Kennametal 6676503 Corner Radius End Mill 1/2 in 4 Flute Altin

Product Description

The KENNAMETAL 6676503 is a solid carbide corner radius end mill designed for demanding metal removal in steel, stainless steel, cast iron, superalloys, titanium, and hard materials. It carries a 0.5 inch mill diameter with a 0.03 inch corner radius, four flutes, and a 1.25 inch length of cut. The AlTiN PVD coating provides thermal resistance and surface hardness, making this tool well suited for both roughing and finishing passes. It belongs to the H1TE series and features a submicron carbide grade for edge stability at elevated cutting speeds. Licensed machinists and CNC operators in production and job-shop environments are the primary users.

This end mill fits single-end applications in vertical and horizontal CNC machining centers. Its centercutting geometry allows plunge entry, and the Weldon flat shank provides positive drive in standard end mill holders and compatible tooling systems. The right-hand spiral flute direction and right-hand cutting orientation make it a direct fit for conventional CNC milling setups. It is rated for use in steel, stainless steel, cast iron, superalloys and titanium, and hard materials, covering a wide range of production part applications.

Key Features

• 0.03 inch corner radius reduces edge chipping and improves corner strength on milled pockets and profiles
• AlTiN PVD coating delivers oxidation resistance and extended tool life in ferrous and hard-material cutting
• Submicron carbide grade provides consistent edge retention under high cutting forces
• Centercutting design permits direct plunge milling without pre-drilling
• Weldon flat shank ensures secure tool holding and minimal runout in standard holders
• Rated for roughing and finishing in a single tool, reducing changeovers

Compatibility

Compatible with EM-CV Form AD and EM IN-HSK Form A tooling systems as specified by the manufacturer. Designed as a direct-fit replacement or stock tool for CNC machining centers using 1/2 inch straight-shank end mill holders with Weldon flat drive.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the spindle before tool changes. Seat the Weldon flat against the set screw in the holder and torque the set screw per the toolholder manufacturer specification. Verify runout with a dial indicator before beginning a production run, and confirm chip evacuation is adequate for the workpiece material and cutting parameters selected.