Hertel H59873935 Boring Insert TPCB220.1 HC620B Carbide

Product Description

The HERTEL H59873935 is a solid carbide boring insert designed for precision internal turning and boring operations on CNC and manual lathes. Manufactured to TPCB insert style with a 60-degree triangular geometry and an 11-degree relief angle, this insert suits general-purpose boring in ferrous and non-ferrous materials. The CVD-applied multilayer coating sequence of TiN, TiC, TiCN, and TiN enhances wear resistance and extends tool life in continuous and light-interrupted cuts. With a 0.250-inch inscribed circle, a thickness of 0.096 inches, and a 0.002-inch corner radius, this insert delivers tight tolerances in finish and semi-finish boring passes. It is held in place by a screw-clamp method, ensuring secure positioning under cutting loads.

This insert is suited for production and job-shop environments where consistent bore quality is required. The TPCB style and HC620B grade make it appropriate for machining steel, cast iron, and similar materials at moderate to high cutting speeds. Screw-on mounting is compatible with standard TPCB-style boring bars and insert holders used in turning centers and dedicated boring machines. It is sold individually, with a minimum order quantity of 10 pieces per order.

Key Features

• Solid carbide substrate with C7 material grade for hardness and thermal stability
• CVD multilayer coating: TiN, TiC, TiCN, TiN for extended wear resistance
• 60-degree triangular insert geometry with 11-degree relief angle
• 0.002-inch corner radius for finish and semi-finish boring applications
• Screw-clamp insert holding method for secure, repeatable seating
• 1/4-inch inscribed circle for compatibility with standard TPCB boring bars

Compatibility

Designed for use with standard TPCB-style boring bars and insert holders that accept a 1/4-inch inscribed circle triangular insert with screw-clamp retention.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before seating or replacing inserts. Use the correct torque driver for the clamping screw to avoid insert rocking or breakage — consult the boring bar manufacturer's specification for the recommended screw torque. Inspect the insert pocket and clamping screw for wear or debris before seating a new insert.