Emerson Bettis 500 - Page 98

February 2018
Installation and Operation Manual
E2K-405-0218 Rev. 2
90
Appendix
Appendix
Grade 1 Grade 2 Grades 5, 5.2 & 5.1 Grades 8, 8.1 & 8.2
Thread Size &
Pitch
Clamp Load (lb)
Tightening
Torque (ft-lb)
Clamp Load (lb)
Tightening
Torque (ft-lb)
Clamp Load (lb)
Tightening
Torque (ft-lb)
Clamp Load (lb)
Tightening
Torque (ft-lb)
6 - 40 251 0.58 419 0.96 647 1.49 914 2.10
8 - 36 365 1.00 608 1.66 940 2.57 1327 3.63
10 - 32 495 1.57 825 2.61 1275 4.04 1800 5.70
12 - 28 639 2.30 1064 3.83 1645 5.92 2322 8.36
1/4 - 28 901 3.75 1502 6.26 2321 9.7 3276 13.7
5/16 - 24 1436 7.48 2393 12.5 3698 19.3 5220 27.2
3/8 - 24 2173 13.6 3622 22.6 5597 35.0 7902 49.4
7/16 - 20 2938 21.4 4896 35.7 7567 55.2 10683 77.9
1/2 - 20 3958 33.0 6596 55.0 10194 84.9 14391 120
9/16 - 18 5024 47.1 8374 78.5 12941 121 18270 171
5/8 - 18 6336 66.0 10560 110 16320 170 23040 240
3/4 - 16 9232 115 9232 115 23779 297 33570 420
7/8 - 14 12598 184 12598 184 32449 473 45810 668
1 - 12 16409 273 16409 273 36797 613 59670 995
1-1/8 - 12 21186 397 21186 397 47508 891 77040 1445
1-1/4 - 12 26557 553 26557 553 59552 1241 96570 2012
1-3/8 - 12 32546 746 32546 746 72983 1673 118350 2712
1-1/2 - 12 39130 978 39130 978 87746 2194 142290 3557
English Units: (Fine Thread Series)
Tightening Torque = K * D * P
K = 0.2 (dry, unlubricated)
Clamp Load (P) = 75% of the Proof Load
D = Nominal Thread Size
The values presented in these tables are representative and have been compiled for the user’s benet. Results can be inuenced by
any number of variables including 1) excessive lubrication, 2) excessive design clamp load, 3) nicked or binding threads, 4) non-parallel
mating surfaces, and 5) inadequate torque control, to name a few. Therefore, Load expressly disclaims liability of any kind associated with
the application of the data shown herein.
Class 4.6 Class 5.8 Class 9.8 Class 10.9
Thread Size &
Pitch
Clamp Load (KN)
Tightening
Torque (N*m)
Clamp Load (KN)
Tightening
Torque (N*m)
Clamp Load (KN)
Tightening
Torque (N*m)
Clamp Load (KN)
Tightening
Torque (N*m)
M8 X1 6.64 10.6 11.2 17.9 19.1 30.6 24.4 39.0
M10 X 1.25 10.4 20.7 17.4 34.9 29.8 59.7 38.1 76.2
M12 X 1.25 15.6 37.5 26.2 63.0 44.9 108 57.3 138
M14 X 1.5 21.2 59.3 35.6 100 60.9 171 77.8 218
M16 X 1.5 28.3 90.6 47.6 152 81.4 261 104 333
M18 X 1.5 36.6 132 61.6 222 105 379 134 484
M20 X 1.5 46.1 184 77.5 310 133 530 169 677
M22 X 1.5 56.4 248 94.9 418 162 714 207 912
M24 X 2 65.1 312 109 525 187 899 239 1147
M27 X 2 84.1 454 141 763 242 1306 309 1667
M30 X 2 105 632 177 1062 303 1816 387 2319
M33 X 2 129 851 217 1431 371 2449 474 3127
M36 X 3 147 1056 247 1775 422 3036 538 3877
M39 X 3 175 1362 294 2290 502 3917 641 5001
Metric Units: (Fine Thread Series)
Tightening Torque = K * D * P
K = 0.2 (dry, unlubricated)
Clamp Load (P) = 75% of the Proof Load
D = Nominal Thread Size