Brown & Sharpe TESA 74.108943 Reducing Sleeve for Dial Test Indicator, 4mm to 3/8"

The Brown & Sharpe TESA 74.108943 reducing sleeve adapts dial test indicators with a 4 mm stem diameter stem for use with 3/8" mounting hardware. The adapter-style sleeve fits directly on the 4 mm diameter indicator stem for a secure hold. The sleeve is compatible with Interapid 312 horizontal lever-type inch dial test indicators with 4 mm stem diameter and model numbers 74.111508 to 74.111511, 74.111513, and 74.111514.

Test indicator gauges, also called gages, are precision instruments that measure short linear distances. They are commonly used for detecting deviations from tolerance limits, such as small variations in flatness or height of an inspected workpiece, and permit measurement in narrow grooves or small bores. A test indicator gauge consists of a ball-tipped contact point on a levered arm, also called a measuring insert, which pivots from a hinge point. The reading indicates the degree of angular displacement of the arm. Test indicator gauges are commonly used in manufacturing, machining, and mechanical engineering. Standard test indicators measure the displacement of the arm perpendicular to the axis of the indicator. Dial and electronic indicators are very similar to test indicators, except that the axis of measurement is parallel to the axis of the indicator. Test 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.

Brown & Sharpe manufactures precision measuring equipment and metrology hand tools. The company, founded in 1833, is headquartered in North Kingstown, RI.