Hertel H59873349 Boring Insert Triangle Solid Carbide

Product Description

The HERTEL H59873349 is a solid carbide boring insert designed for precision internal boring operations on CNC and manual lathes. It carries the TDHB insert style designation and is manufactured to size code 1.280.75.0.1 in grade HT540B, an uncoated carbide grade suited for a range of ferrous and non-ferrous materials. The insert features a 60-degree triangle (triangular) shape with a 15-degree relief angle and a 0.002 inch corner radius, making it appropriate for finish and semi-finish boring passes where dimensional accuracy is critical. Screw-on insert holding provides secure, repeatable positioning in compatible boring toolholders.

This insert is used in precision boring applications across metalworking shops, tool rooms, and production machining environments. It fits boring bars and toolholders designed to accept TDHB-style triangle inserts. Typical applications include internal diameter finishing on steel, cast iron, and similar workpiece materials where tight tolerances and consistent surface finish are required. The uncoated HT540B grade is commonly selected for lower cutting speeds and materials where a coated grade is not preferred.

Key Features

• Solid carbide construction in material grade C1 for wear resistance and edge stability
• Uncoated HT540B grade suited for finish boring at controlled cutting parameters
• 60-degree triangle (TDHB) insert shape with 15-degree relief angle for clearance in bore entry
• 0.002 inch corner radius for tight-tolerance finish boring
• Screw-on insert holding method for secure, repeatable seating in toolholder
• Compact geometry: 5/32 inch (0.1563 inch) inscribed circle, 3/64 inch (0.0469 inch) thickness

Compatibility

Designed as a direct-fit replacement for TDHB-style boring insert seats accepting a 5/32 inch inscribed circle triangle insert with screw-on holding. Confirm toolholder insert pocket specifications match insert size code 1.280.75.0.1 before installation.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Power down and lock out the machine before indexing or replacing inserts. Use the correct torque driver for the clamping screw to ensure proper seating without over-torquing the insert pocket. Inspect the insert pocket and seating surfaces for chips or debris before installing a new insert.