Kennametal 3748378 CNMG432FW KCP05 Carbide Turning Insert

Product Description

The KENNAMETAL 3748378 is a solid carbide turning insert with ANSI insert code CNMG432 and ISO code CNMG120408, designed for precision turning, facing, and boring operations. It carries the KCP05 grade designation and features a multilayer MTCVD coating of TiCN and Al2O3, providing high wear resistance on steel and moderate wear resistance with toughness on aluminum and non-ferrous materials. The insert measures 12.90 mm (0.5077 inches) in length with a 0.5-inch inscribed circle and a 1/32-inch (0.0313-inch) corner radius. The FW chip breaker geometry is a wiper-finishing style, making this insert well suited to light finishing passes where tight tolerances and smooth surface finishes are required. Licensed HVAC techs, machinists, and CNC operators working in production environments are the primary installers.

This insert is intended for use on steel (ISO material group P) and cast iron (ISO material group K) workpieces as its primary applications, with aluminum and non-ferrous materials (ISO group N) as a secondary application. The KENLOC series designation indicates compatibility with KENNAMETAL KENLOC-style toolholders that accept CNMG-geometry inserts. Typical install scenarios include finish-turning operations on lathes and turning centers in both job-shop and high-volume production environments where consistent tool life and surface finish are critical. The 80-degree diamond (rhombic) insert shape provides two usable faces with four cutting edges total, supporting cost-effective edge utilization.

Key Features

• TiCN and Al2O3 multilayer MTCVD coating for high wear resistance on steel and cast iron
• FW wiper-finishing chip breaker geometry for smooth surface finishes at finish-turning depths
• 80-degree diamond insert shape (ISO C) with four cutting edges and neutral hand orientation
• Maximum depth of cut of 1.25 mm (0.0492 inches) suited to light finishing passes
• Negative rake and negative side clearance with honed cutting edge for edge stability under clamp and pin holding
• Conforms to ANSI and ISO standards; UNSPSC code 23242105

Compatibility

Designed for use in KENNAMETAL KENLOC-series toolholders accepting CNMG432 (ISO CNMG120408) insert geometry. Compatible with clamp and pin insert-holding methods. Suitable for turning, facing, and boring operations on steel, cast iron, and aluminum or non-ferrous workpieces.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians following standard insert-change procedures. Power down and lock out the machine spindle before indexing or replacing the insert. Seat the insert fully against the toolholder pocket locating surfaces before tightening the clamp or pin to avoid micro-movement during cutting. Inspect the insert seat and clamp hardware for wear or debris each time the insert is indexed to a fresh cutting edge.