4.10 Radius Gages
D.M. Donner
Radius gages are used to gage radii on machined parts. These sets come in inch as well as metric measurements. Inch sizes come in decimal or fractional. It is very common to use all three sets to gage a tight tolerance radius due to the larger resolution.
The figure above is an example of a radius gage. This one is .500″. There are five radius examples on each gage. This allows the gage to measure both inside and outside radii.