Schunk 159100 Hard Lathe Chuck Jaw Master Serrated

Product Description

The SCHUNK 159100 is a master hard lathe chuck jaw designed for use with lathe chucks up to 200 millimeters in diameter. Manufactured from case hardened steel, this jaw delivers the surface durability required for high-cycle turning and machining operations. The serrated jaw interface provides positive, repeatable seating against the chuck body, maintaining consistent grip force during cuts. Sold as a set of three jaws, the 159100 is a direct replacement component for worn or damaged master jaws on compatible lathe chuck assemblies. Machinists and tool room technicians who perform in-house chuck maintenance will find this a straightforward, spec-matched replacement.

This master jaw is suited for manual and CNC lathe applications in job shops, production turning cells, and maintenance departments. It is intended for installation into chuck bodies with a 20 mm slot width and a serrated interface. The jaw interfaces directly with the chuck body master groove, serving as the foundation for top jaws or soft jaws that are machined to workpiece geometry. No step profile is present on this jaw, consistent with a clean master-jaw configuration intended to accept field-machined top jaws.

Key Features

• Case hardened steel construction resists wear under repeated clamping cycles
• Serrated jaw interface type ensures positive, repeatable chuck body engagement
• Compatible with lathe chucks up to 200 mm in diameter
• 20 mm slot width matches standard chuck body groove dimensions
• Set of 3 jaws provides a complete master jaw replacement in one order
• Zero-step master jaw profile accepts field-machined top jaws

Compatibility

Designed as an OEM-style replacement master jaw for serrated-interface lathe chucks with a maximum chuck diameter of 200 mm and a 20 mm slot width. Specific chuck model compatibility should be verified against the chuck manufacturer documentation before ordering.

Installation Notes

Installation should be performed by a qualified machinist or tool room technician familiar with lathe chuck service procedures. Power down the lathe and engage the spindle lock before removing or installing chuck jaws. Verify that the serrated interface and slot width of the chuck body match the jaw specifications prior to assembly. Follow the chuck manufacturer torque and seating procedures to ensure proper jaw retention and safe workholding.