Hertel H00208272 Boring Insert TPGT32.51HF2 HP520B Tin

Product Description

The HERTEL H00208272 is a solid carbide boring insert designed for precision internal turning and boring operations on CNC and manual lathes. This TPGT-style triangular insert carries the HP520B grade designation and features a physical vapor deposition (PVD) TiN coating over a C5 carbide substrate, providing wear resistance and edge toughness in finishing applications. Key cutting geometry includes a 1/64 inch (0.0150 inch) corner radius, a 3/8 inch inscribed circle (IC), a thickness of 1/8 inch, and an 11-degree relief angle. The HF2 chipbreaker geometry is optimized for light, high-finish cuts. Installation is performed by machinists and toolroom technicians using screw-clamping toolholders designed for TPGT inserts.

This insert is suited for light finishing and semi-finishing operations in boring bars and internal turning toolholders. The 60-degree triangular shape and HF2 chipbreaker make it well-matched to applications requiring tight tolerances and fine surface finishes on steel and other machinable materials. The screw-clamping holding method provides positive, repeatable seating. This insert is sold individually and subject to a minimum order quantity of 10 pieces per order.

Key Features

• Solid carbide C5 grade substrate with PVD TiN coating for wear resistance in finishing cuts
• TPGT insert style with 60-degree triangular shape and 11-degree relief angle
• HF2 chipbreaker geometry optimized for light finishing and semi-finishing passes
• 1/64 inch corner radius (0.0150 inch) for fine surface finish capability
• 3/8 inch inscribed circle and 1/8 inch thickness — standard TPGT32.51 sizing
• Screw-clamping holding method for secure, repeatable insert positioning

Compatibility

Designed for use in screw-clamp boring bars and internal turning toolholders accepting TPGT32.51 triangular inserts with a 3/8 inch inscribed circle.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the tool is secured before changing inserts. Seat the insert firmly against the toolholder pocket locating surfaces before tightening the clamping screw to the toolholder manufacturer's specified torque. Inspect the insert pocket for chips or debris that could prevent proper seating and affect cutting geometry.