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What are the parts of a spring joint caliper?

What are the parts of a spring joint caliper?

Detailed image of a jenny caliper and spring point caliper.

Inside and outside spring joint caliper is made up of several standard parts. These include the legs, threaded rod, adjusting nut and the spring. Read our full guide to the parts of a spring joint caliper below along with each parts purpose.


  The legs of the caliper are joined together with a circular spring at the top of the tool. 

Adjusting Nut and Threaded Rod

When the adjusting nut is twisted, the nut and threading rod work together to compress or expand the spring which opens or closes the legs of the caliper.


The legs are the measuring faces of the caliper. The distance between them is adjusted when the nut is twisted.

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