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Tightening Methods and Tightening Factor αA
Download our technical guide on tightening methods and the tightening factor αA, including a table with guideline values.
596.4 KB | pdfArrangement, Design, and Assembly
Tightening Methods and Tightening Factor αA
Find an overview of guideline values for the tightening factor αA and the resulting preload forces in an assembly according to VDI 2230.
Contents
The tightening factor αA (a factor of uncertainty in assembly) allows for errors in estimating the friction coefficients, the scatter of the coefficients of friction, the tightening method, the equipment tolerances, operational failures, and inaccuracies in reading the values.
This technical guide contains:
- Approximate values for the static coefficient of friction μT in the separation joint
- Guideline values for the tightening factor αA and the resulting preload forces in assembly
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