TRAPP TR 500 - Page 78

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78
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Torque Specications
For proper screw tightening, use an adequate torque wrench and the values listed in the tables below:
Screw torques - metric - coarse thread - UNC
Thread
Resistance class - 8.8
N.m lbf.ft
M6 10.6 7.8
M8 25.6 18.8
M10 51.2 37.7
M12 88.0 64.9
M14 138.0 101.7
M16 210.0 154.8
These are guiding values, and are based on average conditions of steel-to-steel friction.
Screw torques - Inches
Thread
Resistance class
Coarse thread- UNC Fine thread - UNF
Grade 5 Grade 8 Grade 5 Grade 8
N.m lbf.ft N.m lbf.ft N.m lbf.ft N.m lbf.ft
1/4 12.1 8.9 17.0 12.5 13.5 9.9 18.9 13.9
5/16 23.9 17.6 33.9 25.0 25.9 19.1 36.6 26.9
3/8 41.5 30.6 58.4 43.0 45.7 33.7 64.2 47.3
1/2 101.0 74.4 141.0 104.0 110.0 81.1 155.0 114.3
9/16 143.0 105.4 201.0 154.8 155.0 114.3 219.0 161.5
5/8 199.0 146.7 280.0 206.5 219.0 161.5 308.0 227.1
These are guiding values, and are based on average conditions of steel-to-steel friction.
Attention!
 All maintenance or cleaning should be done with the power off and the spark plug wire disconnected.
 Disposal of oil and oil containers should follow the oil manufacturer’s instructions on disposal. Do not
discharge on the floor or in the common trashcan.