Hertel 1000689 TPG431 HC335 Carbide Turning Insert

Product Description

The HERTEL 1000689 is a solid carbide turning insert designed for precision metal-cutting operations on CNC and manual lathes. It carries the TPG431 style designation and the HC335 manufacturer grade, featuring a multilayer CVD coating of TiC, TiCN, and TiN for improved wear resistance and tool life across a range of workpiece materials. The insert measures 22 millimeters in length (0.866 inches) with a 1/2-inch inscribed circle and a 1/64-inch (0.0156-inch) corner radius. The neutral hand orientation makes it suitable for both left- and right-hand toolholders. It is held in place by a clamp-style holding method and is part of the KENDEX series.

This insert is intended for turning applications on steel and stainless steel workpiece materials, corresponding to ISO material groups P and M. It supports a maximum depth of cut of 1.25 millimeters (0.049 inches) and delivers a positive rake geometry with an 11-degree relief angle. Typical users include CNC machinists and production turning operators working in job shop and manufacturing environments. The insert is suited for finishing and light roughing passes where controlled chip formation and surface finish are priorities.

Key Features

• HC335 grade solid carbide with CVD-applied TiC, TiCN, and TiN multilayer coating for extended wear life
• TPG431 style with 60-degree triangular insert shape and positive rake geometry
• 11-degree relief angle (Clearance Code P) with Tolerance Code G for consistent dimensional accuracy
• 1/64-inch (0.0156-inch) corner radius for finishing and light roughing applications
• Neutral hand orientation compatible with standard clamp-style toolholders
• Maximum depth of cut of 1.25 mm (0.049 inches) suitable for controlled material removal

Compatibility

Designed for use in clamp-style TPG-style toolholders within the KENDEX series. Compatible with workpiece materials in ISO groups P (steel) and M (stainless steel), and corresponds to material grades C5 and C6.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Power down and lock out the machine spindle before seating or changing the insert. Secure the insert firmly using the clamp-style holding mechanism specified for TPG-style toolholders and verify proper seating before resuming operation. Do not exceed the rated maximum depth of cut for the insert grade and coating.