Kennametal 1937575 Boring Insert TPCB221 CG5 Solid Carbide

Product Description

The KENNAMETAL 1937575 is a solid carbide boring insert designed for precision metal-cutting operations on lathes and boring bars. Manufactured to TPCB221 geometry with a CG5 micrograin carbide grade, this insert features a 60-degree triangular shape with an 11-degree relief angle. The titanium nitride (TiN) coating is applied via PVD process, improving surface hardness and wear resistance. With an inscribed circle of 0.250 inches and a corner radius of 0.015 inches, it is suited for finishing and semi-finishing passes where dimensional accuracy and surface finish quality are critical priorities.

This insert is used in boring, turning, and light interrupted-cut applications across general machining environments. The TPCB221 geometry fits standard boring bar toolholders that accept triangular inserts with a matching inscribed circle and pocket configuration. Typical applications include ferrous and non-ferrous material machining in job shops, production machining cells, and maintenance shops. It is installed and replaced by machinists and CNC operators as part of routine insert indexing and tooling changeover procedures.

Key Features

• Solid carbide construction with CG5 micrograin grade for consistent edge integrity
• TiN coating via PVD process for enhanced wear resistance and reduced built-up edge
• 60-degree triangular shape (TPCB221) provides up to three usable cutting edges
• 11-degree relief angle reduces cutting forces and tool pressure on the workpiece
• 0.015 inch corner radius suitable for finishing and semi-finishing operations
• 0.250 inch inscribed circle fits standard TPCB-style boring bar toolholders

Compatibility

Designed for use in TPCB-style toolholders that accept triangular inserts with a 0.250 inch inscribed circle and TPCB221 insert geometry. Verify pocket and clamp configuration against the toolholder specification before installation.

Installation Notes

Insert replacement is performed by machinists following standard toolholder lockdown procedures. Power down and de-energize the machine spindle before indexing or replacing any cutting insert. Use the appropriate torx or hex key to secure the insert clamp to the manufacturer-specified seating torque as listed in the toolholder documentation. Inspect the insert pocket for chips, debris, or wear before seating a new insert to ensure proper contact and runout control.