OM1032.2 Introduction - Section 1 Standard Charts and Tables Page 1-9 STANDARD CHARTS AND TABLES This manual provides dual dimensioning for most spec- ifications. U.S. standard units are specified first, with metric (SI) units in parentheses. References through- out the manual to standard torques or other standard values will be to one of the following Charts or Tables. For values not shown in any of the charts or tables, standard conversion factors for most commonly used measurements are provided in TABLE XIII, page 1-14.
EFFECT OF SPECIAL LUBRICANTS On Fasteners and Standard Torque Values KOMATSU engineering department does NOT recom- mend the use of special “friction-reducing” lubricants such as, “Copper Coat”, “Never Seize”, and other simi- lar products on the threads of standard fasteners where “standard torque” values are applied. The use of special “friction-reducing” lubricants will sig- nificantly alter the clamping force being applied to fas- teners during the tightening process. INDEX OF TABLES TABLE I . . . . . . .Standard Torque Chart (SAE) . . . 1-9 TABLE II .Standard Torque, 12-Point, Grade 9 . . 1-10 TABLE III . . Standard Metric Assembly Torque . . 1-10 TABLE IV . . . . .
.JIC Swivel Nuts Torque Chart . . 1-11 TABLE V . . . . . . . . .Pipe Thread Torque Chart . . 1-11 TABLE VI . . . . . . . . O-Ring Boss Torque Chart . . 1-11 TABLEVII . . . . O-Ring Face Seal Torque Chart . . 1-11 TABLE VIII . Torque Conversions (ft.lbs. - N.m) . . 1-12 TABLE IX . .Torque Conversions (ft.lbs. - kg.m) . . 1-12 TABLE X . . . Pressure Conversions (psi - kPa) . . 1-12 TABLE XI . . Pressure Conversions (psi - MPa) . . 1-12 TABLE XII . . . . . . . .Temperature Conversions . . 1-13 TABLE XIII . . .Common Conversion Multipliers . .
1-14 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 possi- ble breakage of the fasteners may result. Where 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 1-10) on the threads and seats, unless specified otherwise. NOTE: Always be sure threads of fasteners and tapped holes are free of burrs and other imperfections before assembling.
Standard torque values are not to be used when “Turn-of-the-Nut” tightening procedures are rec- ommended. TABLE I. -STANDARD TORQUE CHART SAE HEX HEAD CAPSCREW AND NUT ASSE Grade 5 (LUBRICATED THREADS) TOLERANCES ±10% Gr Gr TABLE I. -STANDARD TORQUE CHART SAE HEX HEAD CAPSCREW AND NUT ASSE ade 5 (LUBRICATED THREADS) TOLERANCES ±10% M BLY Grade 8 Cap- screw Thread Size TORQUE - GRADE 5 TORQUE - GRADE 8 Cap- screw Thread Size TO G R R QUE - ADE 5 TORQUE - GRADE 8 ft. lbs. kg.m N.m ft. lbs. kg.m N.m ft. lbs. k g.m N.m ft. lb s.
kg.m N.m 1/4-20 7 0.97 9.5 10 1.38 13.6 3/4-16 235 3 2.5 319 33 5 46.3 454 1/4-28 8 1.11 10.8 11 1.52 14.9 7/8-9 350 4 8.4 475 50 0 69.2 678 5/16-18 15 2.07 20.3 21 2.90 28 7/8-14 375 5 1.9 508 53 0 73.3 719 5/16-24 16 2.21 22 22 3.04 30 1.0-8 525 7 2.6 712 75 0 103.7 1017 3/8-16 25 3.46 34 35 4.84 47 1.0-12 560 7 7.4 759 79 0 109.3 1071 3/8-24 30 4.15 41 40 5.5 54 1.0-14 570 7 8.8 773 80 0 110.6 1085 7/16-14 40 5.5 54 58 8.0 79 1 1/8-7 650 8 9.9 881 105 0 145 1424 7/16-20 45 6.2 61 62 8.57 84 1 1/8-12 700 9 6.8 949 114 0 158 1546 1/2-13 65 9 88 90 12.4 122 1 1/4-7 910 12 5.9 1234 148 0 205 2007 1/2-20 70 9.7 95 95 13.1 129 1 1/4-12 975 13 4.8 1322 158 0 219 2142 9/16-12 90 12.4 122 125 17.3 169 1 3/8-6 1200 1 66 1627 194 0 268 2630 9/16-18 95 13.1 129 135 18.7 183 1 3/8-12 1310 1 81 1776 212 0 293 2874 5/8-11 125 17.3 169 175 24.2 237 1 1/2-6 1580 2 19 2142 256 0 354 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