Small Hole Gauge Sets

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Small hole gauge sets are precision tools designed for measuring the internal diameter of small bores and grooves, with a capacity of up to 0.5 inches. Featuring a two-point contact mechanism, these gauges utilize hardened half-ball contacts that expand upon adjustment. The operator adjusts the contact points by turning a knurled knob or nut at the gauge's head. Once the contacts touch the bore's sides, the gauge is removed, and its setting is measured with an outside micrometer to determine the hole's diameter indirectly.

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Our precision small hole gauge sets are designed for accurately measuring the internal diameters of small bores and grooves. Each set includes multiple gauges that expand to fit the opening, ensuring precise contact with the bore's sides. The gauge's position is then measured with an outside micrometer, providing an indirect yet accurate determination of the hole's diameter.

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