Hertel H59873943 Boring Insert Tpcb 60 Triangle Solid Carbide

Product Description

The HERTEL H59873943 is a solid carbide boring insert designed for precision internal turning and boring operations on CNC lathes and manual boring equipment. Formed in a 60-degree triangular geometry with the TPCB insert style, this uncoated carbide insert delivers consistent cutting performance in applications where coating is not required or where sharp-edge integrity is critical. The insert measures 0.25 inches inscribed circle diameter and carries a corner radius of 0.002 inches, making it suited for fine-finish boring passes with tight dimensional tolerances. Material grade C25 solid carbide provides the hardness and wear resistance needed for ferrous and non-ferrous machining. A licensed machinist or CNC setup technician installs this insert using the screw-holding method standard to TPCB-style toolholders.

This insert is intended for boring and internal turning operations in production and job-shop environments. The TPCB220.1 geometry fits toolholders designed for triangular screw-on inserts and is appropriate for light to moderate material removal on steel, cast iron, and non-ferrous alloys where an uncoated edge is preferred. The HT310B manufacturer grade designates the specific carbide substrate formulation. Applications range from single-point boring bar work on manual lathes to high-speed CNC internal diameter finishing where dimensional accuracy is paramount. The minimum order quantity for this insert is 10 pieces.

Key Features

• TPCB insert style with screw holding method for secure, repeatable seating in compatible toolholders
• 60-degree triangular shape provides three usable cutting edges per insert
• 0.002 inch corner radius supports fine-finish and close-tolerance boring passes
• Solid carbide construction in grade C25 for hardness and edge stability
• Uncoated finish preserves sharp cutting geometry for applications requiring minimal built-up edge
• 11-degree relief angle reduces flank contact and heat generation during the cut

Compatibility

Designed for use in TPCB-style screw-clamp boring bar toolholders and insert holders accepting a 220.1 insert size code with a 0.25 inch inscribed circle and 3/32 inch thickness.

Installation Notes

This insert is installed by a machinist or toolroom technician using the screw-clamp method; ensure the toolholder clamp screw is fully seated and torqued per the toolholder manufacturer specifications before operation. Inspect the insert pocket for chips or debris before seating the insert to prevent rocking or premature edge failure. Replace the insert at the first sign of chipping, built-up edge, or dimensional drift — do not continue cutting on a worn edge. Follow all machine guarding and lockout procedures before accessing the toolholder on any live spindle equipment.