Hertel H59873786 Boring Insert Cermet Triangle Left Hand

Product Description

The HERTEL H59873786 is a cermet uncoated boring insert designed for precision internal turning and boring operations on CNC and manual lathes. Manufactured to the TDHH insert style in grade HT630B, this insert features a 60-degree triangular shape with a 15-degree relief angle and a 1/64 inch (0.0150 inch) corner radius. The inscribed circle measures 5/32 inch (0.1600 inch) and the insert thickness is 3/64 inch (0.0469 inch). It is a left-hand insert secured by screw clamping. Cermet material grade C8 provides good wear resistance and surface finish performance in finishing and semi-finishing applications on steel and cast iron.

This insert is suited for light to medium boring operations where tight tolerances and fine surface finishes are required. Typical applications include finish boring of steel, stainless, and cast iron workpieces in job shop and production machining environments. The screw-on clamping method provides positive insert retention during internal boring passes. This insert is sold individually with a minimum order quantity of 10 units.

Key Features

• Cermet uncoated construction in grade HT630B for consistent wear performance in finish boring
• 60-degree triangular shape with 15-degree relief angle for clearance in internal boring applications
• Left-hand cutting orientation with screw insert holding method
• 1/64 inch corner radius (0.0150 inch) for fine surface finish results
• 5/32 inch inscribed circle (0.1600 inch) for compatibility with standard TDHH boring bar pockets
• Compact 3/64 inch thickness (0.0469 inch) suited for small-diameter boring work

Compatibility

Designed to fit standard TDHH-style boring bar insert pockets accepting a 60-degree triangular cermet insert with a 5/32 inch inscribed circle and screw clamping. Verify pocket geometry and insert style code before installation.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the boring bar is fully secured in the tool turret and the machine spindle is powered off and locked out before seating or changing the insert. Use the appropriate torque driver for the clamping screw to avoid stripping the insert pocket thread. Inspect the pocket seat and clamping screw for wear or debris before installing a new insert.