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SAE Standards   :: Hydraulic Power Pumps - SAE J744c
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This SAE Standard has been developed by the Subcommittee IV of the Construction and Industrial
Machinery Technical Committee and is intended primarily for power pumps and motors on comstruction
and industry machinery equipment.
The purpose is to match mounting flanges and shafts that are compatible with pump horsepower
input and motor horsepower output. The hydraulic power pump and motor flange and shaft designs are
illustrated in Fig. 1, with the design dimensions for each design tabulated in Table 1.
 

TABLE 1 -DIMENSIONS OF HYDRAULIC POWER PUMP & MOTOR MOUNTINGS
Mounting
Flange
and
Shaft Size
Shaft S=25,000 psi
Shaft Dimensions
Straight with Thread
Tapered
Torque, in - lb.
hp at 1000 rpm
DS1
D
C
+0.005
-0.003
LC
LS
LT
E
+0.001
-0.000
F
+/-0.005
DS3
DT
C
+0.005
-0.003
LC
LS
LT
E
+0.001
-0.000
Z
A-A
260
4.25
0.500/
0.499
3/8-24 UNF 2A
0.094
1.125
0.750
0.562
0.125
0.554
0.500/
0.499
5/16-32 UNF 2A
0.078
0.984
0.688
0.500
0.125
0.064/
0.054
A
517
8.25
0.625/
0.642
1/2-20 UNF 2A
0.125
1.344
0.938
0.719
0.1563
0.693
0.625/
0.624
1/2-20
UNF 2A
0.125
1.094
0.688
0.719
0.1563
0.084/
0.074
B
1,852
29.3
0.875/
0.874
5/8-18
UNF 2A
0.156
1.875
1.312
0.906
0.250
0.982
0.875/
0.874
5/8-18 UNF 2A
0.156
1.688
1.125
0.906
0.250
0.131/
0.121
B-B
2,987
47.5
1.000/
0.998
3/4-16 UNF 2A
0.156
2.062
1.500
1.062
0.250
1.106
1.001/
0.99
3/4-16 UNF 2A
0.156
1.938
1.375
1.062
0.250
0.131/
0.121
C
5,677
90.0
1.250/
1.248
1-12 UNF 2A
0.156
2.265
1.875
1.219
0.3125
1.386
1.125/
1.249
1-12
UNF 2A
0.156
1.938
1.375
1.219
0.3125
0.162/
0.152
C-C
10,777
171
1.500/
1.498
1-1/8-12 UNF 2A
0.156
2.875
2.125
1.375
0.375
1.664
1.501/
1.499
1-1/8-12 UNF 2A
0.156
2.348
1.875
1.375
0.375
0.194/
0.184
D
15,057
239
1.750/
1.748
1-1/4-12
UNF 2A
0.156
3.500
2.625
1.562
0.4375
1.941
1.751/
1.749
1-1/4-12
UNF 2A
0.156
2.812
2.125
1.562
0.4375
0.225/
0.125
E
15,057
239
1.750/
1.748
1-1/4-12
UNF 2A
0.156
3.500
2.625
1.562
0.4375
1.941
1.751/
1.749
1-1/4-12
UNF 2A
0.156
2.812
2.125
1.562
0.4375
0.225/
0.125
F
24,245
285
--
--
--
--
--
--
--
--
2.001/
1.999
1-1/4-12
UNF 2A
0.156
3.562
2.875
1.562
0.500
0.256/
0.246
 

                
SAE Standards   :: Drawings

Engine Mountings  ::  Hydraulic Power Pumps - SAE J744c      Click For Drawings
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