Hertel H59874404 Boring Insert TPCG220.5 Solid Carbide Tin

Product Description

The HERTEL H59874404 is a solid carbide boring insert in the TPCG style, designed for precision internal boring operations on CNC lathes and boring machines. It carries the HP520B manufacturer grade with a physical vapor deposition (PVD) applied titanium nitride (TiN) coating, which improves wear resistance and extends tool life across a range of workpiece materials. The insert features a 60-degree triangular geometry with an 11-degree relief angle and a 0.007 inch corner radius, making it well suited for finishing and semi-finishing passes where edge sharpness and dimensional accuracy are critical. Installation is by screw-lock clamp, and the insert is ground for left-hand cutting orientation.

This insert is intended for use in screw-retained boring bar systems that accept TPCG-style inserts with a 1/4 inch inscribed circle and 3/32 inch thickness. Typical applications include finish boring of bores, housings, and precision holes in ferrous and non-ferrous materials across production and job-shop environments. The C5 carbide grade with TiN coating targets steel and cast iron at moderate to high cutting speeds. A licensed machinist or CNC tooling technician is the typical end user for this insert style.

Key Features

• Solid carbide substrate with PVD TiN coating for improved wear resistance
• TPCG insert style with 60-degree triangular geometry and 11-degree relief angle
• 0.007 inch corner radius suited for semi-finish and finish boring passes
• Screw-lock insert holding method for secure, repeatable seating
• Left-hand cutting orientation
• C5 carbide material grade appropriate for steel and cast iron applications

Compatibility

Designed as a direct-fit replacement for screw-retained boring bar holders accepting TPCG-style inserts with a 1/4 inch inscribed circle and 3/32 inch thickness.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician with the machine powered down and the spindle locked before index or replacement. Use the appropriate torque wrench and insert screw specified by the boring bar manufacturer when securing the screw-lock clamp. Inspect the insert pocket and clamp screw for wear or damage before seating a new insert. Do not exceed the cutting parameters recommended for the C5 grade and TiN coating combination.