H R Manufacturing HR-495-P Soft Lathe Chuck Jaw 15 Inch

Product Description

The H R MANUFACTURING HR-495-P is a soft lathe chuck jaw with a tongue and groove interface, designed for use in manual lathe setups where custom gripping profiles are required. Soft jaws are machined in-place by the operator to match a specific workpiece, providing precise, repeatable clamping. This jaw is manufactured from 1018 steel, measuring 7.25 inches overall length and 2 inches overall width. It weighs approximately 14.05 pounds and is built to seat securely in the chuck body via the tongue and groove slot system. Machinists and toolroom operators rely on soft jaws when standard hardened jaws cannot hold irregular or pre-machined workpieces without damage.

This jaw is intended for use on 15-inch diameter lathe chucks in machine shop and toolroom environments, both production and job-shop settings. The square jaw shape suits flat-bottom and straight-bore clamping applications. The 3-inch distance between mount hole centers and a 0.75-inch slot width provide a stable, repeatable mounting footprint. Metalworking professionals install these jaws as matched sets, boring them to the required workpiece diameter before use.

Key Features

• Tongue and groove interface for secure, positive seating in compatible chuck bodies
• 1018 steel construction for machinability and consistent bore performance
• Square jaw shape compatible with flat and straight-bore workpiece profiles
• 3-inch mount hole center spacing for stable, repeatable chuck mounting
• 0.75-inch slot width and 0.5-inch groove width for proper tongue and groove fit
• 7.25-inch overall length provides generous material for custom boring operations

Compatibility

Designed for use with 15-inch diameter lathe chucks accepting a tongue and groove jaw interface. Verify slot width, groove width, and mount hole spacing against the chuck manufacturer specifications before installation.

Installation Notes

Soft chuck jaws are installed and bored by a qualified machinist or toolroom technician. The lathe must be powered down and the chuck secured before jaw removal or installation. Mount hole fasteners should be tightened evenly and in sequence to ensure uniform seating across the tongue and groove interface. Always bore soft jaws while mounted in the chuck at the working clamping diameter before placing a workpiece.