Standard Assembly Torques For 12-Point, Grade 9, Capscrews (Sae) - Komatsu 930E-2 Shop Manual

Standard Assembly Torques For
12-Point, Grade 9, Capscrews (SAE)
The following specifications appy to required assembly
torques for all 12-Point, Grade 9 (170,000 psi minimum
tensile), Capscrews.
• Capscrew threads and seats SHALL be lubricated
when assembled.
Unless instructions specifically recommend oth-
erwise, 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 II - STANDARD ASSEMBLY TORQUE
for 12-Point, Grade 9, Capscrews
CAPSCREW TORQUE
SIZE* ft. lbs.
0.250 - 20 12
0.312 - 18 24
0.375 - 16 42
0.438 - 14 70
0.500 - 13 105
0.562 - 12 150
0.625 - 11 205
0.750 - 10 360
0.875 - 9 575
1.000 - 8 860
1.000 - 12 915
1.125 - 7 1230
1.125 - 12 1330
1.250 - 7 1715
1.250 - 12 1840
1.375 - 6 2270
1.375 - 12 2475
1.500 - 6 2980
1.500 - 12 3225
* Shank Diameter (in.) - Threads per in.
This Table represents standard values only.
Do not use these values to replace torque values which are
specified in assembly instructions.
A5-2
TORQUE TORQUE
N.m kg.m
16 1.7
33 3.3
57 5.8
95 9.7
142 14.5
203 20.7
278 28.3
488 49.7
780 79.4
1166 119
1240 126
1670 170
1800 184
2325 237
2495 254
3080 313
3355 342
4040 411
4375 445
Standard Torque Charts and Tables
Standard Metric Assembly Torque For
Class 10.9 Capscrews & Class 10 Nuts
The following specifications appy to required assembly
torques for all meteric Class 10.9 finished hexagon
head capscrews and Class 10 nuts.
• Capscrews threads and seats SHALL NOT be
lubricated when assembled. These specifications
are based on all capscrews, nuts, and hardened
washers being phosphate and oil coated.
NOTE: If zinc-plated hardware is used, each
piece must be lubricated with a Rust Preventive
Grease or Lithium-base grease to achieve the
same clamping forces provided below.
• Torques are calculated to give a clamping force of
approximately 75% of proof load.
• The maximum torque tolerance shall be within
±10% of the torque value shown.
TABLE III - STANDARD METRIC ASSEMBLY TORQUE
CAPSCREW TORQUE
SIZE* N.m
M 6 x 1 12
M 8 x 1.25 30
M10 x 1.5 55
M12 x 1.75 95
M14 x 2 155
M16 x 2 240
M20 x2.5 465
M24 x 3 800
M30 x 3.5 1600
M36 x 4 2750
* Shank Diameter (mm) x Threads per mm.
This Table represents standard values only.
Do not use these values to replace torque values which are
specified in assembly instructions.
SUGGESTED* SOURCES FOR
RUST PREVENTIVE GREASE:
• AMERICAN ANTI-RUST GREASE #3-X from
Standard Oil Company (also American Oil Co.)
• GULF NORUST #3 from Gulf Oil Company.
• MOBILARMA 355, Product No. 66705 from
Mobil Oil Corporation.
• RUST BAN 326 from Humble Oil Company.
• RUSTOLENE B GREASE from
Sinclair Oil Company.
• RUST PREVENTIVE GREASE - CODE 312 from
the Southwest Grease and Oil Company.
* NOTE: This list represents the current Engineering
approved sources for use in Haulpak manufacture. It
is not exclusive. Other products may meet the same
specifications of this list.
TORQUE TORQUE
ft. lbs. kg.m
9 1.22
22 3.06
40 5.61
70 9.69
114 15.81
177 24.48
343 47.43
590 81.6
1180 163.2
2028 280.5
A05001 03/01