stellar labs 7621 - Page 44

Page 40 | Stellar
®
Heavy-Duty Telescopic Crane Owner’s Manual
When using the torque data in the chart, the following rules should be observed:
• Bolt manufacturer’s particular specications should be consulted when provided.
• Flat washers of equal strength must be used.
• All torque measurements are given in foot-pounds. To convert to inch-pounds, multiply
by 12.
• Torque values specied are for bolts with residual oils or no special lubricants applied.
If special lubricants of high stress ability, such as Never-Seez compound graphite and
oil, molybdenum disulphite, colloidal copper or white lead are applied, multiply the
torque values in the charts by the factor .90. The use of Loctite does not affect the
torque values listed above.
• Torque values for socket-head capscrews are the same as for Grade 8 capscrews.
Rotation Gear Bearing Thread Tightening Procedure
Size Bolt DIA Plain Plated Plain Plated Plated
(DIA-TPI) (Inches) (Ft-Lb) (Ft-Lb) (Ft-Lb) (Ft-Lb) (Ft-Lb)
5/16-18 0.31251713251822
3/8-16 0.37503123443339
7/16-14 0.43754937705263
1/2-13 0.50007557 105 80 96
9/16-12 0.5625110 82 155 115 139
5/8-11 0.6250 150 115220 160 192
3/4-10 0.7500 265 200 375 280 340
7/8-9 0.8750 395 295 605 455 549
1-8 1.000 590 445 910 680 823
1 1/8-7 1.1250 795 595 1290 965 1167
1 1/4-7 1.25001120 840 1815 1360 1646
1 3/8-6 1.3750 1470 1100 2380 1780 2158
1 1/2-6 1.500 1950 1460 3160 2370 2865
GRADE 5 GRADE 8 GRADE 9
Courtesy of CraneMarket.com