BOLTCALC Demo Program
13.9 MB Install File

The program allows you to try out the features of the program for 30 days.


(Adobe PDF - opens in a separate window)

The brochure provides further details about the capabilities of the BOLTCALC program.

Open the Brochure

Training on the BOLTCALC Program

Training material relating to the program is coming soon.

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Example Problems
Coming soon

A range of example problems and solutions are being created.

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Featured Highlights

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Self-loosening of nuts and bolts
A major problem in many industries

A key advantage of threaded fasteners over the majority of other joining methods is that they can be dis-assembled and re-used. Unintentionally self-loosening has been a problem since the start of the industrial revolution and for the last 150 years inventors have been devising ways in which it can be prevented. The program will assist in preventing self-loosening by providing information to allow the joint to be engineered such that the causes of self-loosening will not arise.

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Bolt Fatigue Issues
A common cause of bolt failure

The program can assist in solving bolt fatigue issues. Fatigue is typically quoted as the commonest reason for bolts to fail in service. In the vast majority of applications, the most effective way to ensure that the bolt is fatigue resistant is to ensure that it is tightened sufficiently. The BOLTCALC program checks for this condition as well as determining the alternating stress in the critical thread section and compares with the bolt's endurance limit determined by the program.

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Tightening Issues
Use torque or other method

Deciding whether a particular tightening torque is optimal is often problematic. The BOLTCALC program determines both tensile stress due to the elongation of the fastener, and the torsional stress due to the applied torque. It accounts for the frictional effects in the thread and between the nut face and clamped surface. Account can also be made for the effects of a reduced shank diameter (smaller than the thread size) and a prevailing torque. (The prevailing torque is the torque required to run a nut down a thread before engagement with the joint surface.)

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