Kawasaki Motors Corp., U.S.A.

Precision Machinery Division

HMC
125
Staffa Dual Displacement
Hydraulic Motor

CONTENTS
1.
2.
3.
4.

5.

6.
7.
8.
9.
10.
11.
12.

13.

Page

General Description ................................ 2

Functional Symbols ................................ 2
Model Code ................................................. 3
Performance Data:
Motor selection ......................................... 4
Rating definitions ..................................... 4
Output torques .......................................... 5
Bearing life .................................................. 6
Volumetric efficiency ............................. 6
Circuit and Application Notes:
Displacement selection ........................ 7
Starting torques ........................................ 7
Low speed operation ............................ 7
Small displacements ............................. 7
High back pressure ................................ 7
Boost pressure .......................................... 7
Cooling flow ................................................ 8
Motor casing pressure ......................... 8
Hydraulic Fluids ........................................ 8
Temperature Limits ................................ 8
Filtration ........................................................ 8
Noise Levels ............................................... 8
Polar Moment of Inertia ....................... 8
Mass ................................................................ 8
Installation Data:
General ........................................................... 8
Crankcase drain ....................................... 8
Start-up ......................................................... 9
Installation Dimensions ............ 9 to 11

The HMC125 is one of 8 frame sizes

and is capable of developing torques
up to 8240 Nm (6080 lbf ft) with a
continuous output power of 104 kW
(140 hp).

1. GENERAL DESCRIPTION
Kawasaki Staffa high torque, low
speed radial piston motors use
hydrostatic balancing techniques to
achieve high efficiency, combined
with good breakout torque and
smooth running capability.

The Kawasaki Staffa range also

includes fixed displacement motors,
plus matching brakes and gearboxes
to extend the torque range.

The HMC series dual displacement

models have two pre-set displacements
which can be chosen from a wide
range to suit specific application
requirements. The displacements are
hydraulically selected by a directional
control valve which can be remote
from, or mounted directly on, the motor.
Displacements can be changed when
the motor is running.
The range of HMC motors extends from
the HMC010 of 202 cm3 (12.3 in3) to
the HMC325 of 5330 cm3 (325 in3)
displacement.
These motors are also available in a
continuously variable version using
either hydro-mechanical or electrohydraulic control methods.
Other mounting options are available
on request to match many of the
competitor interfaces.

2. FUNCTIONAL SYMBOLS
All model types with variants in model code positions 6 & 7 .
-F(M)3-X-SO3-X-

P1

-F(M)3-C-SO3-C-

P2

P1

DR

Min.
1

2
Max.
X

P2
DR

Min.
1

External pilot
supply

1(2)

PC

PC

2(1)
Max.

PC
A

B T

-F(M)3-C1 (-F(M)3-C2- in brackets)

-SO3-C1
(-SO3-C2- in brackets)
P1(P2)
P2(P1)
DR
Min.

Max.

-F(M)3-models only

PC

Max.

PC

-F(M)3-CS-

DR

Min.

P1

P2

BT

PC
A

B T

3. MODEL CODE
Features shown in brackets ( ) may be left blank according to requirements.
All other features must be specified.

(F**)-HM(*)C125-***-***-***-***-**-(T*)-30-(PL**)
1

1 FLUID TYPE
Blank = Petroleum oil
F3
= Phosphate ester (HFD fluid)
F11 = Water-based fluids (HFA,
HFB & HFC)
2 MODEL TYPE
Blank = Standard (HMC)
M
= To NCB (UK) specification
463/1981 (HMMC)
3 SHAFT TYPE
P*
= Cylindrical shaft with
parallel key
S*
= Cylindrical, 20 splines to
BS 3550
Q2* = Female, 34 splines to
BS 3550
Z*
= Cylindrical shaft to DIN
5480 (W85 x 3 x 7h)
* For installations where shaft is vertically
upwards specify V after shaft type letter
to ensure that additional high level drain
port is provided.

10

7 DISPLACEMENT CONTROL PORTS

(AND SHUTTLE VALVE)
Threaded ports/bi-directional shaft
rotation:
X
= X and Y ports G1/4" (BSPF
to ISO 228/1)
ISO 4401 size 03 mounting face/
bi-directional shaft rotation:
C
= No shuttle valve
CS = With shuttle valve
ISO 4401 size 03 mounting
face/uni-directional shaft rotation
(viewed on shaft end):
C1 = Control pressure from main
port 1 (shaft rotation
clockwise with flow into
port 1)
C2 = Control pressure from main
port 2 (shaft rotation
counter-clockwise with
flow into port 2)
Not available with SO3 type main port

4 HIGH DISPLACEMENT CODE

100, 110, 120, 125 in3
5 LOW DISPLACEMENT CODE
05, and 10 to 100 in3 in 10 in3
steps
6 MAIN PORT CONNECTIONS
SO3 = 6-bolt (UNF) flange: 3"
valve (Staffa original valve
housing)
F3
= SAE 11/4" 4-bolt (UNC)
flanges: 3" valve.
FM3 = SAE 11/4" 4-bolt (metric)
flanges: 3" valve.

connections 6

8 TACHO/ENCODER DRIVE
T
= Staffa original tacho drive
T1
= Suitable for Hohner 3000
series encoders. (Encoder
to be ordered separately)
Omit if not required.
9 DESIGN NUMBER, 30 SERIES
Subject to change. Installation and
performance details remain
unaltered for design numbers 30 to
39 inclusive.
10 SPECIAL FEATURES
PL** = non-catalogued features,
e.g.:
High pressure shaft seals
Alternative port connections
Stainless steel shaft sleeves
Alternative encoder and tacho drives
Motor valve housing orientation
Shaft variants
Special paint
** Number assigned as required to specific
customer build.

4. PERFORMANCE DATA
Performance data is valid for Staffa
HMC125 motors fully run in and
operating with petroleum oil. Leakage
values are at fluid viscosity of 50 cSt
(232 SUS).
MOTOR SELECTION
Use table 1 to select appropriate
displacements for each application.
Refer to table 2 for pressure and speed
limits when using fire-resistant fluids.
TABLE 1
Displacement code *
(Model code positions 4 & 5 ) 125

120

110

100

90

80

70

60

50

40

30

20

10

05

Displacement
volume/r

cm3
in3

2048 1966 1802 1639 1475 1311 1147

125 120 110 100
90
80
70

983
60

819
50

655
40

492
30

328
20

164
10

82
5

Average actual
running torque

Nm/bar
lbf ft/psi

29,9
1.52

28,7
1.46

26,3
1.34

23,6
1.20

21,0
1.07

18,3
0.93

15,7
0.80

12,8
0.65

10,6
0.54

8,1
0.41

5,9
0.30

3,1
0.16

0,6
0.03

0
0

Max. continuous
speed

r/min

190

195

210

235

260

295

340

390

440

540

600

600

600 1000

Max. continuous
output

kW
hp

104
140

101
136

94
127

88
118

81
109

75
100

68
92

62
83

55
74

48
64

37
50

19
26

4
5

0
0

Max. intermittent
output

kW
hp

125
168

122
164

116
156

112
150

106
142

100
134

93
125

86
115

77
103

67
90

52
70

33
45

6
8

0
0

Max. continuous
pressure

bar
psi

250 250 250 250 250 250 250 250 250 250 250 250 250 17
3626 3626 3626 3626 3626 3626 3626 3626 3626 3626 3626 3626 3626 250

Max. intermittent
pressure

bar
psi

275 275 275 275 275 275 275 275 275 275 275 275 275 17
4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 250

Intermediate displacements are made available to special order.

See Small displacements page 7 for information about higher pressure applications.

TABLE 2
Fluid type

Pressure, bar (psi)

Continuous Intermittent

Max. speed r/min

HFA, 5/95% oil-in-water

emulsion

103 (1500)

HFB, 60/40% water-in-oil

emulsion

138 (2000)

172 (2500)

As for petroleum oil

HFC,
water glycol

103 (1500)

138 (2000)

50% of limits
for petroleum oil

HFD, phosphate ester

250 (3626)

275 (4000)

As for petroleum oil

138 (2000)

50% of limits
for petroleum oil

RATING DEFINITIONS
CONTINUOUS RATING

For continuous duty the motor must be

operating within each of the maximum
values for speed, pressure and power
as specified for each displacement
code.
INTERMITTENT RATING

Operation within the intermittent power

rating (up to the maximum continuous
speed) is permitted on a 15% duty
basis, for periods up to 5 minutes
maximum.
INTERMITTENT MAX. PRESSURE

Up to 275 bar (4000 psi) is allowable

on the following basis:
(a) Up to 50 r/min: 15% duty for
periods up to 5 minutes maximum.
(b) Over 50 r/min: 2% duty for periods
up to 30 seconds maximum.

OUTPUT TORQUES

lb ft

Nm

6000

8000
125

Displacement code

120
7000
5000

110
100

6000
4000

90
5000

Torque

80
3000

70

4000

60
10

3000

5k

2000

50

90

75

2000

kW

kW

60 k

1000

45 kW

1000

30 kW

15 kW
0

0
0

100

200

300

400

Shaft speed (r/min)

The torque curves indicate, for each

displacement, the maximum output
torque of the motor with an inlet
pressure of 250 bar (3626 psi) and
zero output pressure. High return line
pressures will reduce the torque for
any given pressure differential.
The solid line portion of each curve
indicates the levels of maximum
torque and speed that are permitted
on a continuous basis.
The dotted portion of each curve
indicates the levels of torque and
speed at which the motor can
operate at an intermittent rating.
The starting torques shown on
the graph are average and will
vary with crankshaft angle.

BEARING LIFE

25

0
10
N= 5
7
1
N = 300
0
=
N = 45
N 600
N=

50

(h)

psi)
625
ar (3
50 b
psi)
2
0
=
0
P
0
ar (3
b
7
20
P=
psi)
000
ar (2
38 b
1
=
P
(g)
si)
00 p
r (10
a
b
70
=
P

(b)

(c)
(d)
Lmedian 100 000 50 000 40 30

(i)
20

(a)
10 000

5000

2000
lbf
5000

kN

A=

20

Sh

(e)

it

im

sl

es

10 000

str

= Side load
= Distance from mounting
face to load centre
= Max. pressure on port 1
or port 2
= Shaft speed, r/min

aft

40

W
A

200
m
A = m (8"
150 )
mm
(6"
)
A=
10
0m
m
(4"
)
(f)

60

15 000

50

(2

")

80

The nomograph allows the median

bearing life to be determined for
conditions of:
1. No side load and no axial thrust
2. Side load and no axial thrust

For more precise life prediction, or

where axial thrusts are incurred, a
computer analysis can be provided by
Kawasaki on receipt of machine duty
cycle.

To determine L10 life predictions per ISO 281-

SHAFT STRESS LIMIT

The shaft stress limit in the nomograph

is based on the fatigue rating of the
shaft. Infrequent loading above these
limits may be permitted; consult
Kawasaki.

1-1977 multiply the median figure by 0.2.

HMC125
Example 1 (follow chain dotted line):
Side load (W)
System pressure (P)
Speed (N)
Median bearing life
L10 bearing rating = median x 0.2

a) 0
b) 138 bar (2000 psi)
c) 175 r/min
d) 22 000 hrs
4400 hrs

Example 2 (follow chain dotted line):

Side load (W)
Load offset (A) from motor mounting face
System pressure (P)
Speed (N)
Median bearing life
L10 bearing rating = median x 0.2

e) 50 kN (11 240 lbf)

f) 100 mm (4.0 in)
g) 138 bar (2000 psi)
h) 50 r/min
i) 12 000 hrs
2400 hrs

VOLUMETRIC EFFICIENCY
The nomograph on page 7 enables
the average volumetric efficiency,
crankcase (drain) leakage and winch
slip/shaft creep speed to be estimated.
Example (follow chain dotted line):
Given:
1. Pressure ....................175 bar (2500 psi)
2. Displacement code ................125 (in3/r)
3. Speed ..............................................100 r/min
To obtain:
4. Volumetric efficiency .....................96.0%
5. Crankcase leakage ...................3,7 l/min
(230 in3/min)
6. Shaft creep speed ....................2.6 r/min
The shaft creep speed occurs when
the load attempts to rotate the motor
against closed ports as may occur,
for example, in winch applications.

VOLUMETRIC EFFICIENCY
Displacement code (in3/r)

Shaft speed (r/min)

10

50

100

200
390

70
80
90
100
110
120
125

6
5
4
3
2

Shaft creep/winch-slip speed (r/min)

50

60

25

0
0

100
1

0
0

200
2

3
Crankcase leakage

1000
50

2000
100

150

in3/min

300
4

3000
200

l/min

3500

psi

60

250 bar

70

80
90
Volumetric efficiency (%)

100

Pressure

5. CIRCUIT AND
APPLICATION NOTES
DISPLACEMENT SELECTION
To select either displacement, a
pressure at least equal to 2/3 of the
motor inlet/outlet pressure (whichever is
higher) is required. In most applications
the motor inlet pressure will be used.
For inlet/outlet pressures below 3,5 bar
(50 psi) a minimum control pressure of
3,5 bar (50 psi) is required. In the event
of loss of control pressure the motor
will shift to its highest displacement.
For rapid reversing applications it is
recommended to externally source the
control oil supply direct from the system
pump (use displacement control type
X or C - not CS, C1 or C2 in model code position 7 ).
STARTING TORQUES
The starting torques shown on the
graph on page 5 are average and will
vary with system parameters. For
motors with low displacement below
50 in3 and starting under load it is
recommended to select high
displacement for start-up.
LOW SPEED OPERATION
(High displacement mode)
Minimum operating speeds are

determined by load conditions (load

inertia, drive elasticity, etc.) For
operation at speeds below 3 r/min
consult Kawasaki.

(i.e. overrunning loads) then a positive

pressure, P, is required at the motor
ports. Calculate P (bar/psi) from the
appropriate formula:

SMALL DISPLACEMENTS
(5 in3 and below)
The pressures given in the table on
page 4 for displacement code 05 (and
below) are based on 1000 r/min output
shaft speed. These pressures can be
increased for shaft speeds less than
1000 r/min; consult Kawasaki for
details.

P (bar) = 1 +

N2 x V2
1,6 x 1010

+C

Where:
C = crankcase pressure, psi
N = speed, r/min
V = displacement, cm3/r
P (psi) = 14.5 +

N2 x V2 + C
4.1 x 106

In addition to 5 in3, a zero swept

volume displacement (for free wheeling
requirements) is available on request,
subject to Kawasaki approving the
application.

Where:
C = crankcase pressure, psi
N = speed, r/min
V = displacement, in3/r

HIGH BACK PRESSURE

When both inlet and outlet ports are
pressurized continuously, the lower
pressure in one port must not exceed
70 bar (1000 psi). Consult Kawasaki
on applications beyond this limit. Note
that high back pressures reduce the
effective torque output of the motor.

The flow rate of oil needed for the

make-up system can be estimated
from the crankcase leakage figure
(see Volumetric Efficiency graph
above) plus an allowance for
changing displacement; e.g. to
change high to low in 0.5 sec
requires 15 l/min (4.0 USgpm).

BOOST PRESSURE
When operating as a motor the outlet
pressure should equal or exceed the
crankcase pressure. If pumping occurs

Allowance should be made for other

system losses and also for fair wear
and tear during the life of the motor,
pump and other system components.
7

COOLING FLOW
Operation within the continuous ratings
does not require any additional cooling.

Max. operating temperature range

For operating conditions above

continuous, up to the intermittent
ratings, additional cooling oil may be
required. This can be introduced
through the spare crankcase drain
holes, or in special cases through the
valve spool end cap. Consult Kawasaki
about such applications.

Min.
Max.*

MOTOR CASING PRESSURE

With the standard shaft seal fitted,
the motor casing pressure should not
exceed 3,5 bar (50 psi). On installations
with long drain lines a relief valve
is recommended to prevent
over-pressurizing the seal.
Notes:
1. The casing pressure at all times must not
exceed either the motor inlet or outlet
pressure.
2. High pressure shaft seals are available to
special order for casing pressures of:
Continuous: 10 bar (150 psi)
Intermittent: 15 bar (225 psi)
3. Check installation dimensions (page 9) for
maximum crankcase drain fitting depth.

6. HYDRAULIC FLUIDS
Dependent on motor (see Model Code
position 1 ) suitable fluids include:
- Antiwear hydraulic oils.
- Phosphate esters (HFD fluids)
- Water glycols (HFC fluids)
- 60/40% water-in-oil emulsions
(HFB fluids)
- 5/95% oil-in-water emulsions
(HFA fluids)
Reduced pressure and speed limits, see page 4.

Viscosity limits when using any fluid

except oil-in-water (5/95) emulsions
are:
Max. off load ...........2000 cSt (9270 SUS)
Max. on load .................150 cSt (695 SUS)
Optimum .............................50 cSt (232 SUS)
Minimum ............................25 cSt (119 SUS)
PETROLEUM OIL RECOMMENDATIONS
The fluid should be a good hydraulic
grade, non-detergent petroleum oil. It
should contain anti-oxidant, anti-foam
and demulsifying additives. It must
contain antiwear or EP additives.
Automatic transmission fluids and
motor oils are not recommended.

7. TEMPERATURE LIMITS
Ambient min. ...........................-30C (-22F)
Ambient max. .......................+70C (158F)
8

Petroleum
oil

Watercontaining

-20C (-4F)
+10C (50F)
+80C (175F) +54C (130F)

Bolt torque

The recommended torque wrench

settings for the mounting bolts are:
M20 ................40714 Nm (30010 lbf ft)
3/4" UNF .......39314 Nm (290 10 lbf ft)
Shaft coupling

* To obtain optimum service life from both fluid

and hydraulic system components 65C
(150F) normally is the maximum temperature
except for water-containing fluids.

Where the motor is solidly coupled to a

shaft having independent bearings the
shafts must be aligned to within 0,13
mm (0.005) TIR.

8. FILTRATION

CRANKCASE DRAIN

Full flow filtration (open circuit), or full

boost flow filtration (closed circuit) to
ensure system cleanliness of ISO
4406/1986 code 18/14 or cleaner.

Motor axis horizontal

9. NOISE LEVELS
The airborne noise level is less
than 66.7 dB(A) DIN (70 dB(A) NFPA)
throughout the continuous
operating envelope.
Where noise is a critical factor,
installation resonances can be reduced
by isolating the motor by elastomeric
means from the structure and the
return line installation. Potential return
line resonances originating from liquid
borne noise can be further attenuated
by providing a return line back pressure
of 2 to 5 bar (30 to 70 psi).

10. POLAR MOMENT OF

INERTIA
Typical data
Displacement
code

kg m2

125
50

0,20
0,14

lb in2
700
500

11. MASS
Approx. all models: 234 kg (515 lb)

12. INSTALLATION DATA

GENERAL
Spigot
The motor should be located by the
mounting spigot on a flat, robust
surface using correctly sized bolts.
The diametral clearance between the
motor spigot and the mounting must
not exceed 0,15 mm (0.006"). If the
application incurs shock loading,
frequent reversing or high speed
running, then high tensile bolts should
be used, including one fitted bolt.

The crankcase drain must be taken

from a position above the horizontal
centre line of the motor.
Axis vertical, shaft up
Additional drain
port G1/4" (BSPF)

Standard drain port

3
/4" - 16 UNF
0,35 bar (5 psi)

An additional G1/4" (BSPF) drain

port in the front mounting flange is
provided when the V (shaft
vertically upwards) designator is
given after the shaft type letter in
position 3 of the model code. This
additional drain should be
connected into the main motor
casing drain line downstream of a
0,35 bar (5 psi) check valve to
ensure lubrication of the upper
bearing, see above diagram.
Axis vertical, shaft down

Use any drain position. The drain

line should be run above the level
of the uppermost bearing; if there is
risk of syphoning then a syphon
breaker should be fitted.

START-UP
Fill the crankcase with system fluid.
Where practical, a short period (30
minutes) of running in should be
carried out with the motor set to its
high displacement (pressure to port Y,
or to port B of the size 03 pilot valve).

13. INSTALLATION DIMENSIONS IN MM (INCHES)

HMC125 MOTOR WITH TYPE F3/FM3 MAIN PORTS CONNECTION
See additional views for:
Displacement control connections, all shaft types and alternative main ports connection

46,5 (1.83)
3 drain ports (two normally
plugged) 3/4"-16 UNF-2B with
38,0 (1.5 dia) spotface.
Warning: Pipe fittings must
not enter ports by more than
12,0 (0.5) from face.

3rd angle
projection

334,0 (13.14)

44,0 (1.75)

30,2 (1.19)

37,0 (1.45)

Port 1

Mounting face

58,7 (2.31)
25,4 (1.0)

58,7 (2.31)
Port 2
37,0 (1.45)

33,0 (1.3)

Flow directions for

shaft rotation shown.
Reverse directions
for opposite
rotation.

30,2 (1.19)
Pressure gauge
connection into
each main port;
supplied plugged
(see table)

14,0 (0.6)

Spigot
380,95/
380,87
(14.998/
14.995 dia)

87,0
(3.42)

473,0
(18.7 dia)
max.

254,0
(10.0 dia)

559,0 (22.0 dia)

159,0 (6.25)

See Displacement
control connections on
page 10

C of drains

121,0
(4.75)
203,0 (8.0)

5 holes 20,0 (0.79 dia) equi-spaced as shown on

419,1 (16.50) p.c.d. and spotfaced to 38,0 (1.5 dia)

See
Shaft types
on page 11

425,0 (16.75)

Suitable for M20 or 3/4" bolts. Recommended reaming diameter 21,0 (0.83) (for fitted bolt); see Installation Data.
Port connection details
Model
code 6

Flange

Bolt
tappings

F3
FM3
SO3

7/ "-14 UNC-2B x 27,0 (1.03) deep

11/4" 3000 series SAE, 4-bolt flange
16
M12-6H x P1.75 x 27,0 (1.03) deep
11/4" 3000 series SAE, 4-bolt flange
Staffa 3" 6-bolt flange, see separate view on next page

Pressure gauge
connections
9/ "-18 UNF-2B, SAE J475
16
G1/4" (BSPF)

3" VALVE HOUSING WITH 6-BOLT FLANGE, SO3 IN

MODEL CODE POSITION 6

DISPLACEMENT CONTROL CONNECTIONS,

MODEL CODE POSITION 7
Type X
G1/4" (BSPF) tapped ports X and Y
Displacement selection (via remotely
located valve ):
High displacement: P to Y; X to T
Low displacement: P to X; Y to T

254,0 (10)
84,0 (3.31)

6 holes
129,0
(5.06)
51,0 51,0
(2.0) (2.0)

70.0
(2.75)
Port 2

17,0 (0.67)

11,7 (0.46)

13,0
(0.51)
Y

A
P

11,0
(0.43)
Port 1

2 ports G1/4" (BSPF)

x 15,0 (0.59)
full thread depth

T
B

60,0 (2.375)

203,0 (8.0)
to motor
mounting face

203,0 (8.0)
to motor
mounting face

r. 19,0 (0.75)

28 (1.125 dia), with recess for 31,0 (1.22) i/d x 4 (0.157 dia)
section O-ring

10

Mounting
face

353,0 (13.9)

3/8"-24

44,0 (1.75)

Displacement selection:
High displacement: P to B; A to T
Low displacement: P to A; B to T

27,2 (1.07)

63,0 (2.5)
Flow direction for shaft
rotation shown on main
drawing on page 9.
Reverse flow for opposite
direction of shaft rotation.
423,0
(16.6)

UNF -2B,
10,0 (0.375)
16,0 (0.62)
deep

Types C, CS, C1 and C2

Mounting interface for directional
control valve to: ISO 4401 size 03
ANSI/B93. 7M size D03

4 holes
M5 x 12,0
(0.5) deep

4,0 (0.15 dia)

x 6,0 (0.23)
deep hole for
orientation pin
2 connections to P
port, G1/4" (BSPF) x
15,0 (0.59) full thread
depth, supplied
plugged.

Displacement selector valve is not supplied with the motor; specify and order
separately.

SHAFT TYPE P, MODEL CODE POSITION 3

Straight shaft with rectangular key
Key supplied: 24,066/24,000 (0.9475/0.9449)
wide x 16,052/15,999 (0.6320/0.6299) deep
24,033/24,000
(0.9462/0.9449)

SHAFT TYPE Q, MODEL CODE POSITION 3

Cylindrical, 34 internal splines to BS 3550
Note: The type Q shaft will transmit the maximum
torques given on page 5. However, customers should
ensure that their own mating shaft will transmit the torque
required in their application.

89,9 (3.54)
3,04 (0.12)

85,01/84,99
(3.3469/3.3461 dia)
77,01/76,93
(3.032/3.029)

97,0 (3.82)
3/ "-16
4

144,0 /142,5 (5.67/5.61)

UNF-2B x 32 (1.25) deep

67,3/65,8
(2.56/2.59)

to motor mounting face

Motor mounting face

70,6
(2.78)
7,1 (0.28)

SHAFT TYPE S, MODEL CODE POSITION 3

Straight shaft with 20 splines to BS 3550
SHAFT TYPE Z, MODEL CODE POSITION 3
Straight shaft to DIN 5480

88,85/88,82
(3.498/3.497 dia)

97,0 (3.82)

Spline data
3

/4"-16 UNF-2B x 32 (1.25) deep

76,0 (3.0)
144,0/142,5 (5.67/5.61)
to motor mounting face
Spline data
For type S shaft
To BS 3550/SAE J498c (ANSI B92.1-1970, class 5)
Flat root, side fit, class 1
Pressure angle
Number of teeth
Pitch
Major diameter
Form diameter
Minor diameter
Pin diameter
Diameter over pins

Internal spline to BS 3550-1963

Flat root side fit, class 1
Pressure angle
Number of teeth
Pitch
Major diameter
Minor diameter
Pin diameter
Pin flatted to
Diameter between pins

30
32
12/24
70,18/69,85 (2.7680/2.7500)
65,743/65,616 (2.5883/2.5833)
3,658 (0.1440)
3,556 (0.1400)
62,619/62,553 (2.4653/2.4627)

30
20
6/12
87,953/87,826 (3.4627/3.4577)
80,624 (3.1600)
79,484/78,925 (3.1293/3.1073)
8,128 (0.3200)
97,084/97,031 (3.8222/3.8201)

For type Z shaft

DIN 5480, W85 x 3 x 27 x 7h

11

Presented by:

Staffa hydraulic motors are

manufactured to the highest
quality standards in a Kawasaki
ISO 9001 certified facility.
Certification No. 891150

P-969-0013B

B/GB0401

The right to modification for technical improvement is reserved.

SG1M 2/00