Nut Dilation 1

[dclayman]

Are there any standard formulae for estimating nut dilation or radial displacement of a nut? Torque is known, and thread geometry can be measured. Coeff. of friction can be estimated from textbook. Thanks.

 

[CoryPad]

The methods for calculating nut dilation are contained in the following reference:

"Analysis and Design of Threaded Assemblies", E.M. Alexander, 1977 SAE Transactions, Paper No. 770420.

ISO 898-2 Mechanical properties of fasteners - Part 2: Nuts with specified proof load values - Coarse thread has some background information on this subject.