Ammann Rammax 1515-M - Appendix; Tightening Torques

97
Rammax 1515-M/-MC/-MI/-MCI
Index: a; Issued 08/2010
appendix
Tightening torques
Torque for bolts with standard metric threads
Bolt
dimension
Tightening torques Nm Tightening torques ft-lb
8.8 10.9 12.9 8.8 10.9 12.9
M 4 3 5 5 2 3 4
M 5 6 9 10 4 7 7
M 6 10 15 18 7 11 13
M 8 25 35 45 18 26 33
M10 50 75 83 37 55 61
M12 88 123 147 65 91 108
M14 137 196 235 101 145 173
M16 211 300 358 156 221 264
M18 290 412 490 213 303 361
M20 412 578 696 304 426 513
M22 560 785 942 413 559 695
M24 711 1000 1200 524 798 885
M27 1050 1480 1774 774 1092 1308
M30 1420 2010 2400 1047 1482 1770
Strength classes for bolts with untreated, unlubricated
surface.
8.8 = 8G ; 10.9 = 10K ; 12.9 = 12K
The values represent 90% utilisation of the bolt yield strength
with a coefcient of friction of μ ges. = 0.14. Adherence to
the tightening torque levels is checked using a torque wrench.
The specied tightening torques do not apply if MoSo2 lubri-
cant is used.