Starrett 53083 Small Hole Gage 0.125 to 0.2 Inch

Product Description

The STARRETT 53083 is a small hole gage designed for measuring the internal diameter of holes, bores, slots, and grooves that are too small for standard inside micrometers or calipers. The gage features a half ball contact style and covers a measurement range of 0.125 to 0.2 inches, with an overall length of 2-13/16 inches. Machinists, tool and die makers, and precision mechanics use this type of gage to transfer a measurement to an outside micrometer for a final reading. It is a standard instrument in machine shops, maintenance departments, and precision fabrication environments.

The STARRETT 53083 is suited for measuring small bores in engine components, hydraulic fittings, valve bodies, and precision machined housings where access is restricted and accuracy is critical. The half ball design makes contact with the bore wall at a single tangent point, which reduces measurement error in shallow or closely spaced holes. This gage is appropriate for both production inspection and field service applications where a portable, reliable measurement tool is needed for small-diameter work.

Key Features

• Measurement range of 0.125 to 0.2 inches for small bore applications
• Half ball contact style for accurate single-point bore contact
• Overall length of 2-13/16 inches for reach into confined bores
• Compact and lightweight at 0.008 pounds for easy one-hand use
• Used in tandem with an outside micrometer to obtain final diameter readings

Compatibility

Designed as a standard small hole gage for use with any outside micrometer calibrated to read in the 0.125 to 0.2 inch range.

Installation Notes

Small hole gages are used by machinists and precision mechanics and require no installation. Expand the gage slightly within the bore, lock the setting, withdraw carefully, and transfer the measurement to a calibrated outside micrometer. Keep the contact ball clean and free of debris before use to ensure accurate readings. Handle with care to avoid dropping, which can damage the precision ball contact.