Kennametal 3873498 KCPM20 Hexagon Milling Insert 12-edge

Product Description

The KENNAMETAL 3873498 is a double-sided hexagonal milling insert in grade KCPM20, manufactured from solid carbide and finished with a multilayer MTCVD coating of TiN, TiCN, and Al2O3. The hexagonal HNGJ insert style provides 12 usable cutting edges per insert, delivering a strong cost-per-edge value for high-volume milling operations. The insert carries a negative rake geometry with a chamfered and honed cutting edge style, a 0-degree relief angle, and a corner radius of 3/64 inch (0.0468 inch decimal). An inscribed circle of 0.625 inches and a thickness of 0.2151 inches place this insert in the standard HNGJ535 size class. Licensed HVAC and machining trades recognize this as a precision tooling component requiring proper toolholder selection before installation.

This insert is designed for milling applications across steel, stainless steel, cast iron, and hard materials — workpiece material codes P, M, K, and H. It is compatible with the Kennametal Dodeka cutter series and suits the HNGJ0905ANSNHD toolholder standard. The HD chip breaker designation targets moderate to heavy stock-removal passes in both roughing and semi-finishing contexts across industrial production environments.

Key Features

• 12 cutting edges per insert from double-sided hexagonal geometry — maximizes tool life value per unit
• MTCVD multilayer coating: TiN, TiCN, and Al2O3 for thermal resistance and wear protection on steel and cast iron
• KCPM20 grade with HD chip breaker — suited for moderate to heavy milling depths in difficult workpiece materials
• Neutral hand orientation — fits left- or right-hand toolholder pockets without restriction
• Maximum depth of cut: 0.3383 inches
• Conforms to ANSI and ISO standards (ANSI code HNGJ535ANSNHD, ISO code HNGJ0905ANSNHD)

Compatibility

Compatible with the Kennametal Dodeka cutter series. Toolholder reference: HNGJ0905ANSNHD (ISO) and HNGJ535ANSNHD (ANSI). Screw-held mounting method. Suitable for machining steel, stainless steel, cast iron, and hard materials.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and locked out before seating or replacing inserts. Use the correct torque driver per the toolholder manufacturer specification for the clamping screw — over-tightening can crack the carbide body. Inspect the insert pocket for wear or debris before seating a new insert to maintain proper seating depth and runout.