Hertel H59874701 Boring Insert TPCH220.5 Carbide Uncoated

Product Description

The HERTEL H59874701 is a solid carbide boring insert designed for precision internal turning and boring operations on CNC and manual lathes. Manufactured to TPCH insert style specifications with a triangular 60-degree included angle, this uncoated grade HT540B insert delivers consistent performance in finishing and semi-finishing applications. Key dimensional specs include a 1/4-inch inscribed circle, 3/32-inch thickness, and a 0.007-inch corner radius, which supports tight tolerances on bore diameters. Screw-clamped holding method ensures positive retention in compatible TPCH toolholders. This insert is installed by machinists and tool-room professionals working in metalcutting environments.

The H59874701 is suited for boring operations in general machining applications where an uncoated solid carbide insert is preferred, such as when cutting non-ferrous metals, plastics, or other materials where coatings may be detrimental to surface finish or tool life. The C1 material grade and uncoated finish make it a practical choice for shops running fine-bore work that demands sharp cutting edges and dimensional repeatability. Sold individually per package with a minimum order quantity of 10 units.

Key Features

• Solid carbide construction, material grade C1, uncoated finish for sharp edge retention
• TPCH insert style with screw-clamp holding method for positive seating in toolholder
• 60-degree triangular shape provides three usable cutting edges per insert
• 0.007-inch corner radius suitable for finishing and semi-finishing bore work
• 1/4-inch inscribed circle and 3/32-inch thickness conform to standard TPCH220.5 geometry
• 11-degree relief angle reduces flank contact and supports clean cutting action

Compatibility

Designed as an OEM-style replacement or direct-fit insert for toolholders accepting TPCH-style triangular boring inserts with a 1/4-inch inscribed circle and screw-clamp retention.

Installation Notes

Insert replacement and indexing should be performed by a qualified machinist with the machine powered down and all rotating components at a full stop. Use the appropriate torque driver for the clamping screw to avoid over-tightening, which can crack the carbide. Inspect the toolholder pocket and clamping screw for wear or debris before seating a new insert. Verify insert orientation and edge selection before resuming cutting operations.