Print...
Copy data to clipboard: Click - as simple text Ctrl+Click - compressed Shift+Click - as link
Paste data from clipboard
Example calculation

Calculation of tightening torques and bolt forces

according to VDI 2230 Part 1
considering scatter of torque, and friction coefficients

Input data

  Bolt type      mm
  Nominal diameter of the screw thread dN   mm
  Thread pitch Ph   mm
  Pitch diameter of the screw thread d2   mm
  Root diameter of the screw thread d3   mm
  Neck diameter dT   mm
  Outer diameter of the bolt head or nut dw   mm
  Through-hole diameter dh   mm
  Half angle of the thread β/2   °
  Minimum yield strength of the bolt material Rp0,2   MPa
  Minimum required bolt force FVM min   kN
  Maximum allowable bolt force FVM max   kN
 

Tightening parameter combinations:

  Combination number  
  Tightening torque scatter [?]      ±%
  Minimum friction coefficient for thread μG min [?]  
  Maximum friction coefficient for thread μG max  
  Minimum friction coefficient for joint face μK min  
  Maximum friction coefficient for joint face μK max  
 
 
 

Results

  Combination number  
  Allowable bolt tightening torque MA all   N·m
  Tightening torque for the minimum bolt force MA min   N·m
  Tightening torque for the maximum bolt force MA max   N·m
www.pvp-software.de
© Lau Engineering Solutions GmbH