Hertel H59875278 Boring Insert TD6P4 HP520B Solid Carbide

Product Description

The HERTEL H59875278 is a solid carbide boring insert designed for precision internal boring operations on CNC lathes and machining centers. Manufactured to the TD6P4 insert style in the HP520B grade, it features a physical vapor deposition (PVD) TiN coating that improves wear resistance and extends tool life in a range of workpiece materials. The insert has a 60-degree included angle with a triangular shape, a 3/8 inch inscribed circle, 1/8 inch thickness, a 1/16 inch corner radius, and an 11-degree relief angle. A screw-clamping hold method keeps the insert securely seated during cutting. This insert is sold individually and requires a minimum order of 10 units.

This insert is suited for production and job-shop boring applications where dimensional accuracy and surface finish are critical. The TiN-coated solid carbide construction makes it appropriate for use on ferrous and non-ferrous materials at moderate to high cutting speeds. It is typically installed and indexed by machinists and CNC operators in boring bar toolholders that accept the TD6P4 seat configuration. The HP520B grade and C5 material classification position this insert for general-purpose finish and semi-finish boring passes.

Key Features

• Solid carbide substrate with PVD TiN coating for extended wear resistance
• 60-degree triangular insert shape (TD6P4 style) with 11-degree relief angle
• 3/8 inch inscribed circle and 1/8 inch thickness for stable seating in compatible toolholders
• 1/16 inch corner radius (0.0630 inches decimal) balances edge strength with surface finish quality
• Screw-clamping insert holding method for positive, repeatable positioning
• HP520B manufacturer grade, C5 material grade, suitable for general-purpose finish and semi-finish boring

Compatibility

Designed as an OEM-style replacement or direct-fit boring insert for toolholders accepting TD6P4 style inserts with a 3/8 inch inscribed circle and screw-clamping seat geometry.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torx or hex key to tighten the clamping screw to the toolholder manufacturer's specified torque; do not overtighten, as this can crack the carbide substrate. Inspect the insert pocket and screw threads for debris or damage before seating the new insert.