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Torque and preload with friction scatter

Calculate tightening torque and preload for hex head and socket head screws.
The calculation considers friction scatter, tool accuracy and scatter on preload.

Based on VDI 2230:2014 

 

Screw type
Clearance hole - ISO 273
Mechanical properties of material, thread size and friction
Property class of screw




Tool precision
Data used in calculation
640
0.8
4.48
4.019
5.5
6.9
14.2
Results
6.2
7.6
-

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