Contents

Function and Areas of Application page 2

Typical Application page 4

Sprag and Roller Ramp Freewheels page 5

Calculation of Torques and Selection of Freewheel Sizes page 6

Maximum life page 7

Series FB page 8

Series FBF page 9

Series BD page 10

Series FRS, FRX, FRZ page 11

Series BA and BC page 12

Series BA page 13

Series FXM page 14

Series FGR A2-A3 and A3-A4 page 16

Series FA and FAA page 17

Series ZZ and FC page 18

Series FCN page 19

Series FSN page 20

Cage Freewheels (Series BWX) page 21

Technical Points page 22

Questionnaire for the selection of freewheels page 27

We are constantly striving to improve

our products and we therefore reserve
the right to change designs or dimen-
sions. This revised catalogue replaces
all previous issues.

1
Function and Areas of Application

Freewheel Function l Operating safety verter and successive planetary gearing is a

l Economics case in point.
Freewheels are machine elements with unique l Higher degree of automatisation.
characteristics :
In the one direction of rotation By no means do these advantages create
l No driving contact between inner and higher costs; on the contrary : the application
outer ring; the freewheel is freewheel- of freewheels leads to reduced costs com-
ing; (Fig. 1) pared with solutions using separately con-
trolled couplings or brakes as there are no
In the other direction of rotation control costs.
l Driving contact between inner and outer For some designs the application of free-
ring; in this direction it is possible to wheels would be the one and only economical
transmit a high torque. (Fig. 1) solution. For example, automatic motor trans-
missions with hydro-pneumatic torque con-
The characteristics allow freewheels to fulfil
various functions completely automati-
free locked
cally in the most diverse machines. No
mechanical or hydraulic operating equipment
is needed, as is the case with couplings or
brakes for example

Freewheels are used as

l Indexing freewheels
l Overrunning couplings
l Backstops.
RINGSPANN ELECON freewheels are an es-
sential design element in the plant & ma-
chine. The freewheel as an automatic driving inner ring
element is preferred to conventional outer ring
solutions because of its decisive advantages
offered in respect of driving component
(rollers, sprags 1

Application as Indexing
Freewheel
The RINGSPANN ELECON Indexing Free-
wheel replaces the older pawl type freewheel
because it is precise and noiseless in its
operation and permits a fine setting of the
feed path. For example, it is used
l In material feed installations on dies, forg-
ing presses and wire processing ma-
chines, (Fig. 2 & 3)
l For producing fine feeds in packing, pa-
per processing, printing and textile
machines,
l As a reduction gear, possibly with fine
setting for the reduction, in sowing (drilling)
machines, continuous-heating furnaces,
printing machines an high-voltage cur-
rent controls,
l For automatic compensation for wear in 2 3
brakes,
l As feed installation in planing, shaping
and grinding machines.

2
Function and Areas of Application

Application as
Overrunning Clutch
When used as an overrunning coupling, the
RINGSPANN ELECON freewheel effects an
automatic interruption of the connection be-
tween coupled machines and components if
the direction of force changes. In many cases
it can replace a clutch, e.g. :
l In barring / auxiliary drives it disengages
the barring / auxiliary drive motor from the
main motor as soon as this is switched on;
l In starters it disconnects the starter motor
from the internal combustion engine as
soon as this has started; (Fig. 4)
l In gears and planetary gearings it takes
over the function of clutches and brakes;
l With two freewheels one can construct a
two-speed drive without change speed
clutch. This design is used in agitator
drives for example, achieving a total of driving overrunning overrunning driving
four speeds by using a two-speed motor;
l In ventilators and blowers it disconnects 4
the driven parts from the drive that is
switched off, and allows the gyrating mass
of the ventilator to overrun the drive;
l In the powered roller beds of rolling mills,
continuous-heating furnaces and conveyor
installations, the freewheel allows the load
to overrun the driving speed of the rollers;
l In multimotor drives it allows the automatic
disengagement of the non-driving motors.
(Fig. 5)

Application
as Backstop
When used as a backstop the RINGSPANN
ELECON Freewheel distinguishes itself by its
safe function and the immediate and steady
response. Following are some application
examples:
l In inclined conveyors and elevators, to
prevent the conveyor load from running
back when the motor is switched off or in
case of power failure; (Fig. 6 & 7)
l In pumps, blowers and ventilators, to
prevent reverse running due to the pres-
sure from the flow medium after switching
off ;
l In or on gears, electric motors and gear
motors for the drive of conveyor installa-
tions to prevent reverse running after
switching off;
l In mobile equipment with electric drive -
compressors, for example - to prevent
starting in the wrong direction of rotation;
l In torque converters, to hold the guide
wheel during converter operation;
l In controllable planetary gears as torque
6 7
reaction point;
l In cranes, winches, building elevators and
other lifting equipment.

3
Typical Applications

BACKSTOPPING

Inclined Conveyors Gear Boxes

Elevators

The backstop prevents In drives of conveyor

the material being systems the backstop
conveyed from running prevents the system
back in the event of from running back
current failure or when when shut off.
the motor is shut off.
8 9

Pumps Electric Motors

Blowers Geared Motors
Fans

The backstop prevents The backstops pre-

these turning back vents these from
when reverse pressure starting up in the
is exerted by the load. wrong direction of ro-
tation.

10 11

INDEXING
Packaging conveyor Punching Machine

When the bell crank In order to ensure

rotates, the indexing equal feed lengths in-
lever moves back and dependent of variation
forth. The positive en- of thickness, hardness
gagement of the sprags or bend radius of the
in the clutch results in strip, freewheels with
positive linear motion P-grinding are used in
control. punching machine.
12
13

OVERRUNNING

High Inertia Drive Main Engine and Barring / Auxiliary drive

When the drive is

started, the clutch
engages auto-
matically and ro-
tates the high in-
ertia load. When
the drive is shut
down, the drive
can stop, saving
wear and tear on
the drive compo- 14
nents. The high
inertia load continues to rotate as the clutch is in the freewheeling
mode. 15

Freewheel as an overrunning clutch between main engine and barring

/ auxiliary drive. With normal use the freewheel inner ring overruns
and the borring drive is disengaged. The barring drive is from the
coupling to the outer ring via the freewheel, for the engine shaft.

4
Sprag Freewheels and
Roller Ramp Freewheels

Two different Designs

of Freewheels

16 17

The Sprag Freewheel has outer and inner The Roller Ramp Freewheel is equipped
rings with cylindrical races. Arranged in be- with roller ramps on either the inner or the
tween are the individually sprung sprags. The outer ring, the other ring having a cylindrical
drive mode is free from slip. Due to varying race. The individually sprung rollers are arranged
sprag shapes several types are possible and in between. The drive mode operates free
can be supplied for : from slip.
l high torques
l high indexing accuracy
l noncontact overrunning operation

Effect of the
Sprag Freewheel
The forces Fi and FA which, because of the Therefore, the transmissible circumferential
equilibrium of forces are equal, act on the line force is
of application which connects the two points
of contact. The radial forces Fi and FA can be FTI = FNi tan εi
separated into the normal forces FNI and FNA With the sprag arrangement shown in ill-18
as well as into the tangential forces FTI and the outer ring of the freewheel can be turned
FTA. freely in a clockwise direction. By turning the
The line of application forms the clamping outer ring - again, with the inner ring fixed - in
angle εi opposite the radius R1. To achieve the opposite direction, the self-gripping effect
automatic clamping the tangent of the clamp- is produced. The sprags are trapped without
ing angle must be smaller than the friction slip between the races. In this direction it is
value µ. possible to transmit a high torque.
FTI
tan εi = ≤µ
FNI
18

Effect of the
Roller Ramp Freewheel
RINGSPANN ELECON Roller Ramp Free- In respect of the ratio of forces, the same
wheels are built with an inner star or outer logic applies as for sprag freewheels.
star. ill. 19 shows such a freewheel with an
inner star. With the built-in version shown
here, the outer ring can be rotated freely in a
clockwise direction. Turning the outer ring in
the opposite direction produces the clamping
effect. The rollers are trapped without slip
between the outer ring and inner star.

19

5
Calculation of torque and
Selection of Backstop Sizes

Transmissible Torque
The calculation of the transmissible torque
assumes an accurate knowledge of the
geometrical relation between the outline of
the sprag and the freewheel races.
With a sprag freewheel with cylindrical in-
ner and outer races, the formula for the
inner clamping angle is as follows (see
ill. 20) :
Ra c2 - (Ri + ri - Ra + ra)2
tan εi = (Ri + ri) (Ra - ra)
Ra–Ri
When calculating the transmissible torque
it is also necessary to take into consider-
ation the elastic deformations of the free-
wheel rings. These deformations are cre-
ated by the large radial forces which the
sprags exert on the rings during the locking
process. This requires the solving of differ-
ential equations which describe the relation
between pressures and deformations in
the rings. The distribution of hertzian sur-
face pressure on the contact points be- l Hertzian pressure on the contact points factor 2. The transmissible torques calcu-
tween sprags and races is represented by l Limit of clamping angle lated according to the above method are
l Tangential stress in the rings therefore twice as high table values.
Fourier's series and inserted in the differ-
l Position angle of sprag.
ential equation as a boundary condition.
Subject to continuously increasing forces Also considered in the calculation is the
the geometric values, deformations and effect of eccentric races. The calculation
pressures are calculated and compared also provides the torsion characteristic of
with the permitted limit values by using an the freewheel (see ill. 21) which is particu-
iteration method. The following limits must larly relevant for the dynamic calculations
be observed : of the whole installation. The nominal
torques MN in the table contain a safety

Selection of Freewheel Size

There are many applications using indexing MA = K.ML The operating factor K depends on the charac-
freewheels and overrunning clutches where teristics of the driving and processing machine.
The Symbol in the equation below mean.:
dynamic processes occur which create high It can lie between 1.25 and 4 - the general rules
peak torques. Together with length of operat- MA = selection torque of freewheel in machine design apply. We also know of ap-
ing life and maximum speed, these peak plications where the operating factor K can have
K = Operating Factor [1]
torques represent a deciding factor in the a value as high as 20 like the direct drive of
selection process of the freewheel. ML = load torque with freewheel asynchronous electric motors coupled with rub-
rotating at constant speed. ber-elastic couplings, for example.
The safest method of predicting a maximum ML = 9550 PL/nfrl [Nm]
The operating period is an important factor in
peak torque is to carry out an exact
PL = nominal power of driving the selection of the correct freewheel because
osscillation calculation of the whole system.
machine [kW] of the variations in design and purpose to
However, this does assume that amongst
choose from RINGSPANN Elecon offers a
other data the rotational mass and torsional nfrl = speed of freewheel [r.p.m]
comprehesive choice to satisfy the require-
rigidity of the various elements of the system
ments for maximum operating life (page 7). The
are known. In many cases such a calculation After calculating the freewheel size is se-
maximum speed must also be given due con-
would be too complicated. Then the design lected according to the catalogue table so
sideration when selecting a freewheel. Again,
torque MA of the freewheel must be that the following applies:
design and construction play a major role.
determined thus.
MN > MA If you are uncertain regarding the correct se-
lection, please contact us with exact details of
MN = nominal torque of freewheel the installation and the operating conditions,
in [Nm] according to the tables preferably by sending us the completed ques-
in this catalogue. tionnaire on page 27 of this catalogue.

6
Maximum Life

P-Grinding
It is the P-grinding which given the sprag is retained, which is vital for function-
RINGSPANN ELECON Sprag Freewheel its ing. The sprags remain functional despite
outstanding quality as an indexing element. wear.
The outer track of the sprag is not circular
ground but polygon shaped. This effects the The P-grinding is used in the indexing free-
distance between the outer race and inner wheels because it not only gives a longer life
race to differ at various points of the circum- but also improves the indexing accuracy con-
ference. As the sprags move slowly in a siderably.
circumferential direction during operation, their
wedging angle changes continually. The line
of contact on the sprag keeps changing back
and forth between the points a and b. This
ensures that the wear on the sprag is spread 22
over a greater area, but the contour of the

RIDUVIT-Sprags
RINGSPANN ELECON sprags are manufac- findings of tribology research. RIDUVIT sprags
tured from chromium steel, as used for ball are used in overrunning clutches and in-
and roller bearings. The high pressure resis- creases the operating life considerably.
tance, elasticity and resiliance of this material
is necessary for the sprags during the locked
stage. During freewheeling, however, all
depends on maximum resistance to wear at
the contact points sprag/inner ring. All these
requirements are fulfilled to maximum effect by
a chromium steel sprag with RIDUVIT coating.
The RIDUVIT coating gives the sprag a hard-
metal type wear resistance. The technology
applied here is based on the most recent

Centrifugal Lift-Off Z
Centrifugal lift-off Z is used with overrunning turned the sprag anti-clockwise and located
clutches in the cases when the outer ring of it against the outer ring thus creating the
the freewheel rotates at high speed during clearance a; the freewheel is operating with-
the overrunning function (freewheeling) and out contact. When the speed of the outer ring
when the speed is low during driving. During drops sufficiently to reduce the effect of the
the overrunning function (freewheeling) the centrifugal force onto the sprag to less than
centrifugal force Fc causes the sprags to lift the spring force, the sprag returns to the inner
from the inner race. Therefore, neither fric- ring and the freewheel is ready to lock. For
tion nor wear occurs giving a similar life ill. 23 this the driving speed should not exceed 40%
shows as RINGSPANN ELECON freewheel of the lift-off speed.
with centrifugal lift-off Z during freewheeling
operation. The centrifugal force Fc acting 23
upon the centre of gravity S of the sprag has

Centrifugal Lift-Off X
Centrifugal lift-off X (DBP and foreign Pat- force Fc has turned the sprag clockwise and
ents) is used in overrunning clutches in the located it against the support ring. This has
cases when the inner ring of the freewheel created the clearance a between the sprag
(shaft) rotates at a high speed during the and the outer race. The freewheel operates
overrunning function (freewheeling) and when without contact.
the speed is low during driving. Here the
When the speed of the inner ring has dropped
centifugal force Fc cause the sprag to lift off
sufficiently to reduce the effect of the centrifu-
the outer race during freewheeling. In this
gal force onto the spring force, the sprag
operating condition the freewheel operates
returns to its location on the outer ring and
without friction, i.e. with limitless life.
the freewheel is ready to lock. The driving
ill. 24 shows a RINGSPANN ELECON speed during this should not exceed 40% of
freewheel with centrifugal lift-off X during the lift-off speed.
freewheeling. The sprags and the support
24
ring rotate with the inner ring. The centrifugal

7
Series FB
Freewheels for interfaced screw connections

Freewheel FB 72 centrifugal lift–off type Z with shaft

hub and spigot as overrunning coupling on a fast
running ventilator shaft. The design with the shaft hub
adaptor was chosen to suit the existing large shaft
diameter. A smaller freewheel could be used and would
still be sufficient from a torque point of view. During
normal operation (fast running ventilator shaft) the free-
wheel overruns and the centrifugal lift–off Z is effective.
With the barring drive, the motor drives the ventilator
shaft at low speed via the V–belt and the locked
25 26
freewheel by use of the stub shaft adaptor.

Size 24 to 270 Size 340 to 440

Z = number of fixing holes

for screws G on pitch
circle T
27

Standard Type with RIDUVIT Type with centrifugal lift-off Z Type with centrifugal lift-off X
type P-grinding type (outer ring overrunning) (shaft overrunning)

Type Torque Type Torque Type Torque Type Torque Lift-off Type Torque Lift-off
speed speed
Nm Nm Nm Nm r.p.m Nm r.p.m
FB 24 CF 45 FB 24 CFP 19 FB 24 CFT 45 – – – – – –
FB 29 CF 80 FB 29 CFP 31 FB 29 CFT 80 – – – – – –
FB 37 SF 200 FB 37 SFP 120 FB 37 SFT 200 FB 37 CZ 110 850 – – –
FB 44 SF 320 FB 44 SFP 180 FB 44 SFT 320 FB 44 CZ 180 800 FB 44 DX 130 860
FB 57 SF 630 FB 57 SFP 310 FB 57 SFT 630 FB 57 LZ 430 1400 FB 57 DX 460 750
FB 72 SF 1250 FB 72 SFP 630 FB 72 SFT 1250 FB 72 LZ 760 1220 FB 72 DX 720 700
FB 82 SF 1800 FB 82 SFP 750 FB 82 SFT 1800 FB 82 SFZ 1700 1450 FB 82 DX 1000 670
FB 107 SF 2500 FB 107 SFP 1250 FB 107 SFT 2500 FB 107 SFZ 2500 1300 FB 107 DX 1500 610
FB 127 SF 5000 FB 127 SFP 3100 FB 127 SFT 5000 FB 127 SFZ 5000 1200 FB 127 SX 3400 380
FB 140 SF 10000 FB 140 SFP 6300 FB 140 SFT 10000 FB 140 SFZ 10000 950 FB 140 SX 7500 320
FB 200 SF 20000 FB 200 SFP 12500 FB 200 SFT 20000 FB 200 SFZ 20000 680 FB 200 SX 23000 240
FB 270 SF 40000 FB 270 SFP 25000 FB 270 SFT 40000 FB 270 SFZ 37500 600 FB 270 SX 40000 210
FB 340 SF 80000 FB 340 SFP 50000 FB 340 SFT 80000 FB 340 SFZ 80000 540 – – –
FB 440 SF 160000 FB 440 SFP 100000 FB 440 SFT 160000 FB 440 SFZ 160000 470 – – –

Freewheel Bore d Max D F G H L T Z Weight

size Standard mm mm mm mm mm mm mm mm Kg
FB 24 12 14* – – – 14* 62 1 M 5 8 50 51 3 0.9
FB 29 15 17* – – – 17* 68 1 M 5 8 52 56 3 1.1
FB 37 14 16 18 20 22* 22* 75 0.5 M 6 10 48 65 4 1.3
FB 44 20 22 25* – – 25* 90 0.5 M 6 10 50 75 6 1.9
FB 57 25 28 30 32* – 32* 100 0.5 M 8 12 65 88 6 2.8
FB 72 35 38 40 42* – 42* 125 1 M 8 12 74 108 12 5.0
FB 82 35 40 45 50* – 50* 135 2 M 10 16 75 115 12 5.8
FB 107 50 55 60 65* – 65* 170 2.5 M 10 16 90 150 10 11
FB 127 50 60 70 75* – 75* 200 3 M 12 18 112 180 12 19
FB 140 65 75 80 90 – 95* 250 5 M 16 25 150 225 12 42
FB 200 110 120 – – – 120 300 5 M 16 25 160 270 16 62
FB 270 140 – – – – 150 400 6 M 20 30 212 360 18 150
FB 340 180 – – – – 240 500 7.5 M 20 35 265 450 24 275
FB 440 220 – – – – 300 630 7.5 M 30 40 315 560 24 510
Keyways to DIN 6885/p1. Bores marked * have keyways to DIN 6885/p.3. keyway width: tolerance grade IT10. The table torques are nominal torques and contain
a safety factor of 2. Freewheels with standard bores are available immediately. Other bore diameters made to order.
Selection of size and speeds : Direction of rotation : Installation :
The freewheel size is selected according to rec- Please provide the following details when ordering Freewheels of the type FB are supplied complete
ommendations on page 6; details of indexing freewheel sizes FB 340 and FB 440 with oil filling for installation. Tolerance of the shaft
frequencies, max. speeds and operating life on 1. direction of rotation in driving mode as viewed should be h6 or j6. The centre line of application
pages 22–25 in direction X of force on the outer ring should–particularly in the
2. direction of force in driving mode: case as indexing freewheellie between the two ball
"outer ring drives inner ring" or "inner bearings, if at all possible.
ring drives outer ring"

8
Series FBF
Freewheels with mounting flange

Freewheel FBF 57 RIDUVIT type with brake

drum as load brake in lifting gears. When
lifting, the shaft turns in freewheeling direc-
tion. When stationary, the load is held by
the brake via the locked freewheel. When
lowering. the brake is released.

29 30

Size 24 to 270 Size 340 to 440

Z= number of fixing holes

for screws G on pitch
circle T
31 32

Standard Type with RIDUVIT Type with centrifugal lift-off Z Type with centrifugal lift-off X
type P-grinding type (outer ring overrunning) (shaft overrunning)
Lift-off Lift-off
Type Torque Type Torque Type Torque Type Torque Type Torque
speed speed
Nm Nm Nm Nm r.p.m Nm r.p.m
FBF 24 CF 45 FBF 24 CFP 19 FBF 24 CFT 45 – – – – – –
FBF 29 CF 80 FBF 29 CFP 31 FBF 29 CFT 80 – – – – – –
FBF 37 SF 200 FBF 37 SFP 120 FBF 37 SFT 200 FBF 37 CZ 110 850 – – –
FBF 44 SF 320 FBF 44 SFP 180 FBF 44 SFT 320 FBF 44 CZ 180 800 FBF 44 DX 130 860
FBF 57 SF 630 FBF 57 SFP 310 FBF 57 SFT 630 FBF 57 LZ 430 1400 FBF 57 DX 460 750
FBF 72 SF 1250 FBF 72 SFP 630 FBF 72 SFT 1250 FBF 72 LZ 760 1220 FBF 72 DX 720 700
FBF 82 SF 1800 FBF 82 SFP 750 FBF 82 SFT 1800 FBF 82 SFZ 1700 1450 FBF 82 DX 1000 670
FBF 107 SF 2500 FBF 107 SFP 1250 FBF 107 SFT 2500 FBF 107 SFZ 2500 1300 FBF 107 DX 1500 610
FBF 127 SF 5000 FBF 127 SFP 3100 FBF 127 SFT 5000 FBF 127 SFZ 5000 1200 FBF 127 SX 3400 380
FBF 140 SF 10000 FBF 140 SFP 6300 FBF 140 SFT 10000 FBF 140 SFZ 10000 950 FBF 140 SX 7500 320
FBF 200 SF 20000 FBF 200 SFP 12500 FBF 200 SFT 20000 FBF 200 SFZ 20000 680 FBF 200 SX 23000 240
FBF 270 SF 40000 FBF 270 SFP 25000 FBF 270 SFT 40000 FBF 270 SFZ 37500 600 FBF 270 SX 40000 210
FBF 340 SF 80000 FBF 340 SFP 50000 FBF 340 SFT 80000 FBF 340 SFZ 80000 540 – – –
FBF 440 SF 160000 FBF 440 SFP 100000 FBF 440 SFT 160000 FBF 440 SFZ 160000 470 – – –

Freewheel Bore d Max A D F G L N T Z Weight

size Standard mm mm mm mm mm mm mm mm mm Kg
FBF 24 12 14* – – – 14* 85 62 1 M 5 50 10 72 3 1.1
FBF 29 15 17* – – – 17* 92 68 1 M 5 52 11 78 3 1.3
FBF 37 14 16 18 20 22* 22* 98 75 0. 5 M 5 48 11 85 8 1.5
FBF 44 20 22 25* – – 25* 118 90 0. 5 M 6 50 12 104 8 2.3
FBF 57 25 28 30 32* – 32* 128 100 0. 5 M 6 65 12 114 12 3.2
FBF 72 35 38 40 42* – 42* 160 125 1 M 8 74 14 142 12 5.8
FBF 82 35 40 45 50* – 50* 180 135 2 M10 75 16 155 8 7
FBF 107 50 55 60 65* – 65* 214 170 2. 5 M10 90 18 192 10 12.6
FBF 127 50 60 70 75* – 75* 250 200 3 M12 112 20 225 12 21.4
FBF 140 65 75 80 90 – 95* 315 250 5 M16 150 22 280 12 46
FBF 200 110 120 – – – 120 370 300 5 M16 160 25 335 16 68
FBF 270 140 – – – – 150 490 400 6 M20 212 32 450 16 163
FBF 340 180 – – – – 240 615 500 7. 5 M24 265 40 560 18 300
FBF 440 220 – – – – 300 775 630 7. 5 M30 315 50 710 18 564
Keyways to DIN 6885/p1. Bores marked * have keyways to DIN 6885/p.3. keyway width: tolerance grade IT10. The table torques are nominal torques and contain
a safety factor of 2. Freewheels with standard bores are available immediately. Other bore diameters made to order.

Selection of size and speeds : Direction of rotation : Installation :

The freewheel size is selected according to Please provide the following details with your order. Freewheels of the type FBF are supplied complete
recommendations on page 6; details of in- 1. direction of rotation in driving mode as with oil filling for installation. Tolerance of the shaft
dexing frequencoes, max. speeds and oper- viewed in direction X should be h6 or j6. The centre line of application
2. direction of force in driving mode: of force on the outer ring should–particularly in the
ating life on pages 22 and 25 "outer ring drives inner ring" or "inner case as indexing freewheeling between the two
ring drives outer ring" ball bearings, if at all possible.

9
Series BD
for front-face screw connection
Sprag Type
Freewheel BD 45 SX with V–belt pulley
used as overruning clutch on the shaft end
of a main drive. The outer part with V–belt
pulley remains stationary when the main
drive is running. With auxiliary drive the
installation is driven slowly via the V–belt
pulley and the locked freewheel.

33
34

Z = number of fixing holes

for screws G on pitch
circle T
35

Type with centrifugal lift-off X Bore d B D F G H K L R S T Z

(Shaft overrunning)
With oil lubrication With grease lubrication
Lift-off Lift-off Standard min max
Type Torque Type Torque
speed speed
Nm r.p.m
Nm r.p.m
mm mm mm mm mm mm mm mm mm mm mm mm

BD 20 DX 420 750 BD 20 DXG 420 750 30 – – 20 30 65.5 106 0.75 M 6 26 5 77 70 2.5 90 6

BD 25 DX 700 700 BD 25 DXG 700 700 35 40 – 25 40 81.1 126 0.75 M 6 30 5 93 80 2.5 105 6
BD 30 DX 1250 630 BD 30 DXG 1250 630 45 50 – 30 50 88.5 151 0.75 M 8 36 6 102 100 4 130 6
BD 40 DX 1700 610 BD 40 DXG 1700 610 45 55 60 40 60 102.5 181 0.75 M 10 37 6 116 120 6.5 160 6
BD 45 SX 2300 400 BD 45 SXG 2300 400 55 65 70 40 70 115.5 196 1.25 M 12 38.5 6 130 130 8.5 170 8
BD 52 SX 5600 320 BD 52 SXG 5600 320 65 75 80 50 80 130.5 216 1.75 M 14 44.5 8 150 150 8.5 190 8
BD 55 SX 7700 320 BD 55 SXG 7700 320 75 85 90 50 90 146.5 246 1.75 M 14 48 10 170 160 6.5 215 8
BD 60 SX 14500 250 BD 60 SXG 14500 250 85 95 100 70 105 182.5 291 1.75 M 14 55 10 206 190 6.5 250 8
BD 70 SX 21000 240 BD 70 SXG 21000 240 120 – – 70 120 192.5 321 1.25 M 16 58.5 10 215 210 9 280 8
BD 100 SX 42500 210 BD100 SXG 42500 210 150 – – 100 150 248.5 411 3.75 M 20 79 10 276 270 11.5 365 10

Keyways to DIN 6885/p1. Tolerance of keyway width; JS 10. The table torques are nominal torques and contain a safety factor of 2. Freewheels with standard bores are
available immediately. Other bore diameters made to order.

Selection of size and speeds : Characteristics : Installation :

The freewheel size is selected accord- The centering on the covers makes it par- Freewheels of the type BD are supplied filled
ing to recommendation on page 6; de- ticularly suitable for the installation of with oil or grease, ready for installation. Toler-
tails of indexing frequencies, max. smaller and simple parts (chain wheels, ance of the shaft should be h6 or j6. Fasten-
speeds and operating life on pages 22- gear wheels etc.) ing screws need to be provided by the cus-
25. tomer for mounting the connecting part.

10
Series FRS, FRX, FRZ
Freewheels for interfaced screw connections

Freewheel FRS 500 can be used

as Overrunning clutch for air
preheater of boiler at Thermal
Power Station.

Air is to be preheated before it is

fed to the boiler, and in any cir-
cumstances this feeding should not
stop. For this application special
gearbox with two/three input shaft
is used and drive by electric motor,
air motor or diesel motor. To acti-
vate one motor and decoupled the
other motor overrunning clutch is
used.

36 37

A B C D E
Series Size Weight Max. Bore Length Outer Outside Bolt Qty. Thread
Through Bore Race Length Diameter Circle & Size of
kg mm mm mm mm mm Bolt Hole (Inches)

FRS/FRX/FRZ 400 2.7 22.23 69.85 68.25 88.90 73.03

(4) - 312-24
FRS 450 2.7 28.58 69.85 68.25 88.90 73.03
FRS/FRX/FRZ 500 4.5 33.34 88.90 85.73 107.95 92.08
FRS/FRZ 550 5.4 41.28 82.55 79.38 120.65 107.95
(6) - 312-24
FRS/FRX/FRZ 600 8.6 50.80 95.25 92.08 136.53 120.65
FRS/FRX/FRZ 650 10.9 63.50 88.90 85.73 165.10 146.05 (8) - 375-24
FRS/FRX/FRZ 700 19 74.61 127.00 123.83 180.98 158.75 (8) - 375-24*
FRS/FRX/FRZ 750 37.6 87.31 152.40 149.23 222.25 177.80 (8) - 500-20*
FRS/FRX/FRZ 800 46.2 114.30 152.40 149.23 254.00 227.00 (8) - 500-20

* Six holes are equally spaced 60° with two additional holes located 30° to the six eqyally spaced holes and 180° apart.
l Centerline of the application of force on the outer ring should lie between the two ball bearing, this is particularly important for indexing applications.

Maximum Torque Maximum Speed (RPM) Selection of size and

Size Lubrication Capcities speeds :
Inner Race Outer Race Max. Driving
Ib.ft. Nm Overrunning Overrunning Speed The freewheel size is se-
lected according to rec-
FRSG-400 GREASE 3600 3600 3600
340 461 ommendations on page
FRS-400 OIL 1900 2200 3600 6; details of indexing
FRSG-450 GREASE 3600 3600 3600 frequences on pages 22
450 610
FRS-450 OIL 1900 2100 3600 and 23
FRSG-500 GREASE 3600 3600 3600
1130 1532 Installation :
FRS-500 OIL 1400 1900 3600
FRSG-550 GREASE 1885 2556 3600 3600 3600 Freewheels of the type
FRS-550 OIL 1175 1600 3600 FRS are supplied com-
FRSG-600 GREASE 3600 3600 3600 plete with oil or grease
2325 3153
FRS-600 OIL 1100 1500 3600 filling for installation. Tol-
FRSG-650 GREASE
erance of the shaft
3200 4340 3600 3600 3600
should be h6 or j6. Fas-
FRS-650 OIL 900 1250 3600
tening screws need to
FRSG-700 GREASE 6800 9222 1800 1800 1800 be provided by the cus-
FRS-700 OIL 790 1150 1800 tomer for mounting the
FRSG-750 GREASE 10400 14105 1800 1800 1800 connecting part.
FRS-750 OIL 790 1150 1800
FRSG-800 GREASE 14500 19666 1800 1800 1800
FRS-800 OIL 700 950 1800

11
Series BA and BC
Floating Backstops Type with sprags -
centrifugal lift off X and oil lubrication

Series BA Series BC

38 39 40

Bore d Series Series Torque Speed A C D E H K L N O P Q R S

BA BC for
screw
Standard min max min max
mm mm mm Nm min-1 min-1 mm mm mm mm mm mm mm mm mm mm mm mm

30 20 30 BA 20 DX BC 20 DX 400 750 1700 110 90 106 8 80 2.5 77 11 104 19.5 65 70 M10

40 25 40 BA 25 DX BC 25 DX 650 700 1600 126 100 126 8 90 2.5 93 11 125 19.5 75 80 M12
50 30 50 BA 30 DX BC 30 DX 1100 630 1600 155 120 151 10 120 3.5 102 16 140 27.5 95 100 M16
60 40 60 BA 40 SX BC 40 SX 1400 610 1500 190 150 181 12 160 5.5 116 22 160 37.5 130 120 M16
65 45 70 BA 45 SX BC 45 SX 2300 400 1500 210 160 196 14 175 7 130 26 176 41.5 140 130 M16
80 50 80 BA 52 SX BC 52 SX 4900 320 1500 230 190 216 14 200 4.5 150 26 208 41.5 160 150 M20
90 50 90 BA 55 SX BC 55 SX 6500 320 1250 255 200 246 15 210 3.5 170 29 228 49.5 170 160 M20
100 60 105 BA 60 SX BC 60 SX 14500 250 1100 295 220 291 20 250 8.5 206 35 273 60 200 190 M24
120 70 120 BA 70 SX BC 70 SX 21000 240 1000 335 260 321 25 280 14 215 39 291 65 225 210 M24
150 100 150 BA100 SX BC100 SX 42500 210 750 420 380 411 45 345 31.5 276 60 372 80 280 270 M30

Keyway according to DIN 6885, page 1. Tolerance of keyway width JS10. The torques listed are nominal and contain a safety factor of 2.

Characteristics : Fitting Instructions : Direction of Rotation :

Series BA: backstops for fitting to shaft The securing stud of the shaft engages Please specify with your order:
ends with axial restraint. in a slot or a bore in the frame of the – direction of rotation of the shaft or
Series BA: backstops for fitting to con- machine. It should have 0.5....2 mm the backstop inner ring when viewed
tinuous shaft. play in the axial and radial directions. in direction X.
The torque arm is located by a secur- With series BA, the freewheel inner ring The direction of rotation can be
ing stud. When the securing stud is must be secured axially with a retainer reversed by changing the securing stud
unscrewed the shaft can be turned in plate. The retainer plate, seal and bolt and cover plate
either direction. can be supplied with the unit. Please
state if required.
Lubrication :
Please refer to details on page 26. Shaft tolerance should be ISO h6 or j6.
The operating and maintenance instruc-
tions regarding mounting and lubrica-
tion should be noted before fitting.

12
Series BA
Floating Backstops Type with sprags -
centrifugal lift–off X and grease lubrication

41 42

Bore d Series Torque Speed A C D E H K L N O P Q R S

BA for
screw
Standard min max min max
mm mm mm Nm min-1 min-1 mm mm mm mm mm mm mm mm mm mm mm mm

30 20 30 BA 20 DXG 400 750 2500 110 90 106 8 80 2.5 77 11 104 19.5 65 70 M10
40 25 40 BA 25 DXG 650 700 2350 126 100 126 8 90 2.5 93 11 125 19.5 75 80 M12
50 30 50 BA 30 DXG 1100 630 2350 155 120 151 10 120 3.5 102 16 140 27.5 95 100 M16
60 40 60 BA 40 SXG 1400 610 2200 190 150 181 12 160 5.5 116 22 160 37.5 130 120 M16
65 45 70 BA 45 SXG 2300 400 2200 210 160 196 14 175 7 130 26 176 41.5 140 130 M16
80 50 80 BA 52 SXG 4900 320 2200 230 190 216 14 200 4.5 150 26 208 41.5 160 150 M20
90 50 90 BA 55 SXG 6500 320 2000 255 200 246 15 210 3.5 170 29 228 49.5 170 160 M20
100 60 105 BA 60 SXG 14500 250 1800 295 220 291 20 250 8.5 206 35 273 60 200 190 M24
120 70 120 BA 70 SXG 21000 240 1650 335 260 321 25 280 14 215 39 291 65 225 210 M24
150 100 150 BA 100 SXG 42500 210 1450 420 380 411 45 345 31.5 276 60 372 80 280 270 M30

Keyway according to DIN 6885, page 1. Tolerance of keyway width JS10. The torques listed are nominal and contain a safety factor of 2.

Characteristics : Fitting Instructions : Direction of Rotation :

Backstops for fitting to shaft ends with The securing stud of the shaft engages Please specify with your order:
axial restraint. in a slot or a bore in the frame of the – direction of rotation of the shaft or
machine. It should have 0.5....2 mm the backstop inner ring when viewed
The torque arm is located by a secur- play in the axial and radial directions. in direction X.
ing stud. When the securing stud is
unscrewed the shaft can be turned in With series BA, the freewheel inner ring The direction of rotation can be
either direction. must be secured axially with a retainer reversed by changing the securing stud
plate. The retainer plate, seal and bolt and cover plate
Lubrication : can be supplied with the unit Please
Please refer to details on page 26. advise if required.
Shaft tolerance should be ISO h6 or j6.
The operating and maintenance instruc-
tions regarding mounting and lubrica-
tion should be noted before fitting.

13
Series FXM
Backstops for High Torques and High Speeds
Type with Sprags – Centrifugal Lift-Off X

43

Type Theoretical Torque with allowance Lift-off Max.

torque for concentricity speed speed
TIR
¦ 0 A ¦ 0.1 A ¦ 0.2 A ¦ 0.3 A ¦ 0.4 A ¦ 0.5 A ¦ 0.8 A
Nm Nm Nm Nm Nm Nm Nm min–1 min–1
FXM 31 – 17 DX 100 100 95 – – – – 890 5000
FXM 38 – 17 DX 150 140 130 – – – – 860 5000
FXM 46 – 25 DX 390 380 350 – – – – 820 5000
FXM 51 – 25 DX 480 470 420 – – – – 750 5000
FXM 56 – 25 DX 580 570 490 – – – – 730 5000
FXM 61 – 19 DX 420 410 370 – – – – 750 5000
FXM 66 – 25 DX 800 780 700 – – – – 700 5000
FXM 76 – 25 DX 1050 1040 890 – – – – 670 5000
FXM 86 – 25 DX 1350 1300 1030 – – – – 630 5000
FXM 101 – 25 DX 1700 1600 1400 – – – – 610 5000
FXM 85 – 40 SX 1900 1900 1800 1800 1700 1600 – 430 6000
FXM 100 – 40 SX 2700 2600 2500 2400 2200 2000 – 400 4500
FXM 120 – 50 SX 6500 6300 5800 4800 4400 3600 – 320 4000
FXM 140 – 50 SX 8700 8500 7900 6700 5500 5400 – 320 3000
FXM 170 – 63 SX 20000 19000 16000 14000 13000 12000 – 250 2700
FXM 200 – 63 SX 26000 23000 20500 17500 15500 14000 – 240 2100
FXM 240 – 63 UX 31000 30500 30000 29000 26000 24000 19500 220 3000
FXM 240 – 96 UX 52050 51000 49000 47500 46000 44000 35000 220 2500
FXM 260 – 63 UX 38500 38000 37000 36500 33000 29000 25000 210 2500
FXM 290 – 70 UX 59500 59000 56000 50000 47000 45000 37000 200 2500
FXM 290 – 96 UX 91000 90000 82500 77500 70000 62500 55000 200 2500
FXM 310 – 70 UX 69000 68000 64500 60000 55000 49000 43000 195 2500
FXM 310 – 96 UX 107000 105000 99000 85500 81000 74000 68000 195 2100
FXM 320 – 70 UX 76500 73000 67000 62000 56500 49500 43000 195 2000
FXM 360 –100 UX 149000 139500 128000 119500 103500 90000 80500 180 1800
FXM 410 –100 UX 193000 179500 167000 154500 137000 121500 111500 170 1500
FXM2.410 –100 UX 364000 350000 315000 296500 277500 266000 223500 210 1500
The torques listed are nominal torques and contain a safety factor of 2. Higher speeds on request. The theoretical torque presumes perfect concentricity between
inner and outer ring. In practice the concentricity is affected by bearing play and concentricity errors of the adjacent parts. Then the nominal torques in the table
apply which take into consideration the existing T.I.R.

Characteristics :
Robust backstop for peak performance. The bearings or plain bearings. Sprags with cen- all that is needed. This backstop is therefore
large amount of permissible radial runout trifugal lift-off ensure maximum life. No spe- maintenance free. The transmissible torque
means that the backstop can be fitted without cial lubrication required for speeds above the value depends on the running accuracy be-
difficulty even to shafts carried in taper roller lift-off speed, oiling at the time of assembly is tween inner and outer ring of the backstop.

14
Series FXM
Backstops for High Torques and High Speeds
Type with Sprags – Centrifugal Lift-Off X

** Tolerance of Type
dimension
0 to + 0.02 mm DX
0 to + 0.05 mm SX
0 to + 0.05 mm UX

44 45

Type Bore d A B D E F G J L P T U V W Z
min
Standard max.
mm mm mm mm mm mm mm mm mm mm mm mm mm mm
FXM 31 – 17 DX 20* – – – – – 20* 17 25 85 41 55 M 6 31 24 1 70 15 6 21 6
FXM 38 – 17 DX 25* – – – – – 25* 17 25 90 48 62 M 6 38 24 1 75 15 6 21 6
FXM 46 – 25 DX 25 – – – – – 30 25 35 95 56 70 M 6 46 35 1 82 15 6 21 6
FXM 51 – 25 DX 25 30 35 – – – 36 25 35 105 62 75 M 6 51 35 1 90 15 6 21 6
FXM 56 – 25 DX 35 – – – – – 40 25 35 110 66 80 M 6 56 35 1 96 15 6 21 8
FXM 61 – 19 DX 30 35 40 – – – 45* 19 27 120 74 85 M 8 61 25 1 105 15 6 21 6
FXM 66 – 25 DX 35 40 45 – – – 48* 25 35 132 78 90 M 8 66 35 1 115 15 8 23 8
FXM 76 – 25 DX 45 55 – – – – 55 25 35 140 90 100 M 8 76 35 1 125 15 8 23 8
FXM 86 – 25 DX 40 45 50 60 65 – 65 25 40 150 100 110 M 8 86 40 1 132 15 8 23 8
FXM 101 – 25 DX 55 70 – – – – 75 25 50 175 116 125 M 10 101 50 1 155 20 8 28 8
FXM 85 – 40 SX 45 50 60 65 – – 65 40 50 175 100 125 M 10 85 60 1 155 20 8 28 8
FXM 100 – 40 SX 45 50 55 60 70 75 75 40 50 190 116 140 M 10 100 60 1.5 165 25 10 35 12
FXM 120 – 50 SX 60 65 70 75 80 95 95 50 60 210 140 160 M 10 120 70 1.5 185 25 10 35 12
FXM 140 – 50 SX 65 90 100 110 – – 110 50 70 245 162 180 M 12 140 70 2 218 25 12 35 12
FXM 170 – 63 SX 70 85 100 120 – – 130 63 80 290 193 210 M 16 170 80 2 258 28 12 38 12
FXM 200 – 63 SX 130 – – – – – 155 63 80 310 225 240 M 16 200 80 2 278 32 12 42 12
FXM 240 – 63 UX – – – – – – 185 63 80 400 280 310 M 20 240 90 2 360 48 12 60 12
FXM 240 – 96 UX – – – – – – 185 96 125 420 280 310 M 24 240 120 2 370 48 15 60 16
FXM 260 – 63 UX – – – – – – 205 63 80 430 300 330 M 20 260 105 2 380 48 18 60 16
FXM 290 – 70 UX – – – – – – 230 70 80 460 330 360 M 20 290 105 2 410 48 18 60 16
FXM 290 – 96 UX – – – – – – 230 96 110 460 330 360 M 20 290 120 2 410 48 18 60 16
FXM 310 – 70 UX – – – – – – 240 70 125 497 360 380 M 20 310 110 3 450 48 18 60 24
FXM 310 – 96 UX – – – – – – 240 96 125 497 360 380 M 20 310 120 3 450 48 18 60 24
FXM 320 – 70 UX – – – – – – 250 70 80 490 360 390 M 24 320 105 3 440 55 20 68 16
FXM 360 – 100 UX – – – – – – 280 100 120 540 400 430 M 24 360 125 3 500 55 20 68 24
FXM 410 – 100 UX – – – – – – 320 100 120 630 460 480 M 24 410 125 3 560 55 20 68 24
FXM2.410 – 100 UX – – – – – – 320 200 220 630 460 480 M 30 410 220 3 560 55 20 68 24
Keyway to DIN 6885, p. 1. Bores marked *have keyways to DIN 6885, p.3 Keyways width : tolerance IT 10. Freewheels with standard bores can be delivered
immediately. Other diameters made to order.

Supply Fitting Instructions

Optional cover (ill. 45) available on request. The backstop is not fitted with bearings so permitted limits for T.I.R. must be adhered to.
Please note separately on your order. that the outer ring must be mounted Shaft tolerance should be ISO h6, j6 or k6.
concentric with the inner ring. The maximum

15
Series FGR A2-A3 and FGR A3-A4
Floating Backstops
Type with Rollers

46 47 48

Bore d Series Series Torque D E F G H L N O P Q

FGR A2-A3 FGR A3-A4
Nm mm mm mm mm mm mm mm mm mm
12 FGR 12 A2-A3 FGR 12 A3-A4 55 62 13 1 M 14 59 42 10 64 10 44
15 FGR 15 A2-A3 FGR 15 A3-A4 130 68 13 1 M 14 62 52 10 78 10 47
20 FGR 20 A2-A3 FGR 20 A3-A4 180 75 15 1 M 16 72 57 11 82 12 54
25 FGR 25 A2-A3 FGR 25 A3-A4 290 90 18 1 M 20x2 84 60 14 85 16 62
30 FGR 30 A2-A3 FGR 30 A3-A4 500 100 18 1 M 20x2 92 68 14 95 16 68
35 FGR 35 A2-A3 FGR 35 A3-A4 730 110 22 1 M 24x2 102 74 18 102 20 76
40 FGR 40 A2-A3 FGR 40 A3-A4 1000 125 22 1 M 24x2 112 86 18 115 20 85
45 FGR 45 A2-A3 FGR 45 A3-A4 1150 130 26 1 M 30x2 120 86 22 115 25 90
50 FGR 50 A2-A3 FGR 50 A3-A4 2100 150 26 1 M 30x2 135 94 22 123 25 102
55 FGR 55 A2-A3 FGR 55 A3-A4 2600 160 30 1 M 36x2 142 104 25 138 32 108
60 FGR 60 A2-A3 FGR 60 A3-A4 3500 170 30 1 M 36x2 145 114 25 147 32 112
70 FGR 70 A2-A3 FGR 70 A3-A4 6000 190 35 1 M 42x2 175 134 30 168 38 135
80 FGR 80 A2-A3 FGR 80 A3-A4 6800 210 35 1 M 42x2 185 144 30 178 38 145
90 FGR 90 A2-A3 FGR 90 A3-A4 11000 230 45 1 M 55x2 205 158 40 192 50 155
100 FGR 100 A2-A3 FGR 100 A3-A4 20000 270 45 1 M 55x2 230 182 40 217 50 180
130 FGR 130 A2-A3 FGR 130 A3-A4 31000 310 60 1 M 72x2 268 212 55 250 68 205
150 FGR 150 A2-A3 FGR 150 A3-A4 68000 400 60 1 M 72x2 325 246 55 286 68 255
Keyway according to DIN 6885, page 1, Tolerance of keyway width JS10.
Characteristics : Fitting Instructions : Torques :
Series FGR A2-A3 : backstops for fitting to The securing stud of the shaft engages in a The torques listed in the table are nominal.
continuous shafts. slot or a bore in the frame of the machine. It The maximum torques are :
Series FGR A3-A4 : backstops for fitting to should have 0.5 ... 2 mm play in the axial and 0.7 x M Nenn with 107 load cycles
shaft ends. radial directions. 1.6 x M Nenn with 106 load cycles
Shaft tolerance should be ISO h6 or j6. The 2 x M Nenn with 4.105 load cycles
operating and maintenance instructions Peak torques created in the backstop must
regarding mounting and lubrication should be always be lower than the maximum torque
noted before fitting. given bei above load cycle factors.
Direction of Rotation :
Please specify with your order :
– direction of rotation of the shaft or the back-
stop inner ring when viewed in direction X.
The direction of rotation can be reversed by
changing the securing stud and cover plate.

16
Series FA and FAA
Freewheels with indexing lever arm

Freewheels in a material roller feed sys-

tem : The indexing freewheel is driven
via a cam with adjustable stroke. A
second freewheel serves as a back-
stop and prevents the feed roller from
returning while the indexing freewheel
makes a noload stroke. Often a small
brake is used to prevent overrun of
the material.

49 50

51 52

Standard Type with Bore d B C D E H L L1 N N1

type P-grinding

Type Torque Type Torque Standard Max.

Nm Nm mm mm mm mm mm mm mm mm mm mm mm

FA 37 SF 230 FA 37 SFP 120 20 25 – 25* 28 35 76 12 90 35 – 11.5 –

FA 57 SF 630 FA 57 SFP 320 30 35 40 42* 38 50 100 16 125 45 – 14.5 –
FA 82 SF 1600 FA 82 SFP 900 50 55 – 65* 48 60 140 18 160 60 – 21 –
FA 107 SF 2500 FA 107 SFP 1350 70 80 – 85* 50 80 170 20 180 65 – 22.5 –

FAA 37 SF 230 FAA 37 SFP 120 20 – – 25* 28 35 76 12 90 – 65 – 12.5

FAA 57 SF 630 FAA 57 SFP 320 30 35 – 42* 38 50 100 16 125 – 85 – 15.5

Keyways to DIN 6885/p.1. Bores marked* have keyways to DIN 6885/p.3 Keyway width tolerance grade IT 10. The table torque are nominal torques and contain
a safety factor of 2. freewheels with standard bores are available immediately. Other bore diameters made to order.

Selection of size and speeds Installation : Characterisitic :

The freewheel size is selected according to Tolerance of the shaft should be h6 or j6. Simple, cheap indexing freewheel with plain
recommendations on page 6 ; details of in- The indexing lever arms are not hardened to bearings for low and medium fast indexing
dexing frequencies on pages 22 and 23. allow the customer to drill bores to suit. In speeds. The freewheels have grease lubrica-
the case of series FAA, the torque arm must tion and are therefore maintenance free. Se-
not be clamped tight, it should have 0.5…2 ries FAA is a combination of indexing free-
mm play in axial and circumferential direc- wheel and back stop.
tion.

17
Series ZZ and FC
with roller bearing dimensions
Sprag Type

53 54

Standard Bore d Load Capacity B D K

Type dyn. Stat.
Type Torque C Co
Nm mm N N mm mm mm
ZZ 8 2.5 8 3280 860 9 22 27
ZZ 6201 9.3 12 6100 2770 10 32 39
ZZ 6202 L 13 15 6000 3700 11 35 42
ZZ 6202 M 26 15 6000 3700 11 35 42
ZZ 6203 L 17 17 7350 4550 12 40 51
ZZ 6203 M 34 17 7350 4550 12 40 51
ZZ 6204 L 32 20 10000 6300 14 47 58
ZZ 6204 M 65 20 10000 6300 14 47 58
FC 6205 40 25 11000 7000 15 52 63
ZZ 6205 M 80 25 11000 7000 15 52 63
ZZ 6206 M 110 30 15000 10000 16 62 73
ZZ 6206 S 170 30 15000 10000 16 62 73
ZZ 6207 175 35 12600 7280 17 72 85
ZZ 40 325 40 15540 12250 22 80 94
ZZ 6206/25 M 110 25* 15000 10000 16 62 73
ZZ 6206/25 170 25* 15000 10000 16 62 73
Bores marked * have keyways according to DIN 6885, p.3 keyway width; toletance grade IT 10. The table torques are nominal torques and contain a safety factor of 2.

Selection of size and speeds : Installation : Characteristics :

The freewheel size is selected according The torque is transmitted with press fit on Freewheels of the ZZ–and FC–series are
to recommendation on page 6; details of the outer ring and inner ring. Tolerance for identical in their outer dimensions with
indexing frequencies, max. speeds and the shaft should be n5 and for the hous- grooved ball bearings of the series 62
operating life on pages 22 and 25 ing N6. Exception:ZZ 6206/25 where the and also have the same characteristics.
shaft tolerance should be h6. To transmit There is therefore no need for additional
the table torques the outer ring must be bearings.
accommodated in a steel housing with
outer diameter K. If other materials are Lubrication :
used for the housing, if the outer diam- The freewheels are supplied filled with
eters are smaller, or if mounting onto hol- grease for normal operation and are
low shafts, please contact us to request therefore maintenance free.
the transmissible torque values. Connecting the freewheel to oil lubrica-
Permissible operating temperature lies tion (provided by the customer) is also
between–40 oC and up to 80 oC. possible and is particularly recom-
mended for applications involving high
speeds.

18
Series FCN
with roller bearing dimensions

Type FCN....K Type FCN....CF

55 56

Standard Type Bore d Load Capacity B D K

dyn. Stat.
Type Torque C Co
Nm mm N N mm mm mm
FCN 8 R 3.2 8 – – 8 24 28
FCN 10 R 7.3 10 – – 9 30 35
FCN 12 R 11 12 – – 10 32 37
FCN 15 R 12 15 – – 11 35 40
FCN 20 K 65 20 10000 6200 14 47 54
FCN 25 K 80 25 10000 6200 15 52 60
FCN 30 K 110 30 15000 10000 16 62 70
FCN 35 CF 200 35 – – 17 72 80
FCN 40 CF 260 40 – – 18 80 90
FCN 45 CF 300 45 – – 19 85 96
FCN 50 CF 330 50 – – 20 90 100
FCn 55 CF 420 55 – – 21 100 112
FCN 60 CF 500 60 – – 22 110 122
FCN 80 R 840 80 – – 26 140 155
keyways according to DIN 6885, p.3 keyway width; toletance grade IT 10. The table torques are nominal torques and contain a safety factor of 2.

Selection of size and speeds : Installation : Characteristics :

The freewheel size is selected according The torque is transmitted with press fit on Freewheels of the FCN–series are identi-
to recommendations on page 6; details the outer ring and inner ring. The bore for cal in their outer dimensions with grooved
of indexing frequencies, max. speeds and housing D should be made to tolerance ball bearings of the series 62. Freewheels
operating life on pages 22-25. H7 or J6. Tolerance for the shaft d should FCN...K also act as ball bearings. They can
be h6 or j6 absorb radial and axial forces.
Freewheels FCN...R and FCN...CF have no
To transmit the table torques the outer ring bearing characteristics and are used where
must be accommodated in a steel hous- an existing bearing keeps the freewheel
ing with minimum outer diameter K. if inner ring concentric to the outer ring.
other materials are used for the housing,
if the outer diameters are smaller, please Lubrication :
contact us to request the transmissible The freewheels FCN...K are supplied filled
torque values. with grease for normal operation and are
permissible operating temperature lies therefore maintenance free.
between–40 oC and up to 80 oC Connecting these freewheel to oil lubrica-
tion (provided by the customer) is also pos-
sible and is particularly recommended for
applications involving high speeds. In the
case of freewheels FCN...R and FCN...CF
adequate lubrication with the recom-
mended oil grade must be provided be-
fore start up.

19
Series FSN
with radial keyways on the outer ring

with 2 Keyways on
each side offset at
180o with width
NH11

57

d MNenn B D E F N P
mm Nm mm mm mm mm mm mm

8* 11 13 35 18.5 28 4 1.3
12* 11 13 35 18.5 28 4 1.3
15 36 18 42 21 36 5 1.7
17 56 19 47 24 40 5 2.0
20 100 21 52 34 42 6 1.5
25 160 24 62 37 55 8 2.0
30 240 27 72 44 62 10 2.5
35 300 31 80 50 66 12 3.5
40 460 33 90 62 79 12 3.5
45 660 36 100 62 79 14 3.5
50 940 40 110 72 90 14 4.5
60 1300 46 130 82 100 18 5.5
70 1900 51 150 107 125 20 6.5
80 2600 58 170 107 125 20 7.5

Keyways to DIN 6885/page 3. Bores marked * have keyways to DIN 6885/page 1. keyway width: tolerance JS 10.

Example for Ordering : Mounting Instructions : Torques :

FSN freewheels are provided with radial key- The table torques MNenn are nominal torques,
Series FSN with bore ways on the outer ring for torque transmission. they include a safety factor of 2 and are only
d=50mm: The bore fit for accommodating the outer ring is applicable to concentric inner and outer ring.
H7 or G7. Any axial or tilting forces must be absorbed
FSN 50 by the adjacent bearings.
The Shaft tolerance should be ISO h6 of j6.

20
CAGE FREEWHEELS
Original Borg-Warner
Series BWX

58 59

Mnenn J D B Kmin Sprags Strips Clips Design

Series BWX +0.008 ±0.013 as
–0.005 ill.
Nm mm mm mm mm no. Type no. no.
BWX 133590A 63 22.225 38.887 10.0 min 44.0 12 diseng. – – 2
BWX 13143A 120 27.767 44.425 13.5 min 51.0 14 eng. – – 2
BWX 133392 280 38.092 54.750 16.0 min 71.0 18 diseng. – – 3
BWX 1310145 180 41.275 57.937 13.5 min 74.2 14 diseng. – 3 2
BWX 132909A 360 44.450 61.112 16.0 min 78.5 20 diseng. 2 3 2
BWX 133339 310 49.721 66.383 13.5 min 85.0 22 2 4 2
BWX 1310003 310 49.721 66.383 13.5 min 85.0 22 diseng. – 4 2
BWX 137222 570 49.721 66.389 19.0 min 85.0 22 eng. – – 2
BWX 1310172 540 54.765 71.427 16.0 min 91.7 24 eng. – – 2
BWX 1310226 520 54.765 71.427 16.0 min 91.7 24 diseng. 2 4 2
BWX 133780 540 54.765 71.427 16.0 min 91.7 24 eng. – – 2
BWX 136709 770 54.765 71.427 21.0 min 91.7 24 eng. 3 10 2
BWX 1310147 1000 54.765 71.427 25.4 min 91.7 24 diseng. 3 8 2
BWX 136324 600 57.760 74.427 19.0 min 95.0 26 eng. – – 3
BWX 1310080 670 72.217 88.882 13.5 min 115.0 30 diseng. – – 2
BWX 13168 1300 72.217 88.882 21.0 min 115.0 30 eng. – – 3
BWX 134012 1300 72.217 88.882 21.0 min 115.0 30 diseng. 4 10 3
BWX 133687 580 79.6982 96.363 13.5 min 124.0 24 diseng. 3 4 2
BWX 137322 2000 79.6982 96.363 25.4 min 124.0 34 diseng. 5 12 2
BWX 134008A 2600 85.7762 104.776 25.4 min 134.7 34 eng. 5 17 2
BWX 13261A1 1600 103.2312 119.893 16.0 min 154.0 40 diseng. 6 10 3
BWX 13236 1700 117.3912 136.391 16.0 min 175.3 30 diseng. 5 6 3
BWX 133403B 4900 123.8812 142.880 25.4 min 188.0 44 eng. – 11 2

1 With this the centering flange of the inner cage is on the right hand sight !
2 Tolerance of the inner ring race diameter may be increased by ± 0,013 mm !

Application and Types

Double-cage freewheels of the BWX series spring to ensure simultaneous response and, overrunning. This occurs at relatively high
are complete sprag asseemblies ready for hence equal load sharing even under the speeds.
installation and capable of transmitting high most orduous operating conditions. Two de- Engaging
torques within a small space. They are fitted signs of sprag are available in the BWX With this design as the outer ring rotates
between cylindrical inner and outer races series: the resulting centrifugal force acts to force
and are thus easy to mount. The sprags are Dlsengaging the sprags against the inner race and
guided by both an inner and an outer cage When the outer element is rotating centrifu- into engagement. This serves to improve
and individually energised by a ribbon gal force results in lift-off from the inner the accuracy and repeatability in indexing
race giving wear-free operation during applications.

Installation
The outer cage should be axially restrained inner and outer races be chamfered at an For indexing either the inner or outer race
by circlips, end plates or locking washers. angle of 15 degrees for a length of 3 mm. may be used. For Backtopping with the outer
The inner cage should be free to move over To reduce wear when overrunnig, or to en- overrunning disengaging sprags should be
the 'B' dimension. There must be no under sure the greatest accuracy in high speed selected. With the inner overrunning either
cuts, recesses, shoulders or chamfers, or any indexing applications, some BWX types are enagaging or disengaging may be used.
eccentricity whatsoever, over dimension 'B'. available fitted with drag strips on the inner
For ease of assembly we recommend that the cage or clips on the outer cage.

21
Technical Points

Selection of Freewheel Size

The calculation methods on page 6 for value calculated from the motor pull-out descriptions of the installation and operat-
the selection of freewheel sizes should be torque. Similar conditions apply to com- ing conditions, preferably by completing
observed. With overrunning clutches,the bustion engines which even when operat- the questionnaire on page 27.
torques occurring during the start should ing normally reach peak torques far in
be checked. The peak torques occouring excess of the nominal torque due to their
when starting nonsynchronous motors-par- degree of cyclic irregularity. Occuring peak
ticularly when accelerating large masses torques must be smaller than double the
and when using torsionally flexible cou- nominal torque in the table. If you are
pling-can reach many times the torque unsure, please contact us with exact

Bearing
On freewheels without integral bearings check that the bearing manufacturers' and tilting forces. Axial forces between
the design should ensure that inner and specifications are adequate for the inner and outer must not be directed via
outer ring are located concentrically to each customer's application. Documentation on sprags or rollers as this would impair
other with minimum play. The sprags do bearing types and bearing distances can safe torque transmission. For this reason
not have a centering effect of outer ring to be made available on request. Types CFR bearing between inner and outer ring must
inner ring. If the radial runout exceeds the of the series FDN, FDE and FD (It is not be free from axial play. The preferred
prescribed limits, the torque capacity will given in this catalogue, we can provide design solution are therefore axially pre-
be reduced which could result in failures. you by request) have a built-in bearing to loaded roller bearings.
In the case of freewheels with built-in bear- absorb the radial forces. A second bearing
ings it is the customer's responsibility to should be provided to absorb both axial

Location of Actuating Force

The force affecting the freewheel-connect- beyond the bearings, then a rigid bearing a central location of the actuating force for
ing rod force, belt tension or similar should or a pre-loaded bearing should be provided. achieving the maximum indexing accurancy
act between the bearings of the freewheel. Otherwise the operating life of the freewheel and maximum operating life.
If the line of application of the force lies will be reduced. Indexing applications require

Sprag Track
For freewheels without inner ring the inner – average peak-to-valley height as per If other hardening methods are used or if
sprag track is manufactured by the cus- DIN 4768 p.1: the recommended procedures cannot be
tomer who also has to undertake the hard- 1.6 µm < Rz ≤ 6.3µm followed, we would be pleased to assist in
ening and grinding process (casehardening _ hardness : 62 ± 2 HRc finding the most suitable solutions, both
or through harening) after which the sprag with casehardening: technically and economically.
track should show the following character- casehardening depth Eht For easier mounting when drawing on the
istics as per DIN 50 190 p.1: 1.5..2mm freewheel a lead-in chamfer of, say 2x30°,
– taper of the track ≤ 3 µm to every 10 hardness limit HG-550 HV1 should be provided on the sprag race.
mm of track length. core strength 110 N/mm2

Fastening Screws for Connecting Parts

With many of the freewheels described in able in positive mode, and the force on into account the shearing capacity of the
this catalogue, the connecting part is the connecting screw acts in only one bolts. Experience has shown that for these
screwed to the freewheel outer ring by circumferential mode. The connection be- connecting screws material grade 8.8 is
the customer. This screw connection tween outer ring and connected part is not sufficient and gives best possibility. Grade
should not be compared with normal screw purely by friction because the elastic ex- 12.9 screws should not be used because
connections, for example those which are pansion of the outer ring during torque of their high degree of brittleness. Tighten-
listed in VDI 2230 (German industry guide- transmission leads to shearing between ing torques for the freewheel fastening
line on systematic calculation of high duty the connected parts until the screws located screws should be selected as per the val-
bolted connections.) The torque in free- circumferentially. Therefore, bolt connections ues listed in VDI 2230, in each case taking
wheels is pulsating and is cyclically vari for freewheels should be calculated to take into account the existing friction values.

Indexing Frequency and indexing Duration

Maximum indexing frequency and the freewheel is affected by a large variety of it is to make general assumption about
length of time that the indexing operation influences emanating from the total ma- the maximum indexing frequency of a given
lasts (duration) depend on the indexing chine construction. Of particular impor- catalogue freewheel. We know of sucessful
frequency itself and are therefore impor- tance are: type of machine, size and tim- applications involving cataloue freewheels
tant design factors for indexing freewheels. ing of the indexing torque and the index- with maximum indexing frequencies of up
ing angle, required indexing accuracy, type to aproximately 800 indexing actuations
Maximum indexing frequency:
of indexing freewheel, lubrication, whether perminute.
The maximum permissible indexing fre-
driving of the freewheel is via inner or
quency of a give freewheel cannot be
outer ring. The list is by no means com-
clearly defined by a number because the
plete but demonstrates how impossible

22
Technical Points

Indexing duration :
The duration of indexing is subject to simi- the results of this research, the indexing
lar influences as the maximum frequency duration depends particularly on the torque
because the influences on the freewheel and the resulting hertzian pressure on the
are the same. Precise calculations of the contact points of the sprag. One has to
functional indexing duration for given cata- differentiate between three areas as shown
logue freewheel are not possible. Exten- in the graphica of ill.60 : overload, fatigue
sive research by the FVA and bearing wear. Indexing freewheels
(Forschungsvereinigung Antriebs technik should be designed so that they operate
e.V- Power Transmission Research Asso- in the area of bearing wear, when it is
ciation) have shed light on certain connec- possible to achieve load change figures
tions, albeit under extermely favourable of above 1x108. An indexing frequency of
testing conditions which could not easily 100 actuations per minute therefore cor- 60
be translated to the real-life operating con- responds to ca. 16666 hours of indexing
ditions of indexing frewweels. According to duration.

Maximum Speeds and Operating Life of The maximum permissible speed assigned Dependence of maximum speed on lu-
for Overrunning Cultches to an overrunning clutch (except in the brication and heat transmission :
The maximum permissible speed of free- case of centrifugal-and hydrodynamic lift of Two basic speed limits must be observed
wheels which are used as overruning sprags) should always minimum in context when it comes to lubrication and heat
clutches depends first and foremost on with the required minimum freewheeling transmission :
–the required duration of the freewheeling duration ! – limit of maximum permissible oper-
operation Information regarding freewheeling dura- ating temperature
–lubrication and heat transmission tion of freewheels is available on request – age limit of lubricant
–design of the freewheel Please give details of operating conditions.
Maximum permissible operating
temperature :
Dependence of maximum speed on the
One point when a freewheeling overruning
required duration of the freewheeling
clutch has reached the maximum permis-
operation :
sible speed is when the maximum
Freewheels with sprags or rollers suffer, permisible operating temperature has been
like any other sliding-frictions machine part, reached. Overruning clutches are lubricated
from wear. This wear increases with the with either oil or grease in order to minimise
increasing relative speed of the two sliding friction between sliding parts while free-
parts. Clever design can reduce this effect wheeling. An additional function of the lu-
or even reverse it. The qualitative progress bricant is to transmit the occurring friction
of the freewheels, all with different design heat and abrasive wear away from the
features, is shown in ill. 61. The design contact point. If at all possible, one should
criteria for reducing sliding wear are in opt for oil lubrication as the best solution
more detail on page 7. for the above tasks.
An enclosed freewheel (unit incorporating
sprag elements with bearing, seals and
sprag elements with bearing seals and
filled with lubricant) has four main sources
of heat which have an inhibiting effect on
the maximum permissible speed of the
freewheel.:
– friction heat of the sprag elements
– friction heat of the bearings
– friction heat of the seals
– friction heat of the lubricant
The total friction heat is given off to the
atmosphere, so that the ambient condi-
tions (ambient temperature, air flow etc.)
are also having an affect on the operating
temperature of the enclosed freewheel.
It follows that ambient conditions also play
a speed-inhibiting role for the enclosed
61 freewheel.

23
Technical Points

Ageing of Lubricants
The lubricant ages due to the mechanical of the lubricant are taken into consider- permissible speed was determined. Another
demands made upon it and, after a certain ation when the maximum speed is important criterion is bearing life for which
period of use, is no longer able to sustain detemined. the recommendations of the bearing manu-
sufficiently the necessary functions of re- facturers are binding.Economical consider-
ducing friction and protecting against wear. Maximum speed dependency on the de- ations usally dictate that a standard free-
The speed with which a lubricant ages sign properties of the freewheel wheel is designed for a maximum speed
depends amongst other things on the free- Due to the centrifugal forces created with which would satisfy requirements of almost
wheeling speed of the overrunning clutch. rotation, all components of an enclosed all applications. Certain design modifica-
In cases where the lubricant cannot, or freewheel are put under stress. The maxi- tions can achieve higher speed.
must not, be changed freewheel manufac- mum permissible stress per components
ture has to ensure that the ageing properties has been taken into account when the

Data on maximum speeds during

freewheeling operation
Below are the maximum speeds in respect type freewheels. it is possible in principle, information, if possible by completing the
of the series covered by this catalogue . to achieve higher speeds by introducing questionnaire on pages 27 and 28 and
These details apply to standard freewheels modifications which deviate from the stan- providing a sketch or drawing of the con-
with an ambient temperature of 20°C. Dif- dard design. For such cases, or in the necting parts.
ferent maximum speeds applay to case of series with no maximum speed
other ambient temperatures and special allocated, please consult us for further
Enclosed freewheels of the FB-series :
Maximum permissible speeds for freewheels FBF and FB in standard types, types with P-grinding and RIDUVIT

Freewheel size FB 24 29 37 44 57 72 82 107 127 140 200 270 340 440

ni max [r.p.m]
4800 3500 2500 1900 1400 1120 1025 880 800 750 630 510 460 400
shaft overrunning
na max [r.p.m] 5500 4000 2600 2200 1750 1600 1450 1250 1150 1100 900 750 630 550
outer ring1 overrunning

The speed limits apply to the above types Higher speeds are possible with certain trifugal lift-off etc.) Please let us have the
with an ambient temperature of 20°C. design modifications (special seals, cen- completed questionnaire on pages 27 and
28 for further advice.
Enclosed freewheels of the BD Series
Maximum permissible speeds for freewheels of the BD series with sprags and oil lubrication

Freewheel size BD 20 DX 25 DX 30 DX 40 DX 45 SX 52 SX 55 SX 60 SX 70 SX 100 SX

ni max [r.p.m]
1700 1600 1600 1500 1500 1500 1250 1100 1000 750
shaft overrunning

The speed limits apply to standard types Higher speeds are possible with certain 27 and 28 and we shall be pleased to
with an ambient temperature of 20° C. design modifications. Please let us advice you further.
have the completed questionnaire on
pages
Maximum permissible speeds for freewheels of the BD series with sprags and grease lubricated ball bearings.

Freewheel size BD 20 DXG 25 DXG 30 DXG 40 DXG 45 SXG 52 SXG 55 SXG 60 SXG 70 SXG 100 SXG
ni max [r.p.m]
5000 5000 5000 5000 4500 4000 3000 2700 2100 1900
shaft overrunning

The speed limits apply to standard types to the grease lubricant's age limit L10. The ture of 70°C. Aiming for a service life L10 of
with an ambient temperature of 20°C. Higher diagram below (ill.62) shows the depen- the grease lubricant of more than 30000
speeds are possible provided that appropri- dence of the grease lubricant age limit L10 hours is not advisable. Shown in the dia-
ate design measures are taken to increases on the freewheeling speed in the case of gram is the selection of the (total) theoreti-
the stability of components. We shall be the BD-series. After the grease has cally possible range of the grease lubricant
pleased to offer advice regarding a solution reached the end of serviceable life L10 the life span L10 in relation to the freewheeling
for which we would require the completed bearings must be replaced or cleaned and speed of the freewheels, which would be
questionnaire on pages 27 and 28. regreased. The values in the diagram applicable to most freewheel applications.
Basically one has to bear in mind that apply to fixed installations with horizontal
grease packed ball bearings are subject shaft and a maximum operating tempera-

24
Technical Points

62

Service life of grease lubricant L10 as a function of the freewheeling speed applicable to complete freewheels of the BD–series/Type with centrifugal lift–off X and
grease–lubricated bearings.

25
Technical Points

Lubrication First and foremost of the selection criteria They are maintenance free and normally do not
Advice regarding standard lubrication (oil for the recommended lubricants for vari- require any further lubrication.
or grease) of each series can be found on ous ranges of ambient temperatures in In order to increase the life freewheels
the respective pages of the catalogue. If the table below comes the function of the with grease lubrication, the freewheels
different type is prefered please contact us sprags during the start of the machine or should be dismounted after two years,
for advice regarding a suitable alternative. installation. After the freewheel has oper- cleaned, checked and re-greased with the
ated normally for a certain time after start- recommended grease according to the
Oil Lubrication
ing, an operating temperature will be es- table.
When carrying out an oil change on en-
tablished which is generally higher than
closed freewheel originally supplied fac-
the ambient temperature. If, in the case of Freewheels with centrifugal Lift-off
tory-filled with oil, or when providing oil
oil grades intended for low ambient tem- sprags
lubrication on built in freewheels, the fol-
peratures, this operating temperature The Sprags in freewheels with centrifugal
lowing should be taken into account:
should exceed 80 °C then individual appli- lift-off which are always operated above
A non-resining oil of kinematic viscosity
cations should be examined for adequate the lift-off speed during overruning only
according to the oil table should be used
lubricating power for the roller bearings need a light oiling or greasing with a non-
for lubrication. The oil volume required for
built into the freewheels, just as grease ageing lubricant like Isoflex LDS 18 Spe-
enclosed freewheels is listed in the operat-
lubricated freewheels need to be checked cial A by Kluber.
ing instructions.
for reduction of the basic oil viscosity. For
Designs using built-in freewheels should Important :
criticals cases we recommend the syn-
ensure that the track of the inner ring is Please note that oils and grease types
thetic oil SHC 626 by Mobile Oil AG.
immersed in oil. If an oil bath is not containing molybdenum disulphide or simi-
possible then pressure lubrication must Grease Lubrication lar additives must not be used unless
be provided to keep the inner ring track Freewheels of the series FA, FAA, FCN...K, referred to us for clearance. One excep-
splash-lubricated at all times. FC and ZZ have permanent grease filling. tion: the FXM-series.
Lubricant Table

Ambient For ambient temperatures For ambient temperatures For ambient temperatures For ambient temperatures
temperature from 0°C to 50° C from –15°C to +15°C from –40°C to 0°C from –15°C to +15°C

ISO VG 46/68 (mm2/s) 32 (mm2/s) 10 (mm2/s)

viscosity at 40° C

Manufacturer Oil Grease

AGIP OSO 46/68 OSO 32 OSO 10

ARAL VITAM GF 46/68 VITAM GF 32 VITAM GF 10 ARALUB HL2

BP ENERGOL HLP 46/68 ENERGOL HLP 32 AERO HYDRAULIC 1 ENERGREASE LS2

CASTROL VARIO HDX VARIO HDX ALPHASYNT 15

CHEVRON EP HYDRAULIC OIL 46/68 EP HYDRAULIC OIL 32 HYJET IV

DEA ASTRONHLP 46 ASTRON HLP 32 ASTRON HLP 10 GLISSANDO 20

ELF ELFOLNA 46 ELFOLNA 32 ELF AVIATION

HYDRAULICOIL 20

ESSO NUTO H 46/68 NUTO H 32 UNIVIS J 13 BEACON 2

KLUBER CRUCOLAN 46/68 CRUCOLAN 32 CRUCOLAN 10 ISOFLEX LDS 18Special

A POLYLUB WH 2
MOBIL D.T.E. 25/26 D.T.E. 24 AERO HFA MOBILUX 2

SHELL TELLUS OIL 46/68 TELLUS OIL 32 TELLUS OIL 10 ALVANIA G2

Other Manufacturers Transmission or Hydraulic Oils Transmission or Hydraulic Oils Transmission-or Hydraulic Oils
without solid lubrications without solid lubrications without solid lubrications
ISO-VG 46/68 ISO-VG 32 Automatic ISO-VG 10: Watch freezing
Transmission Fluids (AFT) point Aviation-Hydraulic oils
ISO-VG 10

For temperature above 50° C and below-40°C Please contact us for further advice.

26
(Please photocopy)

Questionnaire on the Selection of Company :

Indexing Freewheels, Overrunning Address :
Clutches and Backstops

Telephone :
RINGSPANN ELECON (INDIA) LTD.
Post Box ## 43, Anand Sojitra Road Telefax :
Vallabh Vidyanagar - 388 120, Gujarat, India.
Phones : +91 (2692) 33947, 27311, 27314, 33383 Contact :
Fax : +91 (2692) 36527
E-Mail : reil@ringspann.elecon.com Department :
Website : http://www.ringspannelecon.com
Enquiry No. :

Date :

1. Type of machine,
machine group or
plant into which the
freewheel is to be
installed.

2. Function of the Intermittent drive (feed indexing unit) Section 3, and 6-8
Freewheel
Please answer the
Prevention of runback (backstop) Section 4, and 6-8
questions in these
sections
Automatic disengagement when one part Section 5, and 6-8
is running faster than the other (over-
running clutch)

0
3. Application as 3.1 Indexing angle of freewheel; from ... pneumatic cylinder
to ....0
Feed Indexing Unit cam plate
3.2 number of indexes per minute:
from ....../min to ....... /min. other [please provide details]

3.3 to-and-fro movement is mode by: ...............................................................

freewheel outer ring ...............................................................
freewheel inner ring 3.5 proposed shaft dimensions :
φ ........ mm. length .......... mm
3.4 to-and-fro mvement is produced by 3.6 normal torque: M = ........... Nm
hydraulic cylinder max. torque Mmax = ......... Nm
crank drive (incl. peaks)

4. Application as 4.1 Speed of installation location: n = .... 4.4 Are there any elastic elements between
Backstop min–1 possibility of arranging the back- the back-stop and the installation to be
stop on a faster running shaft (higher locked (torsion-flexible clutches produce
speed = lower torque = smaller back- high peak torques of the moment of
stop)? If so, please give details on locking.
sketch. Yes No
4.2 Output of driving machine: ......... kW
4.3 Arrangement of the backstop: 4.5 Will the backstop be required to ac-
commodate the starter shock which
on shaft end occurs when the driving motor is wrongly
φ........ mm, length ........ mm poled. (if yes, a stronger design of
on continuous shaft backstop may be necessary)?
φ......... mm
Yes No
on pulley
on gear
4.6 Must the backstop be releasable?
on other parts (please give details)
........................................................ No Yes, in emergency
........................................................ yes, often

27
5. Application as 5.1 In driving mode, the drive of the overrunning 5.3 To be transmitted in driving mode:
Overrunning Clutch clutch is effected via: output: .......... kW. and
Asynchronous motor torque ...... Nm resp.
5.4 Max. torque: ............... Nm
direct start λ-∆-start
Important for drives which
Other electric motor develop max. torque below the
type ...................................... nominal speed.
Combustion engine 5.5 Arrangement of Overrunning Clutch:
type ............. no. of cylinders ...... Please attach sketch or drawing with
dimensions, and brief description.
Turbine
5.6 Is the clutch to be combined with a shaft
Other (please give details) flexible coupling?
....................................................... with a flexible coupling
.......................................................
with a torsionally stiff coupling
5.2 Speeds 5.7 If large masses are to be accelerated
1. When driving : when starting:
mass Inertia moment: J = ...... kgm2
from ........ min–1 to ............ min–1
speed of the mass: n = ...... min–1
.........% of operating time 5.8 Torque fluctuations/torsional vibrations
2. When overrunning clutch is disengaged during driving produce the following
(freewheeling): limits:
primary part (drive)
minimum torque ........ Nm
from .......... min–1 to ......... min–1
maximum torque ...... Nm
secondary part (working machine)
from ....... min–1 to .......... min–1 min./max. torque not known
....... % of operating time

6. Sketch

Please attach sketch or drawing of the installation, together with drive plan of the machine or plant

7. Installation Type of bearing ...................................................

Open, in enclosed space
Conditions ...............................................................................
Open
Radial tolerance (eccentricity) of the location
In closed machine housing of installation: .................................................mm
lubrication through oil bath, oil Axial play of the shaft: ..................................mm
mist in machine housing Operating time per day : .............................hours
connection to central lubrication Other (e.g. accessibility, dust concentration and
is possible other ambient factors which might be important)
Lubricant: ..............................................
Viscosity : ........ mm2/S .............. oC ..............................................................................
Ambient temperature of the freewheel :
from ....... oC to ...........oC ..............................................................................

8. Estimated
........ piece(s) (once only) .......... piece(s) per month ....... piece(s) per year
requirements

28
The other RINGSPANN Production Programme can be found in the following catalogues :
CAT. NO. 80 CAT. NO. 88 CAT. NO. 89

SPRAG AND ROLLER CLUTCHES BACKSTOPS FREEWHEEL ELEMENTS

CAT. NO. 31 CAT. NO. 45 CAT. NO. 13

CONE CLAMPING ELEMENTS TORQUE LIMITERS PRECISION CLAMPING FIXTURES

We shall be pleased to send you the catalogue/s of your choice.

For service requirements, Please contact our nearest office with complete product details
: SELLING AGENT :
EMTICI ENGINEERING LIMITED
REGISTERED OFFICE :
Anand-Sojitra Road, VALLABH VIDYANAGAR 388 120 Gujarat, India, Phones : +91(2692) 30168, 31125 • Fax : 36508

AHMEDABAD ASANSOL BANGALORE

Ph. No. : +91-79-6406683,84,85,86 Phone : +91-341-205901, 202038, 211726 Phone : +91-80-2260219, 2281834, 2250082
Fax No. : +91-79-6401363 Fax : +91-341-202038 Fax : +91-80-2281834
E-mail : sales@ahdemtici.elecon.com E-Mail : sales@asnemtici.elecon.com E-Mail : sales@blremtici.elecon.com
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Phone : +91-7752-47347, 28922, 24122 Phone : +91-33-4761861, 4760876, Phone : +91-44-4349237, 4349497,
Fax : +91-7752-23188 4760904, 4760926 4349643, 4322455
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Phone : +91-326-306283, 302320 JAMSHEDPUR MUMBAI
Fax : +91-326-302320 Phone : +91-657-428138, 435382 Phone : +91-22-22821315, 22820725,
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Phone : +91-11-3414339,
3414341, 3414069, 3414634 Phone : +91-712-540771, 531601 SECUNDERABAD
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Phone : 65-227-8258, 65-227-8425 Phone : +91-20-4330646 INTERNATIONAL BUSINESS DIVISION
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E-mail: sales@delemtici.elecon.com.

RINGSPANN ELECON (INDIA) LIMITED

Post Box # 43, Anand Sojitra Road, Vallabh Vidyanagar - 388120
Phones : +91 (2692) 33947, 27311, 27314, 33383 Fax : +91 (2692) 36527
E-Mail : reil@ringspann.elecon.com Website : http://www.ringspannelecon.com
GRAPHICA

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