DRIVING TORQUES FOR SCREWS AND NUTS 4.4 DRIVING TORQUES FOR SCREWS AND NUTS 4.4.1 STANDARD DRIVING TORQUES 4.4.2 SPECIFIC TIGHTENING TORQUES 151 # Nm (Newton metre):
1 Nm = 0,102 kgm Thread diameter (mm) Pitch (mm) Spanner size (mm) 8.8 10.9 kgm Nm kgm Nm 6 8 10 12 14 1 1.25 1.5 1.75 2 10 13 17 19 22 0.96 ± 0.1 2.3 ± 0.2 4.6 ± 0.5 7.8 ± 0.8 12.5 ± 1 9.5 ± 1 23 ± 2 45 ± 4.9 77 ± 8 122 ± 13 1.3 ± 0.15 3.2 ± 0.3 6.5 ± 0.6 11 ± 1 17.5 ± 2 13.5 ± 1.5 32.2 ± 3.5 63 ± 6.5 108 ± 11 172 ± 18 16 18 20 22 24 2 2.5 2.5 2.5 3 24 27 30 32 36 19.5 ± 2 27 ± 3 38 ± 4 52 ± 6 66 ± 7 191 ± 21 262 ± 28 372 ± 40 511 ± 57 644 ± 70 27 ± 3 37 ± 4 53 ± 6 73 ± 8 92 ± 10 268 ± 29 366 ± 36 524 ± 57 719 ± 80 905 ± 98 27 30 3 3.5 41 46 96 ± 10 131 ± 14 945 ± 100 1287 ± 140 135 ± 15 184 ± 20 1329 ± 140 1810 ± 190 IMPORTANT • This driving torque table is not valid for screws or nuts that must lock nylon parts or alike onto washers or components made of nylon or nonferrous materials.
ITEM DESCRIPTION kgm Nm Cab Front support screws Rear support screws 20 ± 1 20 ± 1 196 ± 9.8 196 ± 9.8 Wheels Front Rear 35.7± 1 51 ± 1 350 ± 9.8 500 ± 9.8 Front bucket Teeth 14.5 ± 1 143 ± 9.8 Backhoe bucket Central teeth Side teeth 14.5 ± 1 14.5 ± 1 143 ± 9.8 143 ± 9.8 Engine and transmission Front support central screw Rear support central screw 20 ± 1 20 ± 1 196 ± 9.8 196 ± 9.8