Harvey Tool 920508-C6 Corner Radius End Mill 1/8 in 5 Flute

Product Description

The HARVEY TOOL 920508-C6 is a solid carbide corner radius end mill designed for precision milling in hardened steels, stainless steel, cast iron, and hard alloys up to 55 Rc. It features a 1/8 inch cutting diameter, a 0.0050 inch corner radius, and five flutes with a variable helix geometry that reduces harmonic chatter during aggressive cuts. The AlTiN (aluminum titanium nitride) PVD coating provides thermal resistance and extended tool life in ferrous materials. At 2.5 inches overall length with a 3/16 inch length of cut, this is a short-series tool built for rigidity and accuracy in tight-tolerance finishing and roughing applications.

This end mill is suited for mold and die work, hard-part machining, and precision component manufacturing where surface finish and dimensional control are critical. The 37-degree variable helix and close pitch flute configuration support both roughing and finishing passes in a single tool. The 1/4 inch straight cylindrical shank is sized for standard collets and high-precision toolholders. Typical applications include contouring, profiling, and slotting in hardened tool steels and other difficult materials on CNC machining centers.

Key Features

• Solid carbide construction for rigidity and wear resistance in hardened materials
• AlTiN PVD coating rated for high-heat ferrous machining up to 55 Rc
• Variable helix design reduces vibration and chatter during cut
• 5-flute close-pitch configuration supports high feed rates and fine surface finishes
• Corner radius tolerance held to plus or minus 0.0010 inches for consistent edge geometry
• Centercutting design allows plunge entry without a pilot hole

Compatibility

Designed for use with high-precision toolholders. Rated for primary workpiece materials including steel, stainless steel, cast iron, and hard alloys. Part of the Harvey Tool End Mills for Hardened Steels series, Corner Radius style, for steels up to 55 Rc.

Installation Notes

Installation is performed by machinists or CNC setup technicians using a collet chuck or precision shrink-fit toolholder matched to the 1/4 inch shank diameter. Ensure the machine spindle and toolholder are clean and free of runout before seating the tool. Follow the tool manufacturer feed and speed recommendations for the specific workpiece hardness and material grade. Do not exceed the rated material hardness of 55 Rc to avoid premature edge failure.