The interchangeable contact points used with dial test indicators provide adaptability in measurement applications. These small, precisely manufactured components, often threaded, attach to the indicator’s stylus and directly interface with the workpiece. Variations in shape, size, and material allow for optimal contact and accurate readings on diverse surfaces and in constricted spaces. For example, a spherical tip might be chosen for general surface measurements, while a needle-point tip is suitable for accessing narrow grooves or locating centers.
Proper selection is critical for achieving accurate and repeatable measurements. Different designs minimize errors caused by surface irregularities, geometry, or material properties. The use of appropriate attachments protects the indicator itself from damage and prolongs its lifespan. Historically, these components evolved alongside the development of precision manufacturing, reflecting the increasing need for refined dimensional control across various industries.
