H R Manufacturing 458 Soft Lathe Chuck Jaw Tongue Groove

Product Description

The H R MANUFACTURING 458 is a soft lathe chuck jaw with a tongue and groove interface, designed for use on metal lathes in machine shop environments. Machined from 1018 steel, this square-profile jaw measures 5-5/8 inches overall length and 2-1/2 inches overall width, with 3 inches between mount hole centers. Soft jaws allow machinists and toolmakers to bore or machine the gripping surface to match a specific workpiece, making them well suited for precision holding applications where standard hard jaws would risk damaging a finished part or fail to hold an irregular profile securely. The tongue and groove interface ensures repeatable, rigid seating in compatible chuck bodies.

This jaw is intended for use in production machining, toolroom, and repair shop settings. It is compatible with lathe chucks ranging from 24 inches to 36 inches maximum compatible chuck diameter. The 0.75-inch slot width and 0.50-inch groove width correspond to standard tongue and groove chuck configurations. Installation is typically performed by machinists or tool and die professionals. This jaw is sold individually and replaces or supplements existing soft jaw sets where a single jaw requires replacement due to wear or damage.

Key Features

• Soft 1018 steel construction allows field-boring to match specific workpiece profiles
• Tongue and groove interface for secure, repeatable jaw seating
• Square jaw shape for consistent clamping geometry
• 3 inches between mount hole centers for precise alignment
• Compatible with chuck diameters from 24 inches to 36 inches
• Sold as a single jaw to support replacement of individual worn or damaged jaws

Compatibility

Compatible with lathe chucks having a minimum chuck diameter of 24 inches and a maximum chuck diameter of 36 inches, using a standard tongue and groove jaw interface with a 0.75-inch slot width and 0.50-inch groove width.

Installation Notes

Installation is performed by qualified machinists familiar with lathe chuck service. Ensure the lathe spindle is fully stopped and the machine is locked out before removing or installing chuck jaws. Verify that the tongue and groove dimensions of the chuck body match this jaw before installation. After seating the jaw, bore the soft jaw face to the required diameter or profile before use to ensure accurate workpiece holding.