Kennametal 6143964 Square End Mill 3/8 in 3 Flute Carbide

Product Description

The KENNAMETAL 6143964 is a single-end square end mill designed for precision milling of steel, stainless steel, and cast iron. Built from solid carbide in the KC633M grade and finished with a TiAlN coating, it delivers the heat resistance and edge retention required in high-performance cutting operations. The tool measures 0.375 inches in diameter with a 1-inch length of cut, a 0.375-inch shank diameter, and a 2.5-inch overall length. Three spiral flutes with a 30-degree helix angle promote efficient chip evacuation and surface finish. Centercutting capability allows plunge entry directly into the workpiece. Right-hand cut and right-hand flute geometry are standard.

This end mill is suited for ferrous machining applications in job shop, production, and maintenance environments. It performs in general-purpose milling operations including slotting, profiling, and peripheral cuts in steel and stainless steel components, as well as cast iron workpieces. The compact 0.375-inch diameter makes it appropriate for detail features, narrow slots, and tight-tolerance cavities. It is typically run on CNC machining centers and manual knee mills where solid carbide tooling is required for material hardness or surface finish requirements.

Key Features

• Solid carbide KC633M substrate for rigidity and wear resistance in ferrous materials
• TiAlN coating improves oxidation resistance and extends tool life at elevated cutting temperatures
• 3-flute design balances chip room and core strength for slotting and profiling
• 30-degree helix angle promotes smooth cutting action and effective chip evacuation
• Centercutting geometry enables direct plunge milling without a pre-drilled pilot
• Right-hand cut, right-hand flute — compatible with standard spindle rotation on most machining equipment

Compatibility

Designed for machining steel, stainless steel, and cast iron workpieces, corresponding to material codes P, M, and K. Part of the KENNAMETAL 3SE series. Fits any tool holder accepting a 0.375-inch straight shank.

Installation Notes

Installation and tool changes should be performed with the machine spindle fully stopped and power isolated. Seat the shank fully into the collet or end mill holder and torque the retention mechanism per the tool holder manufacturer specification. Carbide tooling is brittle — avoid impact loading or side pressure during setup. Verify runout with a dial indicator before initiating a cut to maximize tool life and part accuracy.