Standard Torque Charts And Conversion Tables - Komatsu 830E-AC Shop Manual

STANDARD TORQUE CHARTS AND CONVERSION TABLES

This manual provides U.S. standard and metric (SI)
units for most specifications.
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.
Standard torque values are not to be used when "turn-
of-the-nut" tightening procedures are recommended.
INDEX OF TABLES
Table I . . . . . . . .Standard Torque Chart (SAE) . . A5-1
Table II. . .Standard Torque, 12-Point, Grade 9 . . A5-2
Table III . . . Standard Metric Assembly Torque . . A5-2
Table IV . . . . . . .JIC Swivel Nuts Torque Chart . . A5-3
Table V . . . . . . . . . Pipe Thread Torque Chart . . A5-3
Table VI . . . . . . . . . O-Ring Boss Torque Chart . . A5-3
Table VII . . . . O-Ring Face Seal Torque Chart . . A5-3
Table VIII . .Torque Conversions (ft lbs to N•m) . . A5-4
Table IX . . Torque Conversions (ft lbs to kg•m) . . A5-4
Table X . . . Pressure Conversions (psi to kPa) . . A5-4
Table XI . . Pressure Conversions (psi to MPa) . . A5-5
Table XII . . . . . . . . Temperature Conversions . . A5-5
Table XIII . . . . Common Conversion Multipliers . . A5-6
Grade 5
Cap- TORQUE -
screw GRADE 5
Thread
ft lbs kg•m
Size
1/4-20 7 0.97
1/4-28 8 1.11
5/16-18 15 2.07
5/16-24 16 2.21
3/8-16 25 3.46
3/8-24 30 4.15
7/16-14 40 5.5
7/16-20 45 6.2
1/2-13 65 9
1/2-20 70 9.7
9/16-12 90 12.4
9/16-18 95 13.1
5/8-11 125 17.3
5/8-18 135 18.7
3/4-10 220 30.4
A05001 11/05
TABLE I. -STANDARD TORQUE CHART
SAE HEX HEAD CAPSCREW AND NUT ASSEMBLY
(LUBRICATED THREADS) - TOLERANCES ±10%
TORQUE -
GRADE 8
N•m ft lbs kg•m N•m
9.5 10 1.38 13.6
10.8 11 1.52 14.9
20.3 21 2.90 28
22 22 3.04 30
34 35 4.84 47
41 40 5.5 54
54 58 8.0 79
61 62 8.57 84
88 90 12.4 122
95 95 13.1 129
122 125 17.3 169
129 135 18.7 183
169 175 24.2 237
183 190 26.2 258
298 310 42.8 420
1 ft lbs = 0.138 kg•m = 1.356 N•m
Standard Torque Charts and Conversion Tables
EFFECT OF SPECIAL LUBRICANTS
On Fasteners and Standard Torque Values
Komatsu 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
during the tightening process.
If special friction-reducing
excessive stress and possible breakage of the
fasteners may result.
When 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 A5-2) on the threads
and seats unless specified otherwise.
Verify threads and tapped holes are free of burrs and
other imperfections before installing hardware.
Cap- TORQUE -
screw GRADE 5
Thread
ft lbs kg•m
Size
3/4-16 235 32.5
7/8-9 350 48.4
7/8-14 375 51.9
1.0-8 525 72.6
1.0-12 560 77.4
1.0-14 570 78.8
1 1/8-7 650 89.9
1 1/8-12 700 96.8
1 1/4-7 910 125.9
1 1/4-12 975 134.8
1 3/8-6 1200 166
1 3/8-12 1310 181
1 1/2-6 1580 219
1 1/2-12 1700 235
lubricants are used,
Grade 8
TORQUE -
GRADE 8
N•m ft lbs kg•m N•m
319 335 46.3 454
475 500 69.2 678
508 530 73.3 719
712 750 103.7 1017
759 790 109.3 1071
773 800 110.6 1085
881 1050 145 1424
949 1140 158 1546
1234 1480 205 2007
1322 1580 219 2142
1627 1940 268 2630
1776 2120 293 2874
2142 2560 354 3471
2305 2770 383 3756
A5-1