Starrett 53084 Small Hole Gage 0.2 to 0.3 Inch

Product Description

The STARRETT 53084 is a small hole gage designed to measure internal diameters and hole sizes in the range of 0.2 to 0.3 inches. The half ball contact style allows the gage to seat accurately inside a bore, groove, or slot, giving the technician a precise transfer measurement to read against a micrometer or caliper. At 3.125 inches overall length, the tool is compact enough for close-quarters work on small bores. Machinists, maintenance technicians, and precision measurement professionals use this type of gage where calipers or bore gages cannot reach. Total weight is 0.06 pounds.

This gage is suited for dimensional inspection tasks in manufacturing, machining, and maintenance environments. The 0.2 to 0.3 inch range targets small bores such as pin holes, valve guides, and similar features that require accurate inside diameter verification. The half ball design provides consistent contact geometry in tight spaces, making it reliable for repetitive inspection work on production floors or in field maintenance settings.

Key Features

• Measurement range of 0.2 to 0.3 inches for small internal diameters
• Half ball contact style for accurate seating in bores, slots, and grooves
• Compact 3.125-inch overall length for access in tight spaces
• Lightweight at 0.06 pounds for extended handheld use
• Transfer measurement design — read final dimension with a micrometer or caliper

Compatibility

Designed as a standard small hole gage for use with outside micrometers or vernier calipers to obtain final measurements in typical machining and inspection applications.

Installation Notes

Small hole gages require no installation but should be handled carefully to protect the contact ball from damage. Ensure the workpiece is secure and free of burrs before inserting the gage. Read the transferred measurement with a calibrated outside micrometer immediately after withdrawal to maintain accuracy. Store the gage in a protective case when not in use to prevent wear to the contact surfaces.