Hertel H59874180 Boring Insert TPCB222 HC620B Carbide

Product Description

The HERTEL H59874180 is a solid carbide boring insert designed for precision metal-cutting operations on CNC and manual boring applications. Manufactured to the TPCB222 insert style, it features a 60-degree triangular shape with an 11-degree relief angle and a 1/32-inch (0.0310-inch) corner radius. The insert carries a multi-layer CVD coating sequence of TiN, TiC, TiCN, and TiN, corresponding to manufacturer grade HC620B and material grade C7. This coating stack improves wear resistance and thermal stability during continuous or interrupted cuts. The insert is screw-held and suited for finish to semi-finish boring passes. Machinists and toolroom technicians working in production environments will recognize this as a standard TPCB-style replacement insert.

This insert is intended for boring operations on ferrous metals and cast materials consistent with a C7 carbide grade rating. The TPCB222 insert size fits standard TPCB-style boring bar pockets designed for a 1/4-inch inscribed circle and screw clamping. It is commonly used in horizontal and vertical machining centers, as well as manual boring mills, for internal diameter finishing and semi-finishing. No specific machine model or system compatibility was provided in the product data.

Key Features

• Solid carbide substrate with CVD-applied multi-layer TiN, TiC, TiCN, TiN coating for extended tool life
• TPCB222 insert style with 60-degree triangular geometry and 11-degree relief angle
• 1/4-inch inscribed circle and 3/32-inch thickness for precise pocket fit in TPCB-compatible toolholders
• 1/32-inch corner radius supports finish and semi-finish boring passes
• Screw-held clamping method for secure, repeatable seating in the insert pocket
• HC620B manufacturer grade targeting C7 material grade applications

Compatibility

Designed as a direct-fit replacement for TPCB-style boring bar pockets requiring a 1/4-inch inscribed circle insert with screw-hold clamping. No specific toolholder model numbers or system families were identified in the product data.

Installation Notes

Insert replacement should be performed by a qualified machinist or toolroom technician with the machine fully powered down and the spindle locked. Use the correct torque wrench and manufacturer-specified insert screw to seat the insert without cracking the carbide substrate. Inspect the insert pocket for chips or debris before seating a new insert. Follow your machine tool manufacturer guidelines and applicable shop safety procedures when handling carbide tooling.