ADS 70 / ACR 70 D 21
Maintenance :
8.0 Screw torques for screws with metric threads
Screw
Dimensions
Torques Nm
8.8 10.9 12.9
M4 3 5 5
M5 6 9 10
M6 10 15 18
M8 25 35 45
M10 50 75 83
M12 88 123 147
M14 137 196 235
M16 211 300 358
M18 290 412 490
M20 412 578 696
M22 560 785 942
M24 711 1000 1200
M27 1050 1480 1774
M30 1420 2010 2400
Screw
dimensions
Torques ft-lb
8.8 10.9 12.9
M4 2 3 4
M5 4 7 7
M6 7 11 13
M8 18 26 33
M10 37 55 61
M12 65 91 108
M14 101 145 173
M16 156 221 264
M18 213 303 361
M20 304 426 513
M22 413 559 695
M24 524 798 885
M27 774 1092 1308
M30 1047 1482 1770
Property classes for screws with non treated, non greased surface. The screw’s quality marks appear on the
screw heads.
8.8 = 8G; 10.9 = 10K; 12.9 = 12K
The values give a 90 % utilization of the screw’s apparent yielding point at a coefficient of friction of
μ total = 0,14.
Observance of the screw torques is controlled by torquemeter. When lubricant MoSo2 is used, the indicated
screw torques do not apply.
Note : Always renew self-locking nuts after disassembly !
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