Radius gauge

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Two types of radius gauges
Two types of radius gauges

A radius gauge is a tool used to measure the radius of an object.

Radius gauges require a bright light behind the object to be measured. The gauge is placed against the edge to be checked and any light leakage between the blade and edge indicates a mismatch that requires correction.

A good set of gauges will offer both convex and concave sections, and allow for their application in awkward locations.