A set of six transfer gauge that enables the diameter of holes, bores or grooves to be measured with outside micrometres or callipers. In operation the spring loaded plunger of a gauge is allowed to expand within the feature to be measured and then locked in place using the knurled rotary control on the end of the handle. In practice some manipulation is necessary to ensure that the minimum size has been captured, after which the gauge is carefully withdrawn so that the dimension across the contact surfaces can be measured.
Extra long for gauging deep and shallow holes, slots and similar work
Used for comparison measurement of bore diameter and groove width
Spring-loaded plunger expands within the hole
Knurled clamp allows contacts to be held in position, removed and measured with a micrometre