Page 105 - GarlockFluidSealing2010

C-45
Load on Machine Bolts and Cold Rolled Steel Stud Bolts Under Torque
Stress
Nominal Number Diameter Area 7,500 psi 15,000 psi 30,000 psi
Diameter of Threads of Root at Root Clamping Clamping Clamping
of Bolt Per Inch of Thread of Thread Torque Force Torque Force Torque Force
(inches) (inches) (sq. in.) (ft. lbs.) (lbs./bolt) (ft. lbs.) (lbs./bolt) (ft. lbs.) (lbs./bolt)
1/4 20 0.185 0.027 1 203 2 405 4 810
5/16 18 0.240 0.045 2 338 4 675 8 1,350
3/8 16 0.294 0.068 3 510 6 1,020 12 2,040
7/16 14 0.345 0.093 5 698 10 1,395 20 2,790
1/2 13 0.400 0.126 8 945 15 1,890 30 3,780
9/16 12 0.454 0.162 12 1,215 23 2,430 45 4,860
5/8 11 0.507 0.202 15 1,515 30 3,030 60 6,060
3/4 10 0.620 0.302 25 2,265 50 4,530 100 9,060
7/8 9 0.731 0.419 40 3,143 80 6,285 160 12,570
1 8 0.838 0.551 62 4,133 123 8,265 245 16,530
1-1/8 7 0.939 0.693 98 5,190 195 10,380 390 20,760
1-1/4 7 1.064 0.890 137 6,675 273 13,350 545 26,700
1-3/8 6 1.158 1.054 183 7,905 365 15,810 730 31,620
1-1/2 6 1.283 1.294 219 9,705 437 19,410 875 38,820
1-5/8 5-1/2 1.389 1.515 300 11,363 600 22,725 1,200 45,450
1-3/4 5 1.490 1.744 390 13,080 775 26,160 1,550 52,320
1-7/8 5 1.615 2.049 525 15,368 1,050 30,735 2,100 61,470
2 4-1/2 1.711 2.300 563 17,250 1,125 34,500 2,250 69,000
Load on Alloy Steel Stud Bolts Under Torque
Stress
Nominal Number Diameter Area 30,000 psi 45,000 psi 60,000 psi
Diameter of Threads of Root at Root Clamping Clamping Clamping
of Bolt Per Inch of Thread of Thread Torque Force Torque Force Torque Force
(inches) (inches) (sq. in.) (ft. lbs.) (lbs./bolt) (ft. lbs.) (lbs./bolt) (ft. lbs.) (lbs./bolt)
1/4 20 0.185 0.027 4 810 6 1,215 8 1,620
5/16 18 0.240 0.045 8 1,350 12 2,025 16 2,700
3/8 16 0.294 0.068 12 2,040 18 3,060 24 4,080
7/16 14 0.345 0.093 20 2,790 30 4,185 40 5,580
1/2 13 0.400 0.126 30 3,780 45 5,670 60 7,560
9/16 12 0.454 0.162 45 4,860 68 7,290 90 9,720
5/8 11 0.507 0.202 60 6,060 90 9,090 120 12,120
3/4 10 0.620 0.302 100 9,060 150 13,590 200 18,120
7/8 9 0.731 0.419 160 12,570 240 18,855 320 25,140
1 8 0.838 0.551 245 16,530 368 24,795 490 33,060
1-1/8 8 0.963 0.728 355 21,840 533 32,760 710 43,680
1-1/4 8 1.088 0.929 500 27,870 750 41,805 1,000 55,740
1-3/8 8 1.213 1.155 680 34,650 1,020 51,975 1,360 69,300
1-1/2 8 1.338 1.405 800 42,150 1,200 63,225 1,600 84,300
1-5/8 8 1.463 1.680 1,100 50,400 1,650 75,600 2,200 100,800
1-3/4 8 1.588 1.980 1,500 59,400 2,250 89,100 3,000 118,800
1-7/8 8 1.713 2.304 2,000 69,120 3,000 103,680 4,000 138,240
2 8 1.838 2.652 2,200 79,560 3,300 119,340 4,400 159,120
2-1/4 8 2.088 3.423 3,180 102,690 4,770 154,035 6,360 205,380
2-1/2 8 2.338 4.292 4,400 128,760 6,600 193,140 8,800 257,520
2-3/4 8 2.588 5.259 5,920 157,770 8,800 236,655 11,840 315,540
3 8 2.838 6.324 7,720 189,720 11,580 284,580 15,440 379,440
Values shown in these tables are based on steel bolting that has been
well-lubricated with heavy graphite and oil mixture. Research has shown
that a non-lubricated bolt has about 50% of the effciency of a well-lu-
bricated bolt. It has been further found that different lubricants produce
results varying between the limit of 50% and 100% of the tabulated
stress fgures.
These tables are for reference only. See torque tables for recommended
installation torques.
Bolt Stress to Bolt Torque Conversion Tables