Komatsu 830E-1AC Operation & Maintenance Manual page 14

Torque Tables And Conversion Charts - Section 12
Page 12-4
STANDARD TIGHTENING TORQUES
For SAE Grade 9 Cap screws
The following specifications apply to required assem-
bly torques for all 12-point, grade 9 (170,000 psi min-
imum tensile), cap screws.
• Cap screw threads and seats shall be lubricated
when assembled.
Unless instructions
otherwise, these standard torque values are to be
used with simple lithium base chassis grease (multi-
purpose EP NLGI) or a rust- preventive grease (see
list, this page) on the threads.
• Torques are calculated to give a clamping force
of approximately 75% of proof load.
• The maximum torque tolerance shall be ±10% of
the torque value shown.
TABLE 3.
Standard Tightening Torque
for 12-Point, Grade 9 Cap Screws
Torque
Cap Screw Size*
N·m
0.250 - 20 16
0.312 - 18 33
0.375 - 16 57
0.438 -14 95
0.500 -13 142
0.562 - 12 203
0.625 - 11 278
0.750 - 10 488
0.875 - 9 780
1.000 - 8 1166
1.000 - 12 1240
1.125 - 7 1670
1.125 - 12 1800
1.250 - 7 2325
1.250 - 12 2495
1.375 - 6 3080
1.375 - 12 3355
1.500 - 6 4040
1.500 - 12 4375
* Shank Diameter (in.) - Threads per inch
specifically recommend
Torque Torque
ft lb kg·m
12 1.7
24 3.3
42 5.8
70 9.7
105 14.5
150 20.7
205 28.3
360 49.7
575 79.4
860 119
915 126
1230 170
1330 184
1715 237
1840 254
2270 313
2475 342
2980 411
3225 445
02/11 OM1200