Intro to Millwright Practice Exam 2026 - Free Millwright Skills Practice Questions and Study Guide

The primary function of a depth micrometer is to measure the depth of holes, grooves, or recesses accurately. It is designed with a slim, pointed spindle that extends below the base of the micrometer, allowing it to fit into narrow spaces to determine how deep a feature goes. This ability to measure depth is essential in machining and fabrication processes, ensuring components meet specific dimensional tolerances.

While measuring length, checking diameter, and measuring angles are important tasks in machining and engineering, they relate to other tools specifically designed for those functions, such as calipers for length and diameter measurement or protractors for angles. Thus, the depth micrometer's unique design and function make it specifically tailored for depth measurements, reinforcing its key role in precision measurement tasks within the field.