Hertel H59872929 Boring Insert Diamond Tin Solid Carbide

Product Description

The HERTEL H59872929 is a solid carbide boring insert designed for precision internal boring operations in metalworking and machining applications. This diamond-shaped insert features an 80-degree included angle, a 5/32-inch inscribed circle (0.1563 inches), and a 1/64-inch corner radius (0.0150 inches). The insert carries a TiN coating applied via PVD process, which improves surface hardness and wear resistance. At 0.04 inches thick with a 15-degree relief angle, it is suited for finishing and semi-finishing cuts in ferrous materials. Machinists and CNC operators working on boring bars and precision turning setups are the primary installers.

This insert is used in boring bar toolholders that accept CDHB-style inserts with screw-type holding methods. It is appropriate for machining operations on CNC lathes, boring mills, and manual machines requiring tight tolerances. The HP520B grade designation and C5 carbide classification indicate suitability for cutting steel and cast iron at moderate to higher cutting speeds. The TiN coating extends tool life in continuous cut applications. Insert size code 1.20.61 should be matched against the toolholder specification to confirm proper seating and clearance.

Key Features

• Solid carbide construction, material grade C5, for rigidity and edge retention
• TiN coating via PVD process for improved wear resistance and extended tool life
• 80-degree diamond shape with 1/64-inch corner radius for precision boring profiles
• 15-degree relief angle reduces rubbing on the bore wall during light finishing cuts
• Screw-type insert holding method for positive seating in compatible toolholders
• Insert size code 1.20.61 for matching to CDHB-style boring bar holders

Compatibility

Designed as an OEM-style replacement insert for CDHB-style boring bar toolholders that accept screw-held diamond inserts with a 5/32-inch inscribed circle.

Installation Notes

Installation is performed by machinists or CNC tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the appropriate torx or hex key to seat the screw clamp to manufacturer specification for the toolholder being used. Inspect the insert pocket for chips or debris before seating the insert to ensure full contact and prevent premature edge failure.