Hertel H59874750 Boring Insert TPCH221 Solid Carbide

Product Description

The HERTEL H59874750 is a solid carbide boring insert designed for precision internal turning and boring operations on CNC and manual machining equipment. Manufactured to the TPCH221 insert style in grade HT410B, this uncoated triangular insert provides reliable cutting performance on a range of workpiece materials suited to a C2 carbide grade. Key dimensional specs include a 1/4-inch inscribed circle, a 3/32-inch thickness, and a 1/64-inch corner radius, making it well suited for finishing and semi-finishing passes where tight tolerances are required. The insert is held in the toolholder via screw clamping and features an 11-degree relief angle for clean chip clearance.

This insert is intended for use in boring bars and insert toolholders that accept the TPCH style triangular insert with a 221 size code. It is suited for machining cast iron, non-ferrous metals, and similar materials within the C2 grade application range. Typical installation environments include job shops, production machining cells, and maintenance facilities where internal diameter work demands consistent dimensional accuracy. Each package contains one insert, with a minimum order quantity of 10 pieces.

Key Features

• Solid carbide construction in manufacturer grade HT410B for consistent hardness and wear resistance
• Uncoated finish suitable for C2-grade carbide applications including cast iron and non-ferrous materials
• 60-degree triangular shape (TPCH221 style) with three usable cutting edges per insert
• 1/64-inch corner radius for finishing and semi-finishing boring operations
• Screw-mount insert holding method for secure, repeatable seating in compatible toolholders
• 11-degree relief angle promotes clean chip evacuation and reduces rubbing on the bore wall

Compatibility

Designed as an OEM-style replacement or direct-use insert for boring bars and toolholders accepting TPCH-style triangular inserts with a 221 size code and screw-clamp retention.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before seating or replacing inserts. Use the appropriate torx or hex key to secure the clamp screw to the toolholder manufacturer's recommended seating procedure without over-torquing. Inspect the insert pocket and clamp for debris or damage before installing a new insert to ensure proper seating and cutting-edge alignment.