature
Heat Allowable
friction rotation part braking pull-in release Backlash Mass
braking
Size

Model Voltage Wattage Current Resistance resistance UL moment of ELECTROMAGNETIC

torque Size speed energy energy time ta time tar [°] [kg]
class inertia
Ts [N·m] [V] [W] [A] [Ω] style [min-1] 2 Ebaℓ [J] ET[J] [s] [s] CLUTCHES & BRAKES
J [kg·m ]
BXR-06-20-005 06 5 24 17.6 0.73 32.7 F UL1333 AWG20 5000 3.39 × 10-5 500 2.0 × 105 0.050 0.020 0.5 1.1 SPEED CHANGERS
BXR-08-20-012 08 12 24 19.4 0.81 29.7 F UL1333 AWG20 5000 7.56 × 10-5 800 2.0 × 105 0.080 0.020 0.4 1.4 & REDUCERS
BXR-10-20-016 10 16 24 21.5 0.90 26.8 F UL1333 AWG20 5000 3.02 × 10-4 1500 2.2 × 106 0.110 0.050 0.3 1.6
INVERTERS
BXR-12-20-030 12 30 24 23.7 0.99 24.3 F UL1333 AWG20 5000 4.77 × 10-4 1500 2.5 × 106 0.120 0.030 0.3 2.6
BXR-14-20-038 14 38 24 31.0 1.29 18.6 F UL1333 AWG20 3600 11.3 × 10-4 1800 3.0 × 106 0.120 0.030 0.2 3.5
LINEAR SHAFT DRIVES
-4
BXR-16-20-055 16 55 24 19.0 0.79 30.3 F UL1333 AWG20 3600 19.1 × 10 2000 3.0 × 106 0.220 0.100 0.2 4.1
* The armature pull-in time and armature release time are taken during DC switching.
* Backlash is the value between the rotor and rotor hub. TORQUE LIMITERS

ROSTA

Dimension (BXR- □ -20) SERIES

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
K K ACTUATED MICRO
CLUTCHES & BRAKES
3-φR

3-φR

N a N a 3-S
ELECTROMAGNETIC-
ACTUATED

3-
CLUTCHES & BRAKES

12
0°
ELECTROMAGNETIC
CLUTCH & BRAKE
(The case depth is 5 or greater.)

(The case depth is 5 or greater.)

b P9 UNITS
φdH 7
φdH 7
P.C.D. B

P.C.D. B

SPRING-ACTUATED
φD F 9

φD F 9

+0.5
φA

φE

φE
φA
φC

φC

0
BRAKE
J L J1 L

t
ELECTROMAGNETIC
ｒ

TOOTH CLUTCHES

BRAKE MOTORS

K1
Lead wire 90°
POWER SUPPLIES
Assembly A Assembly B length: 400
*The lead wire extraction position for size 14 is 60°.

Unit [mm]
Radial direction dimensions Axial direction dimensions Bore diameter
Size
A B C D r E R S J J1 L N K K1 a d b t d max
06 83.5 76 82 47 R0.5 36 4.5 9 10.5 18 12.5 14.7 25.0 30.5 0.10 20 6 22.5 25
08 93.5 85 92 49 R0.5 42 4.5 10 11.5 20 13.5 15.7 27.0 33.5 0.10 20 6 22.5 30

10 123.5 115 122 62 R0.5 56 4.5 9.5 9 18 15 13.7 24.3 33 0.10 24 8 27 40

12 137.5 130 136 65 R1 61 4.5 12 8.7 17.7 15 12.5 25.0 32.7 0.15 24 8 27 45
14 167.5 158 166 80 R1 75 5.5 12 7.2 17.2 16 12.0 25.0 33.2 0.15 28 8 31 55

16 185 175 184 100 R1 82 5.5 12.5 13.6 24.6 18 19.4 32.8 42.6 0.20 28 8 31 65

MODELS

BXW
How to Place an BXR-14-20-038-24V-28DIN
Order BXR
Bore diameter (dimensional symbol d)
Size Voltage BXL

Static friction torque [N·m] BXH

(Refer to the Specifications table for details on the three-digit code.)
BXL(N)
Shape fitting
20: Spline
* Contact Miki Pulley for details on bore diameter d specifications not given in the table.

349
To download CAD data or product catalogs: www.mikipulley.co.jp Web code C018
0000
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXR Models
Items Checked for Design Purposes

■ Precautions for Handling ■ Precautions for Use

■ Brakes ■ Holding use
Most electromagnetic braking systems are made using flexible These brakes are holding brakes. Do not use them for ordinary braking,
materials. Be careful when handling such parts and materials as except for emergency braking in the event of a power outage or the like.
striking or dropping them or applying excessive force could cause
■ Environment
them to become damaged or deformed.
These brake units are dry braking systems, meaning that the torque will
■ Lead Wires drop if oil residue, moisture, or other liquids get onto friction surfaces.
Be careful not to pull excessively on the brake lead wires, bend them at Lead wires are not oil resistant. Consider using a cover or other
sharp angles, or allow them to hang too low. protection when using in an environment exposed to oil, cutting oil,
etc.
■ Frictional Surface
Since these are dry brakes, they must be used with the frictional ■ Operating Temperature
surface dry. Keep water and oil off of the frictional surfaces when The operating temperature range is -10°C to 40°C. If you will use the
handling the brakes. product at other temperatures, consult Miki Pulley.

■ Power Supplies
BXR models use commercial AC 100 V or 200 V single phase, full-wave
rectified. Select as appropriate for your application. See the table,
"Recommended power supplies and circuit protectors," for the power
supply devices we recommend.

■ Power Supply Voltage Fluctuations

Full braking performance may not be guaranteed with extreme
changes in power supply voltage. Make sure to keep power supply
voltage to within ± 10% of the rated voltage value.

■ Air Gap Adjustment

BXR models do not require air gap adjustment. The brake air gap is
adjusted when the braking system is shipped from the factory.

■ Circuit Protectors
If using a power supply that is not equipped with a circuit protector for
DC switching, make sure to connect the recommended circuit
protector device in parallel with the brake.

350
 351
COUPLINGS
■ Precautions for Mounting ■ Recommended Power Supplies and
■ Affixing the Rotor Hub Circuit Protectors ETP BUSHINGS
Affix the rotor hub to the shaft with bolts, snap rings, or the like such
Recommended power supplies
that the rotor hub does not touch the armature or stator. Leave at least ELECTROMAGNETIC
Input AC power Brake voltage Rectification Brake size Recommended power
dimension J/J1on spline hub types, since the rotor hub may contact method supply model CLUTCHES & BRAKES
Single-phase,
the armature. AC100V 50/60Hz DC24V 06,08,10 BES-20-71-1
full-wave SPEED CHANGERS
Single-phase,
AC100V 50/60Hz DC24V full-wave 12,14,16 BES-20-72-1 & REDUCERS
■ Mounting the Brake AC200V 50/60Hz DC24V Single-phase, 06,08,10 BES-20-71
full-wave
Implement screw-locking measures such as use of an adhesive thread- AC200V 50/60Hz DC24V
Single-phase,
12,14,16 BES-20-72 INVERTERS
full-wave
locking compound to bolts and screws used to install brakes. If using a * A DC power supply such as a battery can also be used to supply the 24 V DC required for the brake
spring washer to prevent loosening, use a conical spring washer, and voltage. LINEAR SHAFT DRIVES
ensure that it does not contact the armature.
Circuit protector
TORQUE LIMITERS
■ Shafts Brake voltage Included varistors
The shaft tolerance should be h7 class (JIS B 0401). DC24V TND07V-820KB00AAA0 or an equivalent
ROSTA
* The above-model varistors are manufactured by Nippon Chemi-Con Corporation.
■ Accuracy of Brake Attachment Surfaces
Ensure that the concentricity (X) of the centering mark and shaft and
the perpendicularity (Y) of the brake mounting surface and shaft do SERIES

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

not exceed allowable values. ELECTROMAGNETIC-
ACTUATED MICRO
CLUTCHES & BRAKES
Concentricity (X) Perpendicularity (Y)
Size
T.I.R. [mm] T.I.R. [mm] ELECTROMAGNETIC-
ACTUATED
06 0.3 0.04
CLUTCHES & BRAKES
08 0.3 0.05
ELECTROMAGNETIC
10 0.4 0.05 CLUTCH & BRAKE
12 0.4 0.06 UNITS

14 0.6 0.06
SPRING-ACTUATED
16 0.6 0.07 BRAKE

Y A ELECTROMAGNETIC
TOOTH CLUTCHES

X A
BRAKE MOTORS

POWER SUPPLIES

MODELS

BXW

BXR

BXL

BXH

BXL(N)

351
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXL Models
Specifications
Static Coil (at 20℃ ) Lead wire Max. Rotating part Allowable Total Armature
Heat Armature
friction rotation moment of braking braking release Mass

Size
Model Voltage Wattage Current Resistance resistance UL pull-in time
torque Size speed inertia energy rate energy time [kg]
[V] [W] [A] [Ω] class style ta [s]
Ts [N·m] [min-1] J [kg·m2] Pbaℓ [W] ET [J] tar [s]

DC24 15 0.63 38.4 F

BXL-06-10 06 2 DC45 12 0.27 169 F UL3398 AWG22 5000 3.75 × 10 − 5 58.3 2.0 × 107 0.035 0.020 0.9
DC90 12 0.13 677 F

DC24 22.5 0.94 25.6 F

BXL-08-10 08 4 DC45 19 0.41 110 F UL3398 AWG18 5000 6.25 × 10 − 5 91.7 3.5 × 107 0.040 0.020 1.3

DC90 19 0.21 440 F

DC24 28 1.14 21.1 F

BXL-10-10 10 8 DC45 25 0.54 83.0 F UL3398 AWG18 4000 13.75 × 10 − 5 108.3 6.2 × 107 0.050 0.025 2.3

DC90 25 0.27 331 F

DC24 35 1.46 16.5 F
BXL-12-10 12 16 UL3398 AWG18 3600 33.75 × 10 − 5 133.3 9.0 × 107 0.070 0.030 3.4
DC90 30 0.33 271 F

DC24 39 1.64 14.6 F

BXL-16-10 16 22 UL3398 AWG18 3000 7.35 × 10 − 4 183.3 11.4 × 107 0.100 0.035 5.4
DC90 39 0.43 207 F
* Depending on the initial torque characteristics, break-in to condition the engaging surfaces may be required.
* The armature pull-in time and armature release time are taken during DC switching.
* See the operating characteristics page for the armature pull-in time and release time during AC-side switching (half-wave rectified).

Dimensions
K
U
M
N a b P9 2-T
°
20
3-1
(H: Case depth)

+0.5
0
t
P.C.D. B

P.C.D. C
φD H9

J L
φA

φD
φE

r
φd H7

0°
F
□

12
3-

S
3-φR
I 30°
Lead wire length: 400
Unit [mm]
Size A B C D r E F H I J K L M N R S T U a d b t
06 83 73 73 28 R1 26.5 22 3 10 20.5 39.5 14 33.6 20 4.5 9 2 − M5 30° 0.15 11 4 1.5

08 96 86 86 35 R1 32 25 3 12 20 41 17 35 20.8 5.5 10.5 2 − M5 30° 0.15 14 5 2

10 116 104 104 42 R1 38 30 3 9.5 21 47.5 25 41 25.3 6.5 12.5 2 − M6 30° 0.2 19 6 2.5

12 138 124 124 50 R1 45 35 4 12 19 49.8 30 43.5 23.3 6.5 12.5 2 − M6 30° 0.2 24 8 3

16 158 142 143 59 R1 55 45 4 14 22.5 57.5 35 51 27.7 9 15.5 2 − M8 40° 0.25 28 8 3

How to Place an
BXL -06-10G 24V 11DIN
Order
Size Bore diameter (dimensional symbol d)
Option number Voltage (Specifications table)
10: Standard
*Contact Miki Pulley for assistance with bore diameters, d, not listed in the Dimensions tables and voltages not listed in the Specifications table.

352
 353
COUPLINGS
Options
ETP BUSHINGS
Made to Order
ELECTROMAGNETIC
■ Release Lever CLUTCHES & BRAKES

Option No.: 12 Release lever position SPEED CHANGERS

In addition to the manual release tap of & REDUCERS
U
the standard product, we also offer an G
O V INVERTERS
optional manual release lever. See the M
dimensions table below for the N a

Y
dimensions of brakes with release levers. LINEAR SHAFT DRIVES

P
Please contact Miki Pulley for other

S
b P9

(H: Case depth)

specification values. TORQUE LIMITERS

+0.5
0
t
P.C.D. B

P.C.D. C
φD H9

φd
φA

φD
φE
J L ROSTA

F
□

0°
SERIES

12
°

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

3-
60 ELECTROMAGNETIC-
ACTUATED MICRO
3-φR Lead wire length: 400 CLUTCHES & BRAKES
I 30°
ELECTROMAGNETIC-
K
ACTUATED
Unit [mm]
CLUTCHES & BRAKES
Model A B C D E F G H I J K L M N O P Q R Y U V S a d b t
ELECTROMAGNETIC
BXL-06-12 83 73 73 28 26.5 22 42.4 3 10 20.5 49.5 14 33.7 20 2.6 88 24 4.5 64 73 16 9 0.15 11 4 1.5 CLUTCH & BRAKE
BXL-08-12 96 86 86 35 32 25 44 3 12 20 51 17 35 20.8 2.9 122 27 5.5 95 85 20 10.5 0.15 14 5 2 UNITS

BXL-10-12 116 104 104 42 38 30 51.2 3 9.5 21 57.5 25 41 25.3 3.2 162.5 32.5 6.5 130 103 28 12.5 0.2 19 6 2.5 SPRING-ACTUATED
BXL-12-12 138 124 124 50 45 35 56.4 4 12 19 64.8 30 43.5 23.3 5 200 40 6.5 160 121 36 12.5 0.2 24 8 3 BRAKE

BXL-16-12 158 142 143 59 55 45 64.9 4 14 22.5 72.5 35 51 27.7 6 230 44 9 186 140 36 15.5 0.25 28 8 3
ELECTROMAGNETIC
TOOTH CLUTCHES
Rotor
■ Quiet Mechanism (Silencing Spring) Rotor hub
Option No.: S1 BRAKE MOTORS

There is a extremely small structural backlash (see figure on the right)

between the rotor and the rotor hub. In applications that are prone to
POWER SUPPLIES
microvibrations of the drive shaft such as single-phase motors, this
backlash may produce rattling (banging). The silencing spring for the
rotor hub reduces this rattling.
Silencing
spring
■ Quiet Mechanism (Pull-in Noise Reduction Mechanism)
Option No.: S2
When the brake is energized, a magnetic circuit is formed, and the ■ List of Option Numbers
armature is pulled to the stator by that magnetic force. At that time,
Silencing spring +
the armature touches the magnetic pole of the stator and a noise is Description of No quiet
Silencing spring Pull-in noise reduction
options mechanism
produced. This sound (pull-in noise) is reduced by putting shock mechanism
absorbing material in the stator's magnetic pole part. No release lever 10 10S1 10S2
In option S2, in addition to the pull-in noise reduction mechanism, the Has release lever 12 12S1 12S2
silencing spring (option S1) is also supplemented. * Option 10 uses standard specifications. MODELS

BXW

BXL-06- 12S1G 24V 11DIN BXR

Option no.
BXL

BXH

BXL(N)

353
To download CAD data or product catalogs: www.mikipulley.co.jp Web code C019
0000
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXL Models
Items Checked for Design Purposes

■ Precautions for Handling ■ Accuracy of Brake Attachment Surfaces

Ensure that the concentricity (X) of the centering mark and shaft and
■ Brakes
the perpendicularity (Y) of the brake mounting surface and shaft do
Most electromagnetic braking systems are made using flexible
not exceed the following allowable values.
materials. Be careful when handling such parts and materials as
striking or dropping them or applying excessive force could cause Size
Concentricity (X) Perpendicularity (Y)
T.I.R. [mm] T.I.R. [mm]
them to become damaged or deformed.
06 0.4 0.04
■ Lead Wires 08 0.4 0.05
Be careful not to pull excessively on the brake lead wires, bend them at 10 0.4 0.05
sharp angles, or allow them to hang too low.
12 0.6 0.06

16 0.6 0.07

■ Precautions for Mounting Retaining ring

■ Affixing the Rotor Hub
Affix the rotor hub to the shaft with bolts, snap rings, or the like such
that the rotor hub does not touch the armature or stator.

■ Mounting the Brake Key

Implement screw-locking measures such as use of an adhesive thread-

locking compound to bolts and screws used to install brakes. If using a Bolt

spring washer to prevent loosening, use a conical spring washer, and

ensure that it does not contact the armature.

■ Shafts Shaft
retainer A
The shaft tolerance should be h6 or js6 class (JIS B 0401).
X A
Shaft

Bolt

Y A

354
 355
COUPLINGS
■ Precautions for Use ■ Recommended Power Supplies and Circuit
■ Environment Protectors ETP BUSHINGS
These brake units are dry braking systems, meaning that the torque
Recommended power supplies
will drop if oil residue, moisture, or other liquids get onto friction ELECTROMAGNETIC
Input AC power Brake voltage Rectification Brake size Recommended power
method supply model CLUTCHES & BRAKES
surfaces. Lead wires are not oil resistant. Consider using a cover or Single-phase,
AC100V 50/60Hz DC24V 06,08,10 BES-20-71-1
other protection when using in an environment exposed to oil, cutting full-wave SPEED CHANGERS
Single-phase,
AC100V 50/60Hz DC24V full-wave 12,16 BES-20-72-1
oil, etc. & REDUCERS
AC100V 50/60Hz DC45V Single-phase, 06,08,10 BEW-1R
half-wave
■ Power Supply Voltage Fluctuations AC100V 50/60Hz DC90V
Single-phase,
06,08,10,12,16 BEW-1R INVERTERS
full-wave
Full braking performance may not be guaranteed with extreme AC200V 50/60Hz DC24V
Single-phase,
06,08,10 BES-20-71
full-wave
changes in power supply voltage. Make sure to keep power supply AC200V 50/60Hz DC24V
Single-phase,
12,16 BES-20-72 LINEAR SHAFT DRIVES
full-wave
voltage to within ± 10% of the rated voltage value. Single-phase,
AC200V 50/60Hz DC90V half-wave 06,08,10,12,16 BEW-2R

■ Operating Temperature * A DC power supply such as a battery can also be used to supply the 24 V DC required for the brake TORQUE LIMITERS
voltage.
The operating temperature is -10°C to 40°C (no freezing or condensation).
If you will use the product at other temperatures, consult Miki Pulley. Recommended circuit protectors ROSTA

Input voltage Brake Rectification Recommended circuit protector (varistor)

voltage method
■ Manual Release
DC24V DC24V ー TND07V-820KB00AAA0 or an equivalent
BXL models can be released manually. SERIES
Single-phase,
AC100V 50/60Hz DC45V half-wave TND07V-221KB00AAA0 or an equivalent

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

Alternately tighten screws in two or three of the tap holes on the plate Single-phase,
ELECTROMAGNETIC-
AC100V 50/60Hz DC90V TND07V-221KB00AAA0 or an equivalent ACTUATED MICRO
to press the armature. full-wave
Single-phase, CLUTCHES & BRAKES
AC200V 50/60Hz DC90V TND07V-471KB00AAA0 or an equivalent
The screw tips will push against the armature and release it with about half-wave
* The above-model varistors are manufactured by Nippon Chemi-Con Corporation. ELECTROMAGNETIC-
a 90°rotation. Do not force the screws in more than that. The plate * DC24V indicates a product recommended with a stepdown transformer or the like. ACTUATED
may become deformed and the brake may become unreleasable. CLUTCHES & BRAKES
Included varistors
ELECTROMAGNETIC
■ Release Lever (Optional) Brake voltage Included varistors CLUTCH & BRAKE
The brake can be released even when not energized using an optional UNITS
DC24V TND07V-820KB00AAA0 or an equivalent
release lever.
DC45V No varistor provided SPRING-ACTUATED
However, using a lever does not result in drag torque becoming zero.
DC90V No varistor provided BRAKE
Avoid applying more force than necessary to a release lever.
During operation, always check that a release lever is disengaged.
ELECTROMAGNETIC
TOOTH CLUTCHES
■ Air Gap Adjustment
BXL models do not require air gap adjustment. The brake air gap is
adjusted when the braking system is shipped from the factory. When BRAKE MOTORS

first used, no gap adjustment is needed, so do not rotate the nut.

■ Initial Torque POWER SUPPLIES

The torque may be lower than the indicated value at initial use. In such
cases, run it to break in the frictional surface before use.

■ Circuit Protectors
If using a power supply that is not equipped with a circuit protector for
DC switching, make sure to connect the recommended circuit
protector device in parallel with the brake.

MODELS

BXW

BXR

BXL

BXH

BXL(N)

355
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXH Models
Specifications
Static Coil (at 20℃ ) Lead wire Max. Rotating part Allowable Total
Heat Armature Armature
friction rotation moment of braking braking Mass

Size
Model Voltage Wattage Current Resistance resistance UL pull-in time release time
torque Size speed inertia energy energy [kg]
[V] [W] [A] [Ω] class style ta [s] tar [s]
Ts [N·m] [min-1] J [kg·m2] Ebaℓ [J] ET [J]

DC24 15 0.63 38.4 F

BXH-06-10 06 4 DC45 12 0.27 169 F UL3398 AWG22 5000 3.25 × 10 − 5 700 2.0 × 106 0.040 0.020 0.9
DC90 12 0.13 677 F

DC24 22.5 0.94 25.6 F

BXH-08-10 08 8 DC45 19 0.41 110 F UL3398 AWG18 5000 5.75 × 10 − 5 1100 3.5 × 106 0.045 0.020 1.3

DC90 19 0.21 440 F

DC24 28 1.14 21.1 F

BXH-10-10 10 16 DC45 25 0.54 83 F UL3398 AWG18 4000 1.30 × 10 − 4 1300 6.2 × 106 0.070 0.025 2.3

DC90 25 0.27 331 F

DC24 35 1.46 16.5 F
BXH-12-10 12 32 UL3398 AWG18 3600 3.20 × 10 − 4 1600 9.0 × 106 0.090 0.025 3.4
DC90 30 0.33 271 F

DC24 39 1.64 14.6 F

BXH-16-10 16 44 UL3398 AWG18 3000 6.93 × 10 − 4 2200 11.4 × 106 0.125 0.030 5.4
DC90 39 0.43 207 F
* The armature pull-in time and armature release time are taken during DC switching.
* See the operating characteristics page for the armature pull-in time and release time during AC-side switching (half-wave rectified).

Dimensions
K
U
M V
0°

N a b P9 T
12
3-
(H: Case depth)

+0.5
0
t
P,C,D. B

P,C,D. C
φDH9

J L
φA

φD
φE

r
φd H7

0°
F
□

12
3-

S
3-φR
I 30°
Lead wire length: 400
Unit [mm]
Size A B C D r E F H I J K L M N R S T U V a d b t

06 83 73 73 28 R1 26.5 22 3 10 20.5 39.5 14 33.6 20 4.5 9 2 − M5 30° − 0.15 11 4 1.5

08 96 86 86 35 R1 32 25 3 12 20 41 17 35 20.8 5.5 10.5 2 − M5 30° − 0.15 14 5 2

10 116 104 104 42 R1 38 30 3 9.5 21 47.5 25 41 25.3 6.5 12.5 2 − M6 30° − 0.2 19 6 2.5
12 138 124 124 50 R1 45 35 4 12 19 49.8 30 43.5 23.3 6.5 12.5 4 − M6 30° 45 ゜ 0.2 24 8 3

16 158 142 143 59 R1 55 45 4 14 22.5 57.5 35 51 27.7 9 15.5 4 − M8 40° 40 ゜ 0.25 28 8 3

How to Place an BXH-06-10G 24V 11DIN

Order Size Bore diameter (dimensional symbol d)
Option number Voltage (Specifications table)
10: Standard
*Contact Miki Pulley for assistance with bore diameters, d, not listed in the Dimensions tables and voltages not listed in the Specifications table.

356
 357
COUPLINGS
Options
ETP BUSHINGS
Made to Order
ELECTROMAGNETIC
■ Release Lever CLUTCHES & BRAKES

Option No.: 12 Release lever position SPEED CHANGERS

In addition to the manual release tap & REDUCERS
U
of the standard product, we also offer G
O V INVERTERS
an optional manual release lever. See M
the dimensions table below for the N a

Y
dimensions of brakes with release levers. LINEAR SHAFT DRIVES

P
Please contact Miki Pulley for other

S
b P9

(H: Case depth)

specification values. TORQUE LIMITERS

+0.5
0
t
P.C.D. B

P.C.D. C
φD H9

φd
φA

φD
φE
J L ROSTA

F
□

0°
SERIES

12
°

3-

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

60 ELECTROMAGNETIC-
ACTUATED MICRO
3-φR Lead wire length: 400 CLUTCHES & BRAKES
I 30°

K ELECTROMAGNETIC-
ACTUATED
Unit [mm] CLUTCHES & BRAKES
Model A B C D E F G H I J K L M N O P Q R Y U V S a d b t ELECTROMAGNETIC
BXH-06-12 83 73 73 28 26.5 22 42.8 3 10 20.5 49.5 14 33.7 20 2.9 105 24 4.5 81 73 20 9 0.15 11 4 1.5 CLUTCH & BRAKE
UNITS
BXH-08-12 96 86 86 35 32 25 45.4 3 12 20 56 17 35.3 20.8 4 122 27 5.5 95 85 20 10.5 0.2 14 5 2
BXH-10-12 116 104 104 42 38 30 53.9 3 9.5 21 63 25 42.2 25.3 4.5 162.5 32.5 6.5 130 103 28 12.5 0.25 19 6 2.5 SPRING-ACTUATED
BRAKE
BXH-12-12 138 124 124 50 45 35 58.3 4 12 19 70 30 45.4 23.3 5 200 40 6.5 160 121 36 12.5 0.25 24 8 3

BXH-16-12 158 142 143 59 55 45 66.5 4 14 22.5 72.5 35 53.3 27.7 6 230 44 9 186 140 36 15.5 0.25 28 8 3
ELECTROMAGNETIC
TOOTH CLUTCHES

■ Quiet Mechanism (Silencing Spring)

BRAKE MOTORS
Option No.: S1 Rotor
There is a extremely small structural backlash (see figure on the right) Rotor hub
between the rotor and the rotor hub. In applications that are prone to POWER SUPPLIES
microvibrations of the drive shaft such as single-phase motors, this
backlash may produce rattling (banging). The silencing spring for the
rotor hub reduces this rattling.

Silencing
spring

■ List of Option Numbers

Description of options No quiet mechanism With silencing spring

No release lever 10 10S1

MODELS
Has release lever 12 12S1
BXW
* Option 10 uses standard specifications.

BXR

BXH-06-12S1G 24V 11DIN BXL

Option no. BXH

BXL(N)

357
To download CAD data or product catalogs: www.mikipulley.co.jp Web code C020
0000
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXH Models
Items Checked for Design Purposes

■ Precautions for Handling

■ Brakes ■ Accuracy of Brake Attachment Surfaces
Most electromagnetic braking systems are made using flexible Ensure that the concentricity (X) of the centering mark and shaft and
materials. Be careful when handling such parts and materials as the perpendicularity (Y) of the brake mounting surface and shaft do
striking or dropping them or applying excessive force could cause not exceed the following allowable values.
them to become damaged or deformed.
Concentricity (X) Perpendicularity (Y)
Size
T.I.R. [mm] T.I.R. [mm]
■ Lead Wires
06 0.4 0.04
Be careful not to pull excessively on the brake lead wires, bend them at
sharp angles, or allow them to hang too low. 08 0.4 0.05
10 0.4 0.05

12 0.6 0.06
■ Precautions for Mounting 16 0.6 0.07
■ Affixing the Rotor Hub
Affix the rotor hub to the shaft with bolts, snap rings, or the like such Retaining ring

that the rotor hub does not touch the armature or stator.

■ Mounting the Brake

Implement screw-locking measures such as use of an adhesive thread- Key
locking compound to bolts and screws used to install brakes. If using a
spring washer to prevent loosening, use a conical spring washer, and
Bolt
ensure that it does not contact the armature.

■ Shafts
The shaft tolerance should be h6 or js6 class (JIS B 0401).
Shaft
retainer A

X A
Shaft

Bolt

Y A

358
 359
COUPLINGS
■ Precautions for Use ■ Recommended Power Supplies and Circuit
■ Holding use Protectors ETP BUSHINGS
These brakes are holding brakes. Do not use them for ordinary braking, Recommended power supplies
except for emergency braking in the event of a power outage or the Rectification Recommended ELECTROMAGNETIC
Input AC power Brake voltage Brake size power supply model
method
like. Single-phase, CLUTCHES & BRAKES
AC100V 50/60Hz DC24V full-wave 06,08,10 BES-20-71-1
SPEED CHANGERS
■ Environment AC100V 50/60Hz DC24V Single-phase,
full-wave
12,16 BES-20-72-1
Single-phase, & REDUCERS
These brake units are dry braking systems, meaning that the torque AC100V 50/60Hz DC45V
half-wave
06,08,10 BEW-1R
will drop if oil residue, moisture, or other liquids get onto friction Single-phase,
AC100V 50/60Hz DC90V full-wave 06,08,10,12,16 BEW-1R INVERTERS
surfaces. Lead wires are not oil resistant. Consider using a cover or AC200V 50/60Hz DC24V Single-phase, 06,08,10 BES-20-71
full-wave
other protection when using in an environment exposed to oil, cutting AC200V 50/60Hz DC24V
Single-phase,
12,16 BES-20-72 LINEAR SHAFT DRIVES
full-wave
oil, etc. AC200V 50/60Hz DC90V
Single-phase,
06,08,10,12,16 BEW-2R
half-wave
■ Power Supply Voltage Fluctuations * A DC power supply such as a battery can also be used to supply the 24 V DC required for the brake TORQUE LIMITERS
voltage.
Full braking performance may not be guaranteed with extreme
changes in power supply voltage. Make sure to keep power supply Recommended circuit protectors ROSTA
voltage to within ± 10% of the rated voltage value. Input voltage Brake Rectification Recommended circuit protector (varistor)
voltage method
DC24V DC24V ー TND07V-820KB00AAA0 or an equivalent
■ Operating Temperature SERIES
AC100V 50/60Hz Single-phase,
DC45V TND07V-221KB00AAA0 or an equivalent
T h e o pera ting tempera tur e is -10°
C t o 40°C ( n o f r e e zin g o r half-wave

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
AC100V 50/60Hz DC90V Single-phase, TND07V-221KB00AAA0 or an equivalent
condensation). If you will use the product at other temperatures, full-wave ACTUATED MICRO
Single-phase,
consult Miki Pulley. AC200V 50/60Hz DC90V half-wave TND07V-471KB00AAA0 or an equivalent CLUTCHES & BRAKES
* The above-model varistors are manufactured by Nippon Chemi-Con Corporation. ELECTROMAGNETIC-
■ Manual Release * DC24V indicates a product recommended with a stepdown transformer or the like.
ACTUATED
BXH models can be released manually. CLUTCHES & BRAKES
Included varistors
Alternately tighten screws in two or three of the tap holes on the plate ELECTROMAGNETIC
Brake voltage Included varistors
to press the armature. CLUTCH & BRAKE
DC24V TND07V-820KB00AAA0 or an equivalent UNITS
The screw tips will push against the armature and release it with about
a 90°rotation. Do not force the screws in more than that. The plate DC45V No varistor provided
SPRING-ACTUATED
may become deformed and the brake may become unreleasable. DC90V No varistor provided BRAKE

■ Release Lever (Optional) ELECTROMAGNETIC

The brake can be released even when not energized using an optional TOOTH CLUTCHES
release lever.
However, using a lever does not result in drag torque becoming zero. BRAKE MOTORS
Avoid applying more force than necessary to a release lever.
During operation, always check that a release lever is disengaged.
POWER SUPPLIES
■ Air Gap Adjustment
BXH models do not require air gap adjustment. The brake air gap is
adjusted when the braking system is shipped from the factory. When
first used, no gap adjustment is needed, so do not rotate the nut.

■ Circuit Protectors
If using a power supply that is not equipped with a circuit protector for
DC switching, make sure to connect the recommended circuit
protector device in parallel with the brake.

MODELS

BXW

BXR

BXL

BXH

BXL(N)

359
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXL(N) Models
Specifications
Static Coil（at 20℃） Max. Rotating part Allowable Total Armature Armature Applicable
Heat
friction rotation moment of braking energy braking pull-in release motor output Mass

Size
Model Voltage Wattage Current Resistance resistance
torque speed inertia rate energy time time (Reference) ［kg］
［V］ ［W］ ［A］ ［Ω］ class
T［N・m］
s ［min − 1］ J［kg・m2］ Pbal［W］ ET［J］ ta［s］ tar [s] Four poles [kW]

24 19.0 0.793 30.3 F

BXL-08-10N-002 08 2 99 19.0 0.192 515.8 F 3600 6.3 × 10 − 5 60.0 5.0 × 107 0.030 0.050 0.1/0.2 1.4
171 19.0 0.111 1539 F

24 19.0 0.793 30.3 F

BXL-08-10N-004 08 4 99 19.0 0.192 515.8 F 3600 6.3 × 10 − 5 60.0 5.0 × 107 0.040 0.040 0.4 1.4
171 19.0 0.111 1539 F

24 28.0 1.166 20.6 F

BXL-10-10N-008 10 8 99 28.0 0.283 350.0 F 3600 13.8 × 10 − 5 70.0 8.0 × 107 0.050 0.050 0.75 2.7
171 28.0 0.164 1044 F

24 28.0 1.166 20.6 F

BXL-10-10N-015 10 15 99 28.0 0.283 350.0 F 3600 13.8 × 10 − 5 70.0 8.0 × 107 0.070 0.030 1.5 2.7

171 28.0 0.164 1044 F

24 35.0 1.460 16.4 F

BXL-12-10N-022 12 22 99 35.0 0.353 280.1 F 3600 33.8 × 10 − 5 90.0 12.0 × 107 0.080 0.060 2.2 4.7

171 35.0 0.205 835.5 F

24 35.0 1.460 16.4 F

BXL-12-10N-030 12 30 99 35.0 0.353 280.1 F 3600 33.8 × 10 − 5 90.0 12.0 × 107 0.100 0.030 3.0 4.7

171 35.0 0.205 835.5 F

24 42.0 1.753 13.7 F

BXL-16-10N-040 16 40 99 42.0 0.424 233.3 F 1800 73.5 × 10 − 5 120.0 16.0 × 107 0.100 0.070 3.7 6.3

171 42.0 0.246 696.1 F

24 55.0 2.294 10.5 F

BXL-16-10N-060 16 60 99 55.0 0.556 178.1 F 1800 74.6 × 10 − 5 150.0 16.0 × 107 0.100 0.050 5.5 6.7
171 55.0 0.322 531.6 F
24 55.0 2.294 10.5 F

BXL-16-10N-080 16 80 99 55.0 0.556 178.1 F 1800 74.6 × 10 − 5 150.0 16.0 × 107 0.100 0.030 7.5 6.7
171 55.0 0.322 531.6 F
*The armature pull-in time and armature release time are taken during DC switching.

Dimensions
K K
M Type 1 M Type 2
N b P9 N b P9
＋0.5

＋0.5
0

0
t

t
φD H8
φD H8
φA

φA
φB

φB
φG

φG
φE

φE

J L J L
φd H8

φd H8
0°

F F
12

□ □
°

a 3-S a 4-S
0
3-φR

4-φR

-9
4

T° T°
I Lead wire ＵＬ３３９８ ＡＷＧ１８ I Lead wire ＵＬ３３９８ ＡＷＧ１８
Length: 400mm Length: 400mm

Unit [mm]

Model Type A B D E F G I J K L M N R S T a d b t

BXL-08-10N-002 1 94 85 35 32 25 35 9 24 45.7 17 40.7 24 5.5 12 30 0.3 11 4 1.5

BXL-08-10N-004 1 94 85 35 32 25 35 9 24 45.7 17 40.7 24 5.5 12 30 0.3 14 5 2

BXL-10-10N-008 1 124 110 40 38 30 42 10 22 48.7 25 42.7 26 6.5 12 30 0.3 18 6 2.5

BXL-10-10N-015 1 124 110 40 38 30 42 10 22 48.7 25 42.7 26 6.5 12 30 0.3 20 6 2.5

BXL-12-10N-022 1 150 130 49 45 35 50 18 25 57.1 30 51.1 29 6.5 14 30 0.3 24 8 3

BXL-12-10N-030 1 150 130 49 45 35 50 18 25 57.1 30 51.1 29 6.5 14 30 0.3 24 8 3

BXL-16-10N-040 1 165 150 62 55 45 62 18 24 63.1 35 55.1 28 9 15 30 0.3 28 8 3

BXL-16-10N-060 2 165 150 64 61 50 64 20 29 68.1 35 60.1 33 9 15 15 0.3 37 10 3.5

BXL-16-10N-080 2 165 150 64 61 50 64 20 29 68.1 35 60.1 33 9 15 15 0.3 37 10 3.5

How to Place an
BXL-08-10N-004-24V-11
Order
Size Bore diameter (dimensional symbol d)
Static torque (refer to the Voltage (refer to the specifications table)
specifications table)

*Contact Miki Pulley for assistance with bore diameters, d, not listed in the Dimensions tables and voltages not listed in the Specifications table.

360
 361
COUPLINGS
Options
ETP BUSHINGS

■ Plate Installation Stator Armature

ELECTROMAGNETIC
CLUTCHES & BRAKES
Standard installation is performed using stator installation, but a plate
SPEED CHANGERS
installation specification is also available as an option. Please contact
& REDUCERS
Miki Pulley for assistance if desiring to use plate installation.
Rotor
INVERTERS
■ Quiet Mechanism
Plate
There is a slight backlash between the rotor and the rotor hub. The LINEAR SHAFT DRIVES
armature may also strike the surface of the magnetic poles on the stator
when electricity flows, generating a noise. There is a quiet mechanism
TORQUE LIMITERS
available that works to suppress such clattering noises as well as
Rotor hub
operating noise. Please contact Miki Pulley for details.
ROSTA

Items Checked for Design Purposes SERIES

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
■ Precautions for Handling ■ Precautions for Mounting ACTUATED MICRO
CLUTCHES & BRAKES
■ Brakes ■ Affixing the Rotor Hub
ELECTROMAGNETIC-
Most electromagnetic braking systems are made using flexible Affix the rotor hub to the shaft with bolts, snap rings, or the like
ACTUATED
materials. Be careful when handling such parts and materials as such that the rotor hub does not touch the armature or stator. CLUTCHES & BRAKES
striking or dropping them or applying excessive force could cause ■ Mounting the Brake ELECTROMAGNETIC
them to become damaged or deformed. Implement screw-locking measures such as use of an adhesive CLUTCH & BRAKE
■ Lead Wires thread-locking compound to bolts and screws used to install UNITS

Be careful not to pull excessively on the brake lead wires, bend brakes. If using a spring washer to prevent loosening, use a conical SPRING-ACTUATED
them at sharp angles, or allow them to hang too low. spring washer, and ensure that it does not contact the armature. BRAKE

■ Shafts
■ Precautions for Use The shaft tolerance should be h6 or js6 class (JIS B 0401).
ELECTROMAGNETIC
TOOTH CLUTCHES
■ Environment ■ Accuracy of Brake Attachment Surfaces
These brake units are dry braking systems, meaning that the
Ensure that the concentricity (X) of the centering mark and shaft
torque will drop if oil residue, moisture, or other liquids get onto BRAKE MOTORS
and the perpendicularity (Y) of the brake mounting surface and
friction surfaces. Lead wires are not oil resistant. Consider using a
shaft do not exceed allowable values.
cover or other protection when using in an environment exposed
Ｘ A
POWER SUPPLIES
to oil, cutting oil, etc.
Ｙ A
■ Operating Temperature
The operating temperature is from 0℃ to 40℃ (no freezing or
condensation). If you will use the product at other temperatures,
consult Miki Pulley.
■ Power Supplies
BXL-N models use commercial AC 220 V or 380 V single phase,
half-wave rectified. Select as appropriate for your application.
■ Power Supply Voltage Fluctuations
Full braking performance may not be guaranteed with extreme
A
changes in power supply voltage. Make sure to keep power supply
voltage to within ± 10% of the rated voltage value.
■ Air Gap Adjustment
BXL-N models do not require air gap adjustment. The brake air gap MODELS

is adjusted when the braking system is shipped from the factory. BXW
■ Circuit Protectors Allowable concentricity and perpendicularity values for the
BXL-N Models BXR
If using a power supply for separate DC switching, make sure to
connect the recommended circuit protector device in parallel with BXL
Concentricity (X) Perpendicularity (Y)
the brake. Size
T.I.R.［mm］ T.I.R.［mm］ BXH
08 0.4 0.05
BXL(N)
10 0.4 0.05
12 0.6 0.05

16 0.6 0.05

■ Recommended Power Supplies and Circuit Protectors

Frequency Input AC voltage DC output voltage Recommended circuit protectors *2
Model Rectification method
［Hz］ ［V］ *1［V］ (Varistor)

BEM-2T Single-phase, half-wave 50/60 AC220 DC99 TND07V-221KB00AAA0 or an equivalent

BEM-4T Single-phase, half-wave 50/60 AC380 DC171 TND14V-821KB00AAA0 or an equivalent
*1 The values given are for when there is electricity flowing to the brake coil.
*2 The above-model varistors are manufactured by Nippon Chemi-Con Corporation.

361
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

Selection Procedure for Brakes for Braking

Consideration of Required Torque to Brake Loads

1 To select the appropriate brake size, you must find the torque required for braking T, and then select a size of brake that delivers a greater torque than T.

● Consideration of cases when load

P: Motor output [kW]
conditions are not clearly known 9550×P nr: Brake shaft rotation speed [min − 1]
When load conditions are unclear, assuming that the
TM = × η [N・m]
motor has been selected correctly for the load, the
nr η : Transmission efficiency from motor to brake

approximate torque can be obtained from the motor

output using the following equation. J: Total moment of inertia of load side
[kg·m2]
● Consideration when load conditions
can be clearly ascertained
J×n ＋ Tℓ ×K [N・m]
n: Rotation speed [min−1]
T= − tab: Actual braking time [s]
When load conditions can be clearly ascertained,
9.55×tab Tℓ: Load torque [N•m]
the torque T required for braking can be found K: Safety factor (see table below)
using the following equation.
The sign of load torque Tℓ is minus when the load works in the direction that Load state Factor
assists braking and plus when it works in the direction that hinders braking. The Low-inertia/low-frequency constant load 1.5
actual braking time tab is the time required from the start of braking torque Ordinary use with normal inertia 2
generation until braking is complete. When this is not clearly known at the High-inertia/high-frequency load fluctuation 3
selection stage, a guideline value is used that factors in service life and the like.

Provisional Size Selection Select a brake of a size for which the torque T found in the equation of step 1 satisfies the following equation.

2 A brake of a size for which torque T found from the equations above satisfies the following equation must be selected.

Tb > T (or TM) [N•m] Tb: Brake torque [N•m] * For brake torque, treat Ts as equaling Tb. (Ts: Static friction torque from specifications table)

Consideration of Energy

3 When the load required for braking is sufficiently small, the size can be selected considering only torque T as described above. Given the
effects of heat generated by braking, however, the following equation must be used to confirm that the operation frequency per unit
time and the total number of operations (service life) meet the required specifications.
2
Use the following equation to find the energy Eb required for J×n Tb
a single braking operation.
Eb = × [J]
182 Tb ＋
− Tℓ
The sign of load torque Tℓ is plus when the load works in the direction that assists braking and minus when it works in the direction that hinders braking.

● Confirm the frequency S of operations that can

be performed per minute
60×Pbaℓ Pbaℓ : Allowable braking energy rate [W]
Find the frequency of operations that can be performed S= [times/min] Eb : Energy required for one braking
per minute using the equation at right to confirm that Eb
the desired operation frequency is sufficiently smaller operation [J]
than the value found.
● Confirm the total number of operations (service life)
ET
Find the total number of operations (service life) using L= [times] ET: Total braking energy [J]
the equation at right, and then check that it meets the Eb
desired service life.

Consideration of Braking Time

4 When there are limits on the time required to decelerate or

stop the load, use the equation at right to confirm that the
total braking time ttb satisfies requirements.
ttb = tid ＋tar ＋tab
tar: Armature release time [s]
tid: Initial delay time [s]

Here, actual braking time tab is the time from the start of J×n [s]
braking torque generation to the completion of braking. tab =
Find it with the following equation.
9.55×（Tb ＋
− Tℓ）
The sign of load torque Tℓ is plus when the load works in the direction that assists braking and minus when it works in the direction that hinders braking.

Consideration of Stopping Precision

5 To confirm stopping precision, find the stopping angle

(rotation) using the following equation.
1
θ= 6×n× tid＋tar＋ ー tab [°
2
]
tar: Armature release time [s]
tid: Initial delay time [s]

The variation in stopping precision--i.e., stopping precision

⊿θ --can be found empirically with the following equation ⊿θ= ±0.15×θ [°
]
and used as a guide.

362
 363
Selection Procedure for Brakes for Holding COUPLINGS

ETP BUSHINGS

ELECTROMAGNETIC
Consideration of Required Torque to Hold Loads
CLUTCHES & BRAKES

1 Use the following equation to find the torque T required to hold a load while stationary.

T=Tℓ max × K [N•m]

Load state Factor
SPEED CHANGERS
& REDUCERS
Low inertia/small load fluctuations 1.5
Tℓ max: Max. load torque [N•m] INVERTERS
Ordinary use with normal inertia 2
K: Safety factor (see table at right)
High inertia/large load fluctuations 3
LINEAR SHAFT DRIVES

Provisional Selection of Size TORQUE LIMITERS

2 A brake of a size for which torque T found from the equations above satisfies the following equation must be selected.

Ts > T [N•m] Ts: Static friction torque of brake [N•m]

ROSTA

SERIES

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
Consideration of Energy ACTUATED MICRO

3 When considering a brake with the objective of holding loads, braking is limited to emergency braking.
Use the following equation to find the braking energy Eb for a single operation required for emergency braking. You must confirm that
CLUTCHES & BRAKES
ELECTROMAGNETIC-
ACTUATED
this result is sufficiently smaller than the allowable braking energy Ebaℓ of the selected brake. Dedicated for holding brakes cannot CLUTCHES & BRAKES
effect emergency braking. ELECTROMAGNETIC
2
J: Total moment of inertia on load side [kg·m2] CLUTCH & BRAKE
J×n Tb n: Rotation speed [min − 1] UNITS
Eb = × [J] Tb: Brake torque [N·m]
182 Tb ＋
− Tℓ Tℓ max: Max. load torque [N•m] SPRING-ACTUATED
BRAKE
The sign of maximum load torque Tℓ max is plus when the load works in the direction that assists braking and minus when it works in
the direction that hinders braking.
ELECTROMAGNETIC
Eb ≪ Ebaℓ [J] TOOTH CLUTCHES
When using brakes for holding and the specification is indicated by allowable braking energy rate Pbaℓ , check under the following
conditions.
BRAKE MOTORS
Eb ≪ 60 × Pbaℓ [J]

POWER SUPPLIES
Consideration of Number of Operations

4 The total number of braking operations (service life) when performing emergency braking L must be found using the following
equation to confirm that required specifications are satisfied.

ET
L= [times] ET: Total braking energy [J]
Eb
Note that the frequency of emergency braking will also vary with operating environment; however, it should be about once per minute
or better. When the braking energy of a single operation Eb is 70% or more of the allowable braking energy Ebaℓ , however, allow the
brake to cool sufficiently after emergency braking before resuming use.

MODELS

BXW

BXR

BXL

BXH

BXL(N)

363
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXW/BXR/BXL/BXH Models
■ Consideration of Torque
Selection Exa
ample
mple
e1
The torque required for braking is calculated from the above
specifications, compared to the dynamic friction torque in the catalog,
■ Braking Brakes Used in Raising Loads and the appropriate brake size is selected.

• Calculating the inertial moment converted to brake shaft inertial

moment JB
１Ｇ Ｍ Ｂ We use the following equation to calculate the moment of inertia
converted to the brake shaft (motor shaft) moment of inertia
１ JB[kg•m2]. Here, R represents the ratio of the motor rotation speed to
the load shaft rotation speed.

JB=JM＋（J1＋J2＋J3＋JA）×R2 [kg・m2]
Ｗ JB=6×10−3＋（1.5×10−2＋1.5×10−2＋4.30＋15.67）
×（60/1800）2
≒2.8×10−2[kg・m2]
Selection of a brake to brake the load is as follows, as the above figure
illustrates. • Calculating the load torque converted to brake shaft load torque Tℓ
We use the following equation to calculate the load torque
Motor (brake shaft) rotation speed n 1800 [min-1]
converted to the brake shaft (motor shaft) load torque Tℓ [N•m].
Load shaft rotation speed n1 60 [min-1]
However, η indicates the transmission efficiency, which is 0.85 in
Moment of inertia of motor-side gear J1 1.5 × 10 − 2 [kg•m2]
this selection.
Moment of inertia of load-side gear J2 1.5 × 10 − 2 [kg•m2]
Moment of inertia of load-side drum J3 4.30 [kg·m2] Tℓ=R×T/η [N・m]
Moment of inertia of motor with speed reducer JM 6 × 10-3 [kg•m2] Tℓ=60/1800×62.5/0.85≒2.45 [N・m]
Moment of inertia of load JA 15.67 [kg·m2]
Load-side torque T 62.5 [N•m] • Calculating the torque required for braking T
Number of braking operations of brake L 53,000 cycles or more Use the following equation to calculate the torque required for
Brake operating frequency S 0.1 [cycles/min] braking T [N•m].
* The number of braking operations and operation frequency treat one ascending operation and one Here, the conditions are set as follows.
descending operation together as one cycle. * The guideline for actual braking time tab is 2.0 [s].
* The number of braking operations of the brake is treated as 6 (operations/h) × 8 (h/day) × 365 * The sign of load torque TR is minus when ascending because the load works in the direction that
(days/year) × 3 (years). assists braking and plus when descending because the load works in the direction that hinders
braking.
* Select a safety factor K of 3.0, based on operating conditions.

Ascending

JB ×n
Tup= −Tℓ ×K
9.55×tab

2.8×10−2×1800
Tup= −2.45 ×3.0≒0.57［N・m］
9.55×2.0
Descending

JB ×n
TDOWN = ＋Tℓ ×K
9.55×tab

2.8×10−2×1800
TDOWN = ＋2.45 ×3.0≒15.3［N・m］
9.55×2.0

Since the result of the above shows that required torque is 15.3 [N•m],
check the specifications in the catalog and select size 12 (dynamic
friction torque of 16.0 [N•m]) of the BXL models of brakes for braking.

364
 365
■ Consideration of Energy • Calculating the total number of operations (service life) COUPLINGS

Confirm that the brake selected based on required torque satisfies the Substituting in the just-calculated energy required for a single
required specifications for number of braking operations and braking braking Eb and the BXL-12 total frictional energy ET (catalog value of ETP BUSHINGS

frequency. 9.0 × 107 [J]), we arrive at the total number of operations L.

ELECTROMAGNETIC
• Calculating the total moment of inertia J If the energy of a single cycle of ascending and descending Eb is: CLUTCHES & BRAKES
Adding the inertial moment converted to brake shaft inertial Eb= Ebup＋EbDOWN SPEED CHANGERS
moment JB that was just calculated to the inertial moment of the & REDUCERS
Eb＝1032［J］
rotating parts of the provisionally selected BXL-12 (catalog value of
33.75 × 10 − 5), we arrive at the total moment of inertia. The total number of operations L is: INVERTERS

J = 2. 8×10−2 ＋33.75×10 −5 ET
≒2.83×10−2[kg・m 2 ] L= LINEAR SHAFT DRIVES
Eb
• Calculating the amount of energy required for one braking operation Eb TORQUE LIMITERS
9.0×107
The calculated total moment of inertia is used to calculate the L=
energy required by a single braking operation. Here, the sign of load 1032
ROSTA
torque Tℓ is plus when ascending because the load works in the ≒ 87209 [cycles]
direction that assists braking and minus when descending because
the load works in the direction that hinders braking. The desired total number of operations is fewer than the calculated SERIES
total number of operations (service life), so the specification is satisfied.

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
Ascending
ACTUATED MICRO
87,209 [cycles] > 53,000 [cycles] CLUTCHES & BRAKES
J×n2 Tb ELECTROMAGNETIC-
Ebup= × ■ Consideration of Braking Time ACTUATED
182 Tb＋Tℓ
Total braking time ttb is calculated as the sum of actual braking time CLUTCHES & BRAKES
2.83×10−2×18002 16.0 tab, armature release time tar, and the initial delay time from start of ELECTROMAGNETIC
Ebup= ×
182 16.0＋2.45 command input to start of operating input tid. CLUTCH & BRAKE
Here, the actual braking time is expected to be greater in the UNITS
≒437［J］
descending direction, so only the case of descending is considered. SPRING-ACTUATED
Descending The sign of the load torque Tℓ is minus, since it is in the direction that BRAKE
impedes braking.
J×n2 Tb
EbDOWN= × J×n
ELECTROMAGNETIC
182 Tb−Tℓ tab = TOOTH CLUTCHES
9.55×（Tb−Tℓ）
2.83×10−2×18002 16.0
EbDOWN= × 2.83×10−2×1800
182 16.0−2.45 tab = BRAKE MOTORS
9.55×（16.0−2.45）
≒595［J］
≒0.39[s]
• Confirm the frequency S of operations that can be performed per POWER SUPPLIES

minute Here, the armature release time tar of the BXL-12 from the catalog is
Substitute the energy required for a single braking Eb calculated 0.03 [s]. The initial delay time tid is the delay of the operation of relays
above and the allowable braking energy rate Pbaℓ for the BXL-12 and the like, so we use 0.05 [s], the typical relay operation time. Thus,
(catalog value 133.3 W) into the following equation and calculate the total braking time ttb is:
the frequency S of operations that can be performed per minute. ttb=0.05＋0.03＋0.39
Ascending ≒0.47［s］

60×Pbaℓ ■ Consideration of Stopping Precision

Sup=
Ebup When stopping precision (stopping distance) is restricted, calculate
60×133.3 stopping precision using the following equations.
Sup=
437 θ=6×n×（tid＋tar＋1/2×tab）
≒ 18.3 [times/min.] =2700[゜]
MODELS
Descending The variation in stopping precision--i.e., stopping precision ⊿θ --can
BXW
be found empirically with the following equation and used as a guide.
60×Pbaℓ
SDOWN= BXR
EbDOWN ⊿θ=＋
− 0.15×θ
60×133.3 =＋
− 405[゜]
BXL
SDOWN=
595 This angle is the angle at the brake shaft, so when the stopping BXH
precision θ max is 2700 + 405 = 3105 [°] and the drum diameter Dd is
≒ 13.4 [times/min.] BXL(N)
0.5 [m], the braking distance Bd of load W is:
The desired operation frequency is sufficiently smaller than the
calculated operation frequency, so the specification is satisfied. Note
Bd=θmax/360×R×π×Dd
that the braking energy rate (catalog value) used in the calculation is
=（3105/360）
×（60/1800）×π×0.5
=0.45[m]
the value under ideal conditions, so the desired operation frequency
needs to be sufficiently small. If there is no problem with the braking time and stopping precision,
BXL-12 can be selected.
13.4 [times/min.] ≫ 0.1 [times/min.]

365
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXW/BXR/BXL/BXH Models
Selection Exa
ample
mple
e2 ■ Consideration of Torque
The torque required for holding is calculated from the specifications at
left, compared to the static friction torque in the catalog, and the
■ Holding Brakes Used in Ball Screw Drive of Loads appropriate brake size is selected.
Ｗ • Calculating load torque converted to brake shaft load torque Tℓ
２
Use the following equation to calculate the load torque Tℓ [N•m].
Here, there is no external force F [N], gravitational acceleration g [m/
１ Ｍ Ｂ s2] is 9.8 [m/s2], R is the ratio of motor rotation speed to load shaft
rotation speed, and η is transmission efficiency, which in this
selection is 0.85.
Selection of a brake to brake the load is as follows, as the above figure
illustrates. Tℓ=R×1/2π×P×（F＋μMg）/η [N・m]

Motor (brake shaft) rotation speed n 1800 [min-1]

Tℓ=（900/1800）×1/2π×0.01×（0＋0.2×500×9.8）/0.85
Load shaft rotation speed nl 900 [min-1] ≒0.92[N・m]
Moment of inertia of motor JM 0.001 [kg·m2]

Mass of load M 500 [kg]

• Calculating the required holding torque T
Use the following equation to calculate the required holding torque
Lead of feed screw P 0.01 [m]
T. Here, safety factor K is 2.
Shaft diameter of feed screw D 0.05 [m]

Length of feed screw I 1 [m] T=Tℓ×K[N・m]

Friction coefficient of feed screw μ 0.2 T=0.92×2

≒1.84[N・m]
Since the result of the above shows that required torque is 1.84 [N•m],
check the specifications in the catalog and select size 06 (static friction
torque of 4.0 [N•m]) of the BXH models of brakes for holding.

366
 367
■ Consideration of Energy During Emergency Braking • Consideration of energy COUPLINGS

Brakes selected based on required holding torque are designed We calculate the braking energy per braking Eb required for
primarily for holding, so their braking operations are limited to emergency braking using the following equation. Here, the brake ETP BUSHINGS

emergency braking and the like. It is therefore necessary to check that torque Tb [N•m] is the catalog value of 4.0 [N•m] and the sign of the
ELECTROMAGNETIC
the braking energy per braking operation E b during emergency load torque Tℓ is plus, since it works in the direction that assists
CLUTCHES & BRAKES
braking does not exceed the allowable braking energy Ebaℓ . braking.
SPEED CHANGERS
• Calculating the moment of inertia of feed screws J・n2 Tb
Eb= × & REDUCERS
Given a feed screw whose shaft has a length of 1 [m], diameter of 182 Tb+Tℓ
0.05 [m], and specific gravity of 7.8, the feed screw moment of inertia 2.56×10−3×18002 4.0 INVERTERS
Eb= ×
JA [kg•m2] is: 182 4.0＋0.92

1 ≒37.1[J ] LINEAR SHAFT DRIVES

JA= ー×M×D2
8 Since the calculated braking energy Eb does not exceed the BXH-06's
1 TORQUE LIMITERS
= ー×（0.0252×π×1×7.8×1000）×0.052 allowable braking energy E baℓ (catalog value of 700 [ J]), the
8 specification is satisfied.
ROSTA

≒0.0048[kg・m ] 2 37.1 [J] < 700 [J]

• Calculating the moment of inertia of a linearly moving object SERIES

■ Consideration of Number of Operations

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

Use the following equation to calculate the moment of inertia Jx The total number of braking operations (service life) L when doing
ELECTROMAGNETIC-
[kg•m2] of a linearly moving object. ACTUATED MICRO
emergency braking can be found using the following equation. Here, CLUTCHES & BRAKES
M・P2 the BXH-06's total braking energy ET is the catalog value of 2.0 × 106 [J]. ELECTROMAGNETIC-
JX=JA＋
4π2 ACTUATED
500×0.012 ET
CLUTCHES & BRAKES
=0.0048＋ L=
4×π2 Eb
ELECTROMAGNETIC
CLUTCH & BRAKE
−3
≒6.1×10 [kg・m ] 2 2.0×106 UNITS
L=
37.1
• Calculating the total inertial moment converted to brake shaft SPRING-ACTUATED
≒ 53908 [times] BRAKE
inertial moment
The moment of inertia Jx [kg•m2] of a linearly moving object found With these specifications, BXH-06 can be selected.
ELECTROMAGNETIC
above is added to the moment of inertia of the rotating parts of the
Note that the frequency of emergency braking has a major impact on TOOTH CLUTCHES
provisionally selected BXH-06 (catalog value of 3.25 × 10 − 5
service life, so it should be about once per minute or better.
kg•m2) and the motor's moment of inertia JM [kg•m2] to calculate the
BRAKE MOTORS
total moment of inertia. Here, R represents the ratio of the motor
rotation speed to the load shaft rotation speed.
J=Jx×R2＋JM＋JB[kg・m2 ] POWER SUPPLIES

1 2
=6.1×10−3×（ ー ）＋0.001＋3.25×10−5
2
=2.56×10−3[kg・m2 ]

MODELS

BXW

BXR

BXL

BXH

BXL(N)

367
ELECTROMAGNETIC CLUTCHES & BRAKES SPRING-ACTUATED BRAKES

BXW/BXR/BXL/BXH Models
Operating Characteristics

■ Operating Time BXW Models Unit [s]

Type Voltage Size Switching tar ta

Operating

Operating
12V 01 0.015 0.008
Control

Control
input 24V 02 0.015 0.008

input

input

input
L type
45V 03 DC side 0.025 0.025
Excitation

(Braking use)
voltage

90V 04 0.030 0.030

180V 05 0.035 0.035
12V 01 0.010 0.010
Time
24V 02 0.010 0.010
H type
Initial delay time Initial delay time 45V 03 DC side 0.020 0.035
(tid) (tid) (Holding use)
90V 04 0.025 0.040
180V 05 0.030 0.045
01 0.010 0.025
Excitation
current

S type 02 0.010 0.030

(Dedicated for 24V 03 DC side 0.020 0.035
holding) 04 0.025 0.040
Armature release time Armature pull-in time Time
05 0.030 0.045
(tar) (ta)
01 0.020 0.035
80% of rated dynamic torque (Ti) R type
24V 03 DC side 0.020 0.050
(Holding use)
05 0.020 0.060
Damping torque
Torque

Dynamic Static 10% of rated torque (Tr)

friction friction BXR(LE) Models（Holding use） Unit [s]
torque torque
（Td） （Ts） Time Voltage Size Switching tar ta
Actual braking time (tab) Torque decaying time (td) 015 0.020 0.020
Drag torque Actual torque build-up time (tap) Release time (tre) 020 0.020 0.035
Torque build-up time (tp) 025 0.020 0.035
24V DC side
035 0.020 0.050
Driven
side 040 0.020 0.060
050 0.020 0.060
Rotation
speed

* Values using dedicated Miki Pulley controller.

Stop
* Switching is by the input side of the dedicated controller.
Braking time (tb) Time
Total braking time (ttb) BXR Models (Holding use) Unit [s]
Voltage Size Switching tar ta
tar: Armature release time 06 0.02 0.05
08 0.02 0.08
The time from when current shuts off until the armature returns to its
10 0.05 0.11
position prior to being pulled in and torque begins to be generated 24V DC side
12 0.03 0.12
14 0.03 0.12
tap: Actual torque build-up time 16 0.10 0.22

The time from when torque first begins to be generated until it BXL Models (Braking use) Unit [s]
reaches 80% of rated torque Voltage Size Switching tar tap tp ta
tp: Torque build-up time 06 0.020 0.015 0.035 0.035
24V 08 0.020 0.015 0.035 0.040
The time from when current flow is shut off until torque reaches 80% 45V 10 DC side 0.025 0.020 0.045 0.050
90V 12 0.030 0.025 0.055 0.070
of rated torque
16 0.035 0.030 0.065 0.100
ta: Armature pull-in time 06 0.110 0.035 0.145 0.035
08 0.110 0.040 0.150 0.040
45V
The time from when current flow first starts until the armature is pulled 10 AC side 0.150 0.060 0.210 0.050
90V
12 0.180 0.095 0.275 0.070
in and torque disappears
16 0.180 0.100 0.280 0.100

tid: Initial delay time

BXH Models (Holding use) Unit [s]
The time from start of command input to actuation input or release Voltage Size Switching tar ta
input to the main brake body 06 0.020 0.040
24V 08 0.020 0.045
45V 10 DC side 0.025 0.070
90V 12 0.025 0.090
16 0.030 0.125
06 0.070 0.040
08 0.080 0.045
45V
10 AC side 0.090 0.070
90V
12 0.120 0.090
16 0.140 0.125

BXL(N) Models (Braking use) Unit [s]

Voltage Size Switching tar ta
08-10N-002 0.050 0.030
08-10N-004 0.040 0.040
10-10N-008 0.050 0.050
24V 10-10N-015 0.030 0.070
99V 12-10N-022 DC side 0.060 0.080
171V 12-10N-030 0.030 0.100
16-10N-040 0.070 0.100
16-10N-060 0.050 0.100
16-10N-080 0.030 0.100

368
 369
COUPLINGS
Control Circuits
ETP BUSHINGS
■ 45 V, 90 V, and 96 V Specifications for BXW, BXR, BXL, and BXH Models (Single-phase
Half-wave Rectified) ELECTROMAGNETIC
CLUTCHES & BRAKES
■ AC-side Switching ■ DC-side Switching SPEED CHANGERS
This is the usual switching method. Connection is simple. This method achieves even faster operational characteristics than & REDUCERS
AC-side switching.
INVERTERS
Switch Diode
Diode Switch
Circuit protector

LINEAR SHAFT DRIVES

100 V AC

Circuit protector
Diode

Circuit protector
or Brake 100 V AC

Diode
200 V AC or Brake TORQUE LIMITERS
200 V AC

ROSTA

SERIES
■ 12 V and 24 V Specifications for BXW, BXR, ■ 90 V, 96 V, 180 V, and 190 V Specifications

ELECTROMAGNETIC-ACTUATED CLUTCHES AND BRAKES

ELECTROMAGNETIC-
BXL, and BXH Models for BXW Models (Single-phase Full-wave ACTUATED MICRO
CLUTCHES & BRAKES
(Single-phase Full-wave Rectified) Rectified) ELECTROMAGNETIC-
■ DC-side Switching ■ DC-side Switching ACTUATED
CLUTCHES & BRAKES
Switch Switch ELECTROMAGNETIC
Transformer

Circuit protector

CLUTCH & BRAKE

Circuit protector
Rectifier

Circuit protector

Rectifier

Circuit protector
100 V AC UNITS
AC or
Brake 200 V AC Brake
SPRING-ACTUATED
BRAKE

■ Circuit Protectors ELECTROMAGNETIC

TOOTH CLUTCHES
If using a power supply that is not equipped with a circuit protector for
DC switching, make sure to connect the recommended circuit
protector device in parallel with the brake. However, with some circuit BRAKE MOTORS

protectors, operation times may lengthen. In such cases, we

recommend use of varistors.
POWER SUPPLIES
Select varistors from the following table based on brake size and AC
voltage before rectification.
Note that the 24 V specifications of BXL and BXH as well as all BXR
models are supplied with varistors. See Included varistors for each
model.

Pre-rectification voltage
Brake size Recommended varistor model
[V]

AC 30 or below TND07V-820KB00AAA0 or an equivalent

Over AC 30 to AC 110 or below TND07V-221KB00AAA0 or an equivalent
01 ∼ 18
Over AC 110 to AC 220 or below TND07V-471KB00AAA0 or an equivalent
Over AC 220 to AC 460 or below TND14V-821KB00AAA0 or an equivalent

AC 30 or below TND14V-820KB00AAA0 or an equivalent

MODELS
Over AC 30 to AC 110 or below TND14V-221KB00AAA0 or an equivalent
20 ∼ 25
Over AC 110 to AC 220 or below TND14V-471KB00AAA0 or an equivalent BXW
Over AC 220 to AC 460 or below TND14V-821KB00AAA0 or an equivalent
BXR
* The above-model varistors are manufactured by Nippon Chemi-Con Corporation.
BXL

BXH

BXL(N)

369