Hertel H59875179 Boring Insert TD6P2 HP520B Solid Carbide

Product Description

The HERTEL H59875179 is a solid carbide boring insert in the TD6P2 style, designed for precision internal boring operations on CNC and manual turning equipment. The insert features a 60-degree triangular geometry with an 11-degree relief angle and a 1/32-inch corner radius, making it suitable for controlled, repeatable cuts in ferrous and non-ferrous materials. The HP520B grade carbide substrate carries a TiN coating applied via PVD process, which extends cutting edge life and reduces built-up edge at moderate cutting speeds. This insert is held in the toolholder by a screw-clamp method and is selected by machinists, tool-and-die technicians, and CNC operators for boring applications requiring tight tolerances.

This insert is appropriate for use in screw-lock boring bars and toolholders designed to accept the TD6P insert style. With a 3/8-inch inscribed circle and 1/8-inch thickness, it fits compact boring heads used in both production and repair-shop environments. The C5 material grade designation makes it well suited for general-purpose machining of cast iron, steel, and similar workpiece materials at medium cutting parameters. Applications include internal diameter finishing and light roughing passes on lathes and machining centers.

Key Features

• Solid carbide construction with PVD TiN coating for extended edge life
• 60-degree triangular insert shape with 11-degree relief angle for positive cutting action
• 1/32-inch corner radius (0.0310 inches decimal) for controlled surface finish
• 3/8-inch inscribed circle (0.3750 inches) fits standard compact boring bar pockets
• Screw-clamp insert holding method for secure, repeatable seating
• HP520B manufacturer grade, C5 material grade for general-purpose ferrous and non-ferrous machining

Compatibility

Designed for use in screw-lock toolholders and boring bars that accept the TD6P2 insert style with a 3/8-inch inscribed circle and 0.1300-inch hole diameter.

Installation Notes

Insert installation and replacement should be performed with the machine fully powered down and the spindle locked. Use the correct torque wrench and manufacturer-specified insert screw to secure the insert in the pocket - overtightening the clamp screw can fracture carbide inserts. Inspect the insert pocket seat for chips or debris before seating a new insert. Worn or damaged inserts should be indexed or replaced before resuming cuts to avoid workpiece damage or toolholder failure.