Hertel H59872960 Boring Insert CDHB1.20.61 HT540B Carbide

Product Description

The HERTEL H59872960 is a solid carbide boring insert designed for precision internal boring operations on CNC lathes and machining centers. Configured in the CDHB style with an 80-degree diamond shape, this uncoated insert is produced to manufacturer grade HT540B and material grade C1. Key dimensional specs include a 5/32-inch (0.1560-inch) inscribed circle, a 1/64-inch (0.0150-inch) corner radius, and a 0.04-inch thickness. The 15-degree relief angle supports clean chip clearance during close-tolerance boring passes. Machinists and toolroom professionals working with light to medium stock removal will find this insert suited to demanding finishing operations where edge geometry consistency is critical.

This insert is intended for boring applications in machine shop and production environments, both job-shop and high-volume. The CDHB insert style and screw-holding method make it compatible with toolholders designed for that configuration. The uncoated solid carbide construction is well-suited for applications where coating interference would affect dimensional accuracy or where re-grinding is part of the shop workflow. Typical use cases include finish boring of bores requiring tight tolerances and smooth surface finishes in ferrous and non-ferrous workpiece materials.

Key Features

• Solid carbide construction, material grade C1, manufacturer grade HT540B
• 80-degree diamond insert shape (CDHB style) for versatile boring geometry
• 1/64-inch (0.0150-inch) corner radius for controlled surface finish
• 5/32-inch inscribed circle (0.1560 inch decimal) for standard toolholder compatibility
• 15-degree relief angle supports chip clearance in tight bore conditions
• Uncoated finish - suitable for applications where bare carbide edge is preferred
• Screw-holding insert mount for positive, repeatable seating in compatible toolholders

Compatibility

Designed for use in CDHB-style boring toolholders that accept a 5/32-inch inscribed circle, 0.04-inch thick, screw-clamp diamond inserts with a 15-degree relief angle.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the toolholder is secured in the turret or boring bar before seating or replacing the insert. Use the appropriate torx or hex key to tighten the clamping screw to toolholder manufacturer specifications - do not overtighten, as carbide inserts are brittle and can crack under excess clamp force. Inspect the insert pocket and seating surface for chips or debris before installing a new insert.