Hertel H59874222 Boring Insert TPCB222 Solid Carbide

Product Description

The HERTEL H59874222 is a solid carbide boring insert designed for precision metal-cutting operations on lathes and boring bars. Manufactured to TPCB222 geometry, this insert features a 60-degree triangular shape with an 11-degree relief angle, a 1/4-inch inscribed circle, and a 3/32-inch thickness. The 1/32-inch corner radius makes it suitable for finishing and semi-finishing passes where edge geometry consistency is critical. Uncoated solid carbide construction in material grade C1 delivers stable cutting performance in ferrous materials. Installation is handled by licensed machinists and toolroom technicians using screw-type insert clamping systems.

This boring insert is used in turning and boring applications across general machining environments including job shops, production facilities, and toolrooms. The TPCB-style seat geometry fits screw-clamp boring bar holders and cartridge-style boring heads designed for triangular inserts. Typical applications include internal diameter finishing, through-bore operations, and stepped bore profiling on metals within the C1 grade cutting range. The compact 1/4-inch inscribed circle suits smaller bore diameters where clearance is limited.

Key Features

• Solid carbide construction in material grade C1 for consistent edge integrity
• Uncoated finish suitable for applications where coating adhesion or contamination is a concern
• 60-degree triangle shape (TPCB222) with 11-degree relief angle for positive cutting clearance
• 1/32-inch corner radius for controlled surface finish on finishing and semi-finishing cuts
• Screw-type insert holding method for secure, repeatable seating in compatible toolholders
• Compact geometry with 1/4-inch inscribed circle for smaller bore diameter applications

Compatibility

Designed as an OEM-style replacement or direct-fit insert for screw-clamp boring bars and cartridge boring heads accepting TPCB-style triangular inserts with a 1/4-inch inscribed circle seat.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and the machine is locked out before changing inserts. Seat the insert firmly against the pocket walls and tighten the clamping screw to the toolholder manufacturer's specified torque. Inspect the insert seat and clamping screw threads for wear or debris before installation to ensure proper seating and edge repeatability.