Hertel H59873695 Boring Insert Tdhh Solid Carbide HT540B

Product Description

The HERTEL H59873695 is a solid carbide boring insert designed for precision internal turning and boring operations on CNC and manual lathes. It features a triangular 60-degree included angle geometry in the TDHH insert style, with a 5/32-inch inscribed circle and a corner radius of 0.007 inches. The insert is uncoated, manufactured to material grade C1, and carries the HT540B grade designation. At 0.0469 inches thick, it is engineered for light to medium boring passes where tight tolerances and surface finish consistency are critical. It is held in the toolholder by a screw-clamp method and is configured for left-hand cutting orientation. Licensed machinists and CNC toolroom technicians are the primary installers.

This insert is suited for boring applications requiring a 15-degree relief angle and a triangular insert geometry. It is commonly used in production machining environments where solid carbide tooling is preferred over coated or cermet alternatives for specific workpiece materials. The TDHH insert style and left-hand designation make it applicable to dedicated boring bars and insert holders configured for that geometry. The manufacturers catalog number for this insert is TDHH12807505L. This item is sold individually but is subject to a minimum order quantity of 10 pieces.

Key Features

• Solid carbide construction, material grade C1, uncoated finish for direct metal-to-metal contact applications
• 60-degree triangular included angle in TDHH insert style for internal boring geometry
• 0.007-inch corner radius provides controlled edge definition on tight-tolerance bores
• 15-degree relief angle reduces flank friction during boring passes
• Left-hand cutting orientation matched to TDHH-style left-hand boring bar holders
• Screw-clamp insert holding method for secure, repeatable seating in the pocket

Compatibility

Designed for use in TDHH-style insert toolholders and boring bars configured for left-hand, screw-clamp triangular inserts with a 5/32-inch inscribed circle and 0.0469-inch insert thickness. Verify holder pocket geometry and insert size code 1.280.75.0.5 compatibility before installation.

Installation Notes

Insert installation and tool setup should be performed by a qualified machinist or CNC toolroom technician with the machine in a locked-out, zero-energy state per applicable LOTO procedures. Seat the insert fully into the holder pocket and torque the clamp screw according to the toolholder manufacturer specifications. Inspect the insert pocket for chips or debris before seating to ensure proper contact and prevent insert rocking. Do not exceed the recommended depth of cut or feed rate for the insert grade and workpiece material combination.