OM1200 3/05 Standard Charts and Tables - Section 12 Page 12-1 STANDARD CHARTS AND TABLES This manual provides dual dimensioning for most specifications. U.S. standard units are specified first, with metric (SI) units in parentheses. EFFECT OF SPECIAL LUBRICANTS On Fasteners and Standard Torque Values The Komatsu engineering department does not recommend the use of special friction-reducing lubricants, such as Copper Coat, Never-Seez®, and other similar products, on the threads of standard fasteners where standard torque values are applied. The use of special friction-reducing lubricants will significantly alter the clamping force being applied to fasteners during the tightening process.
References throughout the manual to standard torques or other standard values will be to one of the following charts or tables. For values not shown in these charts or tables, standard conversion factors for most commonly used measurements are provided in TABLE XIII, page 12-6. Standard torque values are not to be used when “turn- of-the-nut” tightening procedures are recommended. If special friction-reducing lubricants are used with the standard torque values listed below in Table I (and in Komatsu shop manuals), excessive stress and possible breakage of the fasteners may result. INDEX OF TABLES TABLE I . . . . . . . Standard Torque Chart (SAE) . . 12-1 TABLE II .
Standard Torque, 12-Point, Grade 9 . . 12-2 TABLE III . . Standard Metric Assembly Torque . . 12-2 TABLE IV . . . . . .JIC Swivel Nuts Torque Chart . . 12-3 TABLE V . . . . . . . . .Pipe Thread Torque Chart . . 12-3 TABLE VI . . . . . . . . O-Ring Boss Torque Chart . . 12-3 TABLEVII . . . . O-Ring Face Seal Torque Chart . . 12-3 TABLE VIII . Torque Conversions (ft lbs to N•m) . . 12-4 TABLE IX . Torque Conversions (ft lbs to kg•m) . . 12-4 TABLE X . . Pressure Conversions (psi to kPa) . . 12-4 TABLE XI . Pressure Conversions (psi to MPa) . . 12-5 TABLE XII . . . . . . . .Temperature Conversions . . 12-5 TABLE XIII . . .Common Conversion Multipliers . .
12-6 Where the torque tables specify “Lubricated Threads” for the standard torque values listed, 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, page 12-2) on the threads and seats unless specified otherwise. NOTE: Ensure the threads of fasteners and tapped holes are free of burrs and other imperfections before assembling. Gr TABLE I.
STANDARD TORQUE CHART SAE HEX HEAD CAP SCREW AND NUT ASSEMBLY ade 5 (LUBRICATED THREADS) Grade TOLERANCES ±10% 8 Capscrew TORQUE - TORQUE - Capscrew TORQUE - TORQUE - Thread GRADE 5 GRADE 8 Thread GRADE 5 GRADE 8 Size ft lbs kg•m N•m ft lbs kg•m N•m Size ft lbs kg•m N•m ft lbs kg•m N•m ft lbs kg•m N•m ft lbs kg•m N•m ft lbs kg•m N•m ft lbs kg•m N•m 1/4-20 7 0.97 9.5 10 1.38 13.6 3/4-16 235 32.5 319 335 46.3 454 1/4-28 8 1.11 10.8 11 1.52 14.9 7/8-9 350 48.4 475 500 69.2 678 5/16-18 15 2.07 20.3 21 2.90 28 7/8-14 375 51.9 508 530 73.3 719 5/16-24 16 2.21 22 22 3.04 30 1.0-8 525 72.6 712 750 103.7 1017 3/8-16 25 3.46 34 35 4.84 47 1.0-12 560 77.4 759 790 109.3 1071 3/8-24 30 4.15 41 40 5.5 54 1.0-14 570 78.8 773 800 110.6 1085 7/16-14 40 5.5 54 58 8.0 79 1 1/8-7 650 89.9 881 1050 145 1424 7/16-20 45 6.2 61 62 8.57 84 1 1/8-12 700 96.8 949 1140 158 1546 1/2-13 65 9 88 90 12.4 122 1 1/4-7 910 125.9 1234 1480 205 2007 1/2-20 70 9.7 95 95 13.1 129 1 1/4-12 975 134.8 1322 1580 219 2142 9/16-12 90 12.4 122 125 17.3 169 1 3/8-6 1200 166 1627 1940 268 2630 9/16-18 95 13.1 129 135 18.7 183 1 3/8-12 1310 181 1776 2120 293 2874 5/8-11 125 17.3 169 175 24.2 237 1 1/2-6 1580 219 2142 2560 354 3471 5/8-18 135 18.7 183 190 26.2 258 1 1/2-12 1700 235 2305 2770 383 3756 3/4-10 220 30.4 298 310 42.8 420 1 ft.
lbs. = 0.138 kg•m = 1.356 N•m