Kennametal 6676421 Corner Radius End Mill 0.5in 4 Flute Altin

Product Description

The KENNAMETAL 6676421 is a solid carbide corner radius end mill designed for high-performance milling in demanding materials. Built on the H1TE series platform, it features a 0.5 inch diameter, a 0.090 inch corner radius, and an AlTiN (aluminum titanium nitride) PVD coating that supports elevated cutting temperatures and extends tool life. With 4 right-hand spiral flutes and a 36-degree helix angle, this single-end, centercutting tool is suited for both roughing and finishing passes. It is installed and operated by machinists and CNC programmers working in job shop, aerospace, die and mold, and general precision machining environments.

This end mill is rated for use in steel, stainless steel, cast iron, superalloys, titanium, and hard materials. The short-length-of-cut geometry and straight cylindrical shank make it compatible with standard end mill toolholders. The 1 inch length of cut and 3 inch overall length position it for slotting, profiling, and contouring applications where corner geometry control is critical. It performs equally in roughing and finishing operations without a tool change.

Key Features

• AlTiN PVD coating resists heat and oxidation in high-speed cutting of ferrous and hard materials
• 0.090 inch corner radius reduces stress concentration at the cutting edge and improves surface finish at part corners
• Solid submicron carbide substrate provides rigidity and wear resistance across the rated material grades
• 4-flute, right-hand spiral design with 36-degree helix angle supports aggressive chip evacuation and smooth cutting action
• Centercutting geometry allows plunge entry without a pre-drilled pilot hole
• Single-end configuration with a straight cylindrical shank fits standard end mill toolholders without modification

Compatibility

Designed for use with standard end mill toolholders. Rated for primary workpiece materials including steel, stainless steel, cast iron, superalloys, titanium, and hard materials per material codes P, M, K, S, and H.

Installation Notes

Installation is performed by a qualified machinist or CNC operator. Secure the straight cylindrical shank in a properly sized end mill toolholder and confirm runout before engaging the cut. Verify spindle direction is set to right-hand rotation before starting the machine. Follow the machine tool manufacturer and Kennametal recommended speeds and feeds for the specific workpiece material and depth of cut.