Starrett 63685 Internal Chamfer Gage 0 to 1/2 in 3-blade

Product Description

The STARRETT 63685 is an internal chamfer gage designed to measure chamfer angles on bored, drilled, or countersunk holes. The tool uses a 3-blade plunger mechanism that contacts the chamfered surface and delivers a direct reading without requiring a setting master. It covers a measurement range of 0 to 1/2 inches and an included angle range of 0 to 90 degrees. The body and blades are constructed from hardened tool steel with all ground surfaces for dimensional accuracy and long service life. Machinists, tool-and-die technicians, and quality control inspectors use this gage on the shop floor and in inspection departments.

The 63685 is suited for internal chamfer measurement on production parts across metalworking, machining, and precision fabrication environments. Typical applications include verifying countersink geometry on drilled holes, checking chamfer depth and angle on machined bores, and confirming compliance with print callouts on turned or milled components. The white dial face provides clear readability under standard shop lighting. The included deluxe padded case protects the instrument during storage and transport between work areas.

Key Features

• 3-blade plunger design provides stable, repeatable contact on internal chamfer surfaces
• No setting master required — ready to use directly from the case
• All ground surfaces on hardened tool steel construction for precision and durability
• Measures included angles from 0 to 90 degrees and chamfer sizes from 0 to 1/2 inches
• White dial face for high-contrast, easy-to-read measurements
• Includes deluxe padded case for instrument protection and organized storage

Compatibility

Designed as a direct-use internal chamfer gage for metalworking and machining applications requiring measurement of chamfered or countersunk holes up to 1/2 inches with included angles up to 90 degrees.

Installation Notes

The 63685 is a hand-held precision measuring instrument and does not require mounting or installation. Before use, inspect the blades for wear or damage and verify the dial reads zero with the plunger fully retracted. No power source is required for the standard dial version; electronic indicator versions are available on request. Store the gage in its padded case when not in use to protect the ground surfaces and dial mechanism.