Kennametal 5698139 TNMG544RN KCP25B Carbide Turning Insert

Product Description

The KENNAMETAL 5698139 is a solid carbide turning insert in the TNMG544RN geometry with KCP25B grade designation. It features a multilayer CVD coating system consisting of TiCN, Al2O3, and TiOCN, engineered for moderate wear resistance and toughness across a broad range of cutting applications. The insert carries a 60-degree triangular shape with a neutral hand orientation, a 5/8-inch inscribed circle, and a 1/16-inch corner radius. It belongs to the KENLOC series and is designed for use by machinists and CNC turning specialists working in production and job-shop environments.

This insert is rated for turning, facing, and boring operations at roughing and medium machining chip loads. Primary workpiece materials include steel and cast iron, with additional suitability for aluminum and non-ferrous materials. The RN chip breaker geometry supports consistent chip control across varying depths of cut. The insert conforms to both ANSI and ISO standards, carrying the ANSI code TNMG544 and the ISO code TNMG270616RN, making it a recognized industry-standard geometry for multi-use CNC lathe and turning center applications.

Key Features

• KCP25B grade with multilayer MTCVD coating: TiCN, Al2O3, and TiOCN for extended tool life in steel and cast iron
• TNMG triangular insert shape with 60-degree included angle and negative rake for strong edge geometry
• RN chip breaker supports roughing and medium machining chip loads
• 6 total cutting edges per insert for maximum utilization
• Neutral hand orientation allows use in right-hand or left-hand toolholders where geometry permits
• Compatible with clamp and pin insert-holding methods per KENLOC toolholder system

Compatibility

Designed for use in KENLOC-series toolholders accepting TNMG544 geometry inserts. Conforms to ANSI and ISO insert standards, making it interchangeable with tooling systems designed for ANSI TNMG544 or ISO TNMG270616 insert seats.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque wrench and KENLOC clamping hardware to secure the insert; do not over-tighten the clamp screw by hand without a calibrated tool. Inspect the insert seat and chip pocket for debris before seating a new edge.