Kennametal 5698169 CPMT2151LF Turning Insert KCP25B Carbide

Product Description

The KENNAMETAL 5698169 is a solid carbide turning insert in the CPMT2151LF geometry, graded KCP25B and finished with a multilayer MTCVD coating of TiCN, Al2O3, and TiOCN. The 80-degree diamond shape with a positive rake angle of 5 degrees and a honed cutting edge delivers consistent, controlled cuts in steel and cast iron. With an inscribed circle of 0.25 inches, an insert length of 6.45 mm (0.2539 inches), and a corner radius of 1/64 inch (0.0156 inches), this insert fits screw-on toolholders designed for CPMT-style indexable inserts. Two cutting edges are available per insert. Installation and replacement are handled by qualified machinists and CNC operators.

This insert is designed for turning, facing, and boring operations on steel and cast iron workpieces. The KCP25B grade and CVD multilayer coating make it well suited for medium to moderate finishing cuts where thermal and abrasion resistance are priorities. The neutral hand orientation and screw-on holding method allow it to seat consistently in compatible CPMT toolholders. It conforms to ANSI and ISO standards and carries the ISO code CPMT21.51, making cross-referencing to toolholder catalogs straightforward for machinists sourcing replacements or building new tooling setups.

Key Features

• KCP25B grade solid carbide with MTCVD multilayer TiCN / Al2O3 / TiOCN coating for extended tool life in steel and cast iron
• 80-degree diamond insert shape (Shape Code C) with positive rake and honed cutting edge for clean, controlled material removal
• Screw-on holding method with 0.1142-inch hole diameter for secure, repeatable insert indexing
• Two cutting edges per insert; neutral hand orientation suits a wide range of CPMT toolholder setups
• Maximum depth of cut of 0.0845 inches supports finishing and light medium-cut applications
• Compliant with ANSI and ISO standards; ISO code CPMT21.51 for direct catalog cross-reference

Compatibility

Designed for use in screw-on CPMT-style indexable toolholders conforming to ANSI and ISO CPMT21.51 specifications. Primary workpiece materials are steel (P) and cast iron (K). Suitable for turning, facing, and boring operations.

Installation Notes

Insert seating and indexing should be performed by a qualified machinist or CNC operator with the machine fully stopped and de-energized. Use the manufacturer-specified torque wrench or screwdriver to tighten the clamp screw — do not overtighten, as this can fracture the carbide substrate. Inspect the toolholder pocket for chips or debris before seating a new insert. Verify insert orientation and hand before resuming cuts.