Kennametal 5641115 Turning Insert VNMG331MP KCM15B Carbide

Product Description

The KENNAMETAL 5641115 is a VNMG331MP geometry turning insert in the KENLOC series, manufactured from solid carbide with a multilayer MTCVD TiCN and Al2O3 coating under the KCM15B grade designation. This neutral-hand insert features a 35-degree diamond (rhombic) shape, a 3/8-inch inscribed circle, a 1/64-inch corner radius, and a negative rake and relief angle geometry. It is designed for roughing and medium machining operations on steel, stainless steel, and superalloys. HVAC, plumbing, and electrical trades do not apply here — this insert is used by machinists and CNC operators in metalworking environments. The KCM15B grade balances moderate wear resistance with toughness for P- and M-class workpiece materials.

This insert is suited for turning, facing, boring, back turning, and back boring operations on steel and stainless steel components. The MP chip breaker geometry handles both roughing and medium machining passes, making it a practical choice when a single insert style needs to cover a range of depths of cut up to 0.4354 inches. The four available cutting edges and clamp-and-pin holding method are consistent with standard VNMG toolholder setups used in production and job-shop CNC turning applications.

Key Features

• VNMG331MP geometry with 35-degree diamond shape and negative rake for steel and stainless steel turning
• KCM15B grade: multilayer MTCVD TiCN plus Al2O3 coating for wear resistance and toughness balance
• MP chip breaker supports roughing and medium machining in a single insert style
• Four cutting edges per insert; neutral hand for flexible toolholder orientation
• Clamp and pin holding method compatible with standard KENLOC toolholders
• Maximum depth of cut of 0.4354 inches; 1/64-inch corner radius for edge integrity under load

Compatibility

Designed for use in KENLOC-series VNMG toolholders. ANSI insert code VNMG331, ISO insert code VNMG160404. Conforms to ANSI and ISO standards. Compatible with toolholders specifying clamp-and-pin retention and VNMG insert geometry. Suitable for primary workpiece materials coded P (steel) and M (stainless steel and superalloys).

Installation Notes

Installation is performed by machinists or CNC setup technicians. Power down and lock out the machine spindle before seating or indexing the insert. Inspect the toolholder pocket and seating surfaces for chips or debris before installation, as contamination can affect insert seating and tool life. Follow the toolholder manufacturer's clamping torque specifications for the VNMG pocket style — do not overtighten, as carbide inserts are brittle and can fracture under excessive clamp force.