Starrett PT22429 Dovetail Body Clamp for Test Indicators, 3/

Starrett PT22429 Dovetail Body Clamp is used to mount Starrett 708, 709 and 811 test gauges, sold separately. The body clamp has a 3/4" shank for use in hose clamps or surface gauges. Test indicators, also known as measuring instruments, are precision instruments that measure short linear distances. They are commonly used to detect tolerance deviations, such as small variations in flatness or height of a tested part, and allow measurement in narrow grooves or small holes. A test indicator consists of a ball bearing contact point on a lever arm, also called a measuring insert, which is pivotable from a hinge point. The indicator indicates the degree of angle displacement of the arm. Test pointers are often used in manufacturing, machining, and mechanical engineering. Standard test indicators measure the displacement of the arm perpendicular to the axis of the turn signal. The dial and electronic indicators are very similar to testanators, except that the measurement axis is parallel to the indicator axis. Test indicators can be analog, with mechanical or electronic dial, with digital display. Some electronic models electronically transmit data to a computer for recording and potential manipulation. The L. S. Starrett Company manufactures precision measuring tools, measuring and testing equipment, and saw blade products. Founded in 1880, the company is based in Athol, MA.