Kennametal 7026645 CNMG542RN KCP25C Turning Insert

Product Description

The KENNAMETAL 7026645 is a CNMG542RN carbide turning insert in the KCP25C grade, designed for indexable toolholders used in turning, facing, and boring operations. The insert features a multilayer CVD coating — TiN, Al2O3, and MT-TiCN — applied over a carbide substrate to extend tool life in demanding cutting applications. It carries a diamond (80-degree) insert shape with a negative rake angle, a chamfered and honed cutting edge style, and four usable cutting edges per insert. The 0.0313-inch corner radius and KENLOC series geometry make this a practical choice for general-purpose metal removal where consistent edge performance is required.

This insert is suited for machining steel and cast iron workpieces in both roughing and semi-finishing passes. The CNMG542RN chip breaker geometry and neutral hand orientation allow installation in a wide range of CNMG-compatible toolholders used in CNC turning centers and manual lathes. The 80-degree diamond shape provides strong edge support while allowing reasonable clearance in profiling cuts. Licensed machinists, toolroom technicians, and CNC operators are the primary users. With a maximum depth of cut of 0.2113 inches, this insert is well-matched to medium-duty turning applications where steel and cast iron are the primary materials.

Key Features

• Multilayer CVD coating: TiN outer layer, Al2O3 intermediate layer, MT-TiCN base layer for wear and crater resistance
• Four cutting edges per insert for cost-effective indexing
• 80-degree diamond insert shape with negative rake for strong edge support
• Chamfered and honed cutting edge style reduces microchipping on entry
• KENLOC series geometry with RN chip breaker suits turning, facing, and boring
• Clamp and pin insert holding method compatible with standard CNMG toolholders

Compatibility

Designed for use in CNMG-style indexable toolholders compatible with the KENLOC series. Rated for primary workpiece materials steel (ISO P) and cast iron (ISO K). Conforms to ANSI and ISO standards for CNMG160608RN geometry. Industry standard number CNMG542RN.

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque on the clamping screw as specified by the toolholder manufacturer — do not overtighten, as this can crack the insert or damage the pocket seat. Inspect the insert pocket and locating pin for debris or wear before seating a new insert.