The Starrett 1019M-25 internal dial caliper gauge opens from 25 mm to 75 mm with a 3-1/4” (approximately 80 mm) arm length, and has carbide ball contacts for longer life and wear resistance. The arms reach into the workpiece, such as in bores of castings and inside readings in fabrications, to easily measure small sections of that workpiece. The retraction lever allows for one-handed use and gauge control, while a direct reading dial hand is accurate.
Dial indicators, also called dial gauges or probe indicators, are precision measuring tools used to accurately measure small linear distances and object sizes. The dial magnifies the measurement so that it can more easily be read by the human eye. Frequently used in manufacturing, laboratories, and other industrial or mechanical fields, dial indicators are used anywhere a small measurement must be found and recorded or transferred, such as checking the variation in tolerance of a workpiece. Dial test indicators are very similar to dial indicators, except that the axis of measurement is perpendicular to the axis of the indicator. Standard dial indicators measure the displacement along the axis of the indicator. Dial indicators can be analog, with a mechanical dial, or electronic, with a digital display. Some electronic models transfer the data electronically to a computer for recording and potential manipulation.
The L. S. Starrett Company was founded in 1880, originally manufacturing bench vises, squares, and other tools. They acquired other companies throughout the years, expanding their services into making precision measurement instruments and tools, such as calipers, micrometers, saw blades, and gauges. Starrett is headquartered in Athol, Massachusetts and has manufacturing facilities in Brazil, the United Kingdom, China, and other locations.