Starrett 53076 Small Hole Gage Half Ball

Product Description

The STARRETT 53076 is a small hole gage with a half ball style measuring head, designed for taking precise inside diameter measurements in tight or shallow bores where a full ball head cannot seat properly. Machinists, tool and die makers, and quality control technicians use this gage to transfer bore measurements to an outside micrometer for final reading. The half ball configuration allows the instrument to contact the bore wall cleanly, providing an accurate transfer of the internal dimension. At 0.5 pounds, the 53076 is a compact, hand-held precision tool suited for bench and floor use in machine shops and manufacturing environments.

This gage is appropriate for measuring small holes, slots, grooves, and recesses in precision machined components. It is commonly used in job shop and production environments where quick, repeatable bore measurement is required without the use of a dedicated bore gauge. The half ball style head is particularly useful in blind holes and locations with limited depth clearance.

Key Features

• Half ball style head for accurate contact in shallow or restricted bore entries
• Transfer-type measurement design used in conjunction with an outside micrometer
• Lightweight at 0.5 pounds for comfortable single-hand use
• Compact construction suited for bench work and on-machine inspection
• Individual unit packaging with a minimum order quantity of one

Compatibility

Designed as an OEM-style precision measuring tool for use in machine shop, toolroom, and quality inspection applications requiring small internal bore measurement.

Installation Notes

Small hole gages are hand-held measuring instruments and require no installation. A licensed machinist or quality technician should follow standard metrology practice when using this gage, including zeroing the associated outside micrometer before taking a transfer measurement. The gage should be cleaned and stored properly after each use to protect the contact surfaces and maintain measurement accuracy.