SPI 25-363-3 0.7-6in 0.0005in Grad 23-Piece Dial Bore Gauge Set

The SPI 25-363-3 is a 3-in-1 dial bore gauge set covering a total measurement range of 0.700" to 6.000" across three interchangeable gauge heads (0.7–1.5", 1.4–2", and 2–6"), all sharing one SPI dial indicator graduated at 0.0005" per division with a 0–0.25" total indicator range. The set includes 23 interchangeable contact anvils sized from 0.7" through 6" in labeled increments visible in the case foam (2.0", 2.2", 2.4", 2.6", 2.8", 3.0", 3.2", 3.4", 3.6", 3.8", 4.0" for the mid-range head; 1.4", 1.6", 1.8", 2.0" for the small head; and fractional extensions for the 0.7–1.5" head), plus extension rods, a centering head with spring-loaded contact rollers, and a flexible universal joint for angled bore access. The gauge bodies feature a knurled insulating grip sleeve to minimize thermal transfer during use, and the dial indicator attaches via a standard friction-fit stem. Typical applications include engine cylinder bore measurement, hydraulic cylinder inspection, bearing housing verification, and general production bore gauging where 0.0005" resolution is sufficient. This unit is new — other condition, complete in the original molded plastic carrying case with all anvils and accessories present as shown.

Product Specifications