Selected SAE Standards  ::  Engine Mountings

 
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SAE Standards   :: Engine Flywheel Housings-SAE J617b
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Table 1 and Fig. 1 give dimensions for flywheel housings. Fig. 1 also shows spacings for eight, twelve, and sixteen bolts.
Clutch Housings - The capscrew holes in teh clutch-housing flanges shall be 0.047 in.
larger than the nominal diameter of the flywheel housing capscrews.
The diameter of the pilot on the flange of the clutch housing shall be the same as the
nominal diameter of the bore in the flywheel housing; the tolernces shall be + 0.000 and - 0.005 in. and the maximum eccentricity shall be 0.0025 in. (indicated runout, 0.005 in)
The clutch housing pilot shall be 0.25 in. long and its lead-in chamfer shall not exceed 0.08 in. in length. The filler between the mounting flange and the pilot shall not exceed 0.04R.
The maximum variation of the face of thee clutch-housing flange from its true position when rotated about its axis, shall be 0.0025 in. (indicated runout, 0.005 in.)
 

TABLE 1 - FLYWHEEL HOUSING DIMENSIONS, IN.
SAE No.
A
Tolerance
B
C
E
Tapped Holes
Bore Diameter -0.000
Bore Ecdcentricity
Face Deviation
No.
Size
00
31.000
+0.010
0.012
0.012
34.75
35.500
3.94
16
1/2-13
0
25.500
+0.010
0.010
0.010
28.00
26.750
3.94
16
1/2-13
1/2
23.000
+0.008
0.010
0.010
25.50
24.375
3.94
12
1/2-13
1
20.125
+0.005
0.008
0.008
21.75
20.875
3.94
12
7/16-14
2
17.625
+0.005
0.008
0.008
19.25
18.375
3.94
12
3/8-16
3
16.125
+0.005
0.008
0.008
17.75
16.875
3.94
12
3/8-16
4
14.250
+0.005
0.006
0.006
15.88
15.000
3.94
12
3/8-16
5
12.375
+0.005
0.006
0.006
14.00
13.125
2.81
8
3/8-16
6
10.500
+0.005
0.006
0.006
12.12
11.250
2.81
8
3/8-16



 
                
SAE Standards   :: Drawings

Engine Mountings  ::  Engine Flywheel Housings-SAE J617b                 Click For Drawings
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