Introduction - Section 1 OM1030.2 Page 1-10 Standard Charts and Tables Standard Assembly Torques For 12-Point, Grade 9, Standard Metric Assembly Torque For Class 10.9 Capscrews (SAE) Capscrews & Class 10 Nuts The following specifications apply to required assembly The following specifications apply to required assembly torques for all 12-Point, Grade 9 (170,000 psi minimum torques for all metric Class 10.9 finished hexagon head tensile), Capscrews. capscrews and Class 10 nuts. • Capscrew threads and seats SHALL be lubricated • Capscrew threads and seats SHALL NOT be lubri- when assembled. cated when assembled.
These specifications are based on all capscrews, nuts, and hardened Unless instructions specifically recommend otherwise, washers being phosphate and oil coated.NOTE: these standard torque values are to be used with If zinc-plated hardware is used, each piece must simple lithium base chassis grease (multi-purpose EP be lubricated with a Rust Preventive Grease or NLGI) or a rust- preventive grease (see list, this page) Lithium-base grease to achieve the same clamp- on the threads. ing forces provided below. • Torques are calculated to give a clamping force of • Torques are calculated to give a clamping force of approximately 75% of proof load. approximately 75% of proof load.
• The maximum torque tolerance shall be æ10% of • The maximum torque tolerance shall be within the torque value shown. ±10% of the torque value shown. TABLE III. - STANDARD METRIC ASSEMBLY TORQUE TABLE II. - STANDARD ASSEMBLY TORQUE for 12-Point, Grade 9 Capscrews CAPSCREW TORQUE TORQUE TORQUE SIZE* N.m ft.lbs. kg.m CAPSCREW TORQUE TORQUE TORQUE M6 x1 12 9 1.22 SIZE* ft. lbs.
N.m kg.m M8 x 1.25 30 22 3.06 0.250 - 20 12 16 1.7 M10 x 1.5 55 40 5.61 0.312 - 18 24 33 3.3 M12 x 1.75 95 70 9.69 0.375 - 16 42 57 5.8 M14 x 2 155 114 15.81 0.438 -14 70 95 9.7 M16 x 2 240 177 24.48 0.500 -13 105 142 14.5 M20 x 2.25 465 343 47.43 0.562 - 12 150 203 20.7 M24 x 3 800 590 81.6 0.625 - 11 205 278 28.3 M30 x 3.5 1600 1180 163.2 0.750 - 10 360 488 49.7 M36 x 4 2750 2028 280.5 0.875 - 9 575 780 79.4 * Shank Diameter (mm) - Threads per millimeter 1.000 - 8 860 1166 119 This table represents standard values only. Do not use these val- 1.000 - 12 915 1240 126 ues to replace torque values which are specified in assembly 1.125 - 7 1230 1670 170 instructions.
1.125 - 12 1330 1800 184 1.250 - 7 1715 2325 237 Suggested* Sources for Rust Preventive Grease: 1.250 - 12 1840 2495 254 • AMERICAN ANTI-RUST GREASE #3-X from 1.375 - 6 2270 3080 313 Standard Oil Company (also American Oil Co.) 1.375 - 12 2475 3355 342 • GULF NORUST #3 from Gulf Oil Company. 1.500 - 6 2980 4040 411 • MOBILARMA 355, Product No. 66705 from Mobil 1.500 - 12 3225 4375 445 Oil Corporation. * Shank Diameter (in.) - Threads per inch • RUST BAN 326 from Humble Oil Company. This table represents standard values only. Do not use these val- • RUSTOLENE B GREASE from Sinclair Oil Com- ues to replace torque values which are specified in assembly instructions. pany.
• RUST PREVENTIVE GREASE - CODE 312 from the Southwest Grease and Oil Company. * NOTE: This list represents the current Engineering approved sources for use in Komatsu manufacture. It is not exclusive. Other products may meet the same specifications of this list. CAPSCREW SIZE* TORQUE N.m TORQUE ft.lbs. TORQUE kg.m M6 x1 12 9 1.22 M8 x 1.25 30 22 3.06 M10 x 1.5 55 40 5.61 M12 x 1.75 95 70 9.69 M14 x 2 155 114 15.81 M16 x 2 240 177 24.48 M20 x 2.25 465 343 47.43 M24 x 3 800 590 81.6 M30 x 3.5 1600 1180 163.2 M36 x 4 2750 2028 280.5 * Shank Diameter (mm) - Threads per millimeter This table represents standard values only.
Do not use these val- ues to replace torque values which are specified in assembly instructions. CAPSCREW SIZE* TORQUE ft. lbs. TORQUE N.m TORQUE kg.m 0.250 - 20 12 16 1.7 0.312 - 18 24 33 3.3 0.375 - 16 42 57 5.8 0.438 -14 70 95 9.7 0.500 -13 105 142 14.5 0.562 - 12 150 203 20.7 0.625 - 11 205 278 28.3 0.750 - 10 360 488 49.7 0.875 - 9 575 780 79.4 1.000 - 8 860 1166 119 1.000 - 12 915 1240 126 1.125 - 7 1230 1670 170 1.125 - 12 1330 1800 184 1.250 - 7 1715 2325 237 1.250 - 12 1840 2495 254 1.375 - 6 2270 3080 313 1.375 - 12 2475 3355 342 1.500 - 6 2980 4040 411 1.500 - 12 3225 4375 445 * Shank Diameter (in.) - Threads per inch This table represents standard values only.
Do not use these val- ues to replace torque values which are specified in assembly instructions.