Kennametal 6131603 Milling Insert KCPK30 LNGU432SRGEM Carbide

Product Description

The KENNAMETAL 6131603 is a solid carbide milling insert graded KCPK30, designed for indexable face and shoulder milling operations on machining centers and milling machines. The insert carries a CVD-applied multilayer coating of TiN, TiCN, and Al2O3, which provides thermal resistance and wear protection across a range of cutting conditions. It features a rectangular LNGU insert style with a 90-degree included angle, four usable cutting edges, a positive rake geometry, and a GEM chip breaker. The corner radius measures 0.031 inches, and thickness is 0.1875 inches. The insert is held in the cutter body by a screw clamp and is intended for right-hand cutting. This is a single-sided insert sold individually, with a minimum order quantity of 10 units.

The KENNAMETAL 6131603 is suited for milling steel, stainless steel, cast iron, superalloys, and titanium in both roughing and semi-finishing applications. It is compatible with the Kennametal Mill 4-11 cutter series per the supplier-provided cutter series compatibility data. The ANSI code is LNGU432SRGEM and the ISO code is LNGU110408SRGEM. Typical applications include face milling, shoulder milling, and pocketing on CNC machining centers in job shop, aerospace, and general metalworking production environments. Installation requires a compatible LNGU-style toolholder designed for 4-11 mm insert pockets.

Key Features

• CVD multilayer coating: TiN, TiCN, and Al2O3 for wear and thermal resistance
• Four cutting edges per insert, maximizing cost per edge on solid carbide tooling
• Positive rake geometry with GEM chip breaker for controlled chip formation
• 0.031-inch corner radius with chamfered and honed cutting edge preparation
• Compatible with Mill 4-11 cutter series per manufacturer data
• Rated for steel (P), stainless steel (M), cast iron (K), and superalloys and titanium (S) per ISO material grade codes

Compatibility

Designed for use in Kennametal Mill 4-11 cutter bodies that accept LNGU-style inserts. ANSI designation LNGU432SRGEM and ISO designation LNGU110408SRGEM. Verify pocket geometry and screw size against your specific toolholder before installation.

Installation Notes

Insert installation should be performed by a qualified machinist or tooling technician with the spindle fully stopped and the machine in a locked-out, tagged-out state. Seat the insert fully into the pocket and tighten the clamping screw to the torque specification published in the Kennametal toolholder documentation for the Mill 4-11 series. Inspect the insert pocket for chips, debris, or wear before seating a new insert, as contamination will affect runout and edge life. Do not mix used and new inserts on the same cutter body in finishing passes.