H R Manufacturing HR-40-16-5 Soft Lathe Chuck Jaw

Product Description

The H R MANUFACTURING HR-40-16-5 is a serrated soft lathe chuck jaw machined from 1018 steel for use in 3-jaw lathe chuck setups. Soft jaws are designed to be bored or machined on-site to match a specific workpiece, giving machinists a precise, repeatable grip without marring finished surfaces. The serrated interface locks the jaw securely to the chuck body, preventing slippage under load. At 5 inches overall height and 6.25 inches overall length, this jaw provides substantial material for custom boring operations. Suitable for chuck diameters ranging from 16 to 20 inches, it fits a range of heavy-duty lathe configurations used in production and job-shop environments.

This jaw is intended for metalworking lathes equipped with 3-jaw chucks in the 16 to 20 inch diameter range. It is a common replacement or upgrade component in machine shops performing repetitive turning operations where a custom-bored soft jaw reduces setup time and improves part-to-part consistency. Sold individually, allowing machinists to replace a single worn or damaged jaw or to maintain a set of application-specific jaws for dedicated fixtures.

Key Features

• Serrated jaw interface for positive, slip-resistant seating on the chuck body
• 1018 steel construction balances machinability with adequate toughness for soft-jaw boring
• Compatible with 3-jaw chucks from 16 to 20 inches in diameter
• 1.562 inches between mount hole centers for precise alignment during installation
• 1 inch groove width matches standard serrated chuck body profiles
• 5 inches overall height provides ample material for deep boring operations

Compatibility

Compatible with 3-jaw lathe chucks ranging from 16 to 20 inches in diameter that use a serrated jaw interface with a 1.562 inch mount hole center spacing and a 1 inch groove width.

Installation Notes

Installation should be performed by a qualified machinist or lathe operator. Ensure the lathe is fully powered down and the chuck is stationary before removing or installing any jaw. Verify that the serration engagement is full and even across the jaw interface before tightening mounting hardware. After installation, bore the soft jaw in place on the machine to ensure concentricity with the spindle centerline before committing to a production run.