What is the purpose of a gauge in machining?

The purpose of a gauge in machining is to check dimensions and ensure conformity to specifications. Gauges are precision instruments used to measure the size, shape, and physical properties of manufactured parts. They help machinists verify that components meet specified tolerances and dimensions, which is crucial for ensuring that the final product functions correctly and fits with other parts.

Using a gauge promotes quality control in the machining process, allowing for adjustments if a part does not meet required specifications. This quality assurance helps avoid issues such as poor fit, premature wear, or failure in the assembly of parts, which could be costly and time-consuming to rectify later in the production process.

Gauges come in various forms, including calipers, micrometers, and plug or ring gauges, each designed for specific applications to measure different aspects of the workpiece accurately.