Spirotherm 20-661-5 Internal Chamfer Gage 1-2 in

Product Description

The SPIROTHERM 20-661-5 is an internal chamfer gage designed to measure chamfered or countersunk holes with an included angle range of 0 to 90 degrees. The 3-blade plunger contacts the chamfer surface evenly to deliver a reading of the taper hole diameter across a measurement range of 1 to 2 inches. Accuracy is rated at 0.001 inches, with graduation also at 0.001 inches. The body and working components are constructed from hardened tool steel for durability under shop conditions. A white dial face provides clear contrast for quick reading. Machinists, quality control technicians, and precision maintenance professionals use this tool during inspection and fitting operations.

This gage is suited for inspecting internal chamfers and countersunk features in metal, plastic, and composite workpieces. It applies to production environments, job shops, and maintenance facilities where chamfer geometry must be verified before assembly or finishing. The 1 to 2 inch measurement range covers a wide variety of standard chamfered hole sizes encountered in mechanical and structural applications. The tool ships furnished in a fitted case for organized storage and transport between work areas or job sites.

Key Features

• Measurement range of 1 to 2 inches for internal chamfer and tapered hole diameter
• Included angle range of 0 to 90 degrees
• 3-blade plunger design for even contact and consistent readings
• Accuracy and graduation of 0.001 inches
• Hardened tool steel construction for wear resistance
• White dial face for high-contrast readability
• Furnished in a fitted case for storage and transport

Compatibility

Designed as an OEM-style precision measurement tool for inspecting internal chamfers and countersunk holes in standard machined and fabricated components within the 1 to 2 inch diameter range.

Installation Notes

This is a hand-held measurement instrument requiring no installation. Before use, ensure the workpiece is clean and free of burrs or debris that could affect contact. Store in the furnished fitted case when not in use to protect the dial mechanism and blades from damage. No power source or special tooling is required for operation.