H R Manufacturing HR-82-2.5-A Soft Lathe Chuck Jaw

Product Description

The H R MANUFACTURING HR-82-2.5-A is a soft lathe chuck jaw machined from 6061 aluminum for use in metalworking and machining operations. Soft jaws are designed to be bored or machined to a custom grip profile on-site, allowing machinists to hold irregular, delicate, or finished workpieces without marring the surface. This jaw features a serrated interface that mates securely with a matching serrated chuck body, providing repeatable positioning. The overall length is 4 inches and the overall width is 1.75 inches, with a distance of 1.181 inches between mount hole centers. This part is installed by machinists and toolroom technicians on manual or CNC lathes.

This jaw is compatible with 11-inch chuck bodies and is sold as a single jaw. Sets of three are typically required for a standard 3-jaw chuck configuration. The serrated jaw interface ensures accurate re-indexing when jaws are removed and reinstalled. Typical applications include precision turning operations in job shops, production machining environments, and toolroom setups where workholding flexibility is needed for non-standard or finished part geometries.

Key Features

• Soft jaw construction allows on-site boring to custom grip profiles for delicate or finished workpieces
• Serrated jaw interface provides secure, repeatable seating on compatible chuck bodies
• 6061 aluminum material is easy to machine and reduces chuck weight compared to steel jaws
• Compatible with 11-inch chuck diameter
• Mount hole center spacing of 1.181 inches with a groove width of 0.630 inches
• Square jaw shape for standard 3-jaw chuck configurations

Compatibility

Designed for use with 11-inch diameter lathe chucks requiring a serrated jaw interface with a 1.181-inch mount hole center distance and a 0.630-inch groove width. Three jaws are required for a complete 3-jaw chuck setup.

Installation Notes

Installation and boring of soft jaws should be performed by a qualified machinist. Before installing or removing chuck jaws, power down the lathe and ensure the spindle has come to a complete stop. Soft jaws must be bored in place on the chuck under light clamping pressure to ensure concentricity. Use appropriate fasteners matched to the 12 mm fastener size specified for this jaw to avoid thread damage or jaw movement during operation.