Kennametal 4067240 Corner Radius End Mill 5/8 in 4 Flute

Product Description

The KENNAMETAL 4067240 is a solid carbide corner radius end mill designed for demanding material removal in steel, stainless steel, cast iron, and hard materials. It carries a 5/8 inch diameter with a 0.03 inch corner radius and four right-hand spiral flutes ground to a high helix angle of 38 degrees. The AlTiN PVD coating provides thermal resistance and extended tool life in high-speed roughing and finishing operations. At 3.5 inches overall length with a 3/4 inch length of cut, this is a short-length geometry suited for rigidity in tight setups. A Weldon flat shank at 5/8 inch diameter ensures positive drive in compatible toolholders.

This end mill fits CNC machining center applications in job shops, production facilities, and tool rooms where operators need a single tool capable of both roughing and finishing passes. The centercutting design allows plunge entry. Extended reach geometry and the HPHV series designation make it well suited for high-performance, high-velocity cutting strategies in ferrous and hard workpiece materials. Compatible toolholding systems listed by Kennametal include EM-CV Form AD and EM IN-HSK Form A holders.

Key Features

• AlTiN PVD coating for thermal resistance in ferrous and hard material cutting
• 0.03 inch corner radius reduces stress concentration at the cutting edge and improves corner durability
• Centercutting geometry allows direct plunge entry without pre-drilling
• Weldon flat shank provides positive drive and reduces pullout risk under heavy cuts
• High helix angle of 38 degrees promotes chip evacuation and smooth cutting action
• Submicron carbide grade for toughness in interrupted cuts and hard materials

Compatibility

Compatible toolholding systems include EM-CV Form AD and EM IN-HSK Form A holders as specified by Kennametal. Rated for use in steel, stainless steel, cast iron, and hard materials per Kennametal material codes P, M, K, and H.

Installation Notes

Installation is performed by machinists and CNC toolroom technicians. Confirm the toolholder bore matches the 5/8 inch Weldon flat shank before mounting and torque the set screw against the flat per the toolholder manufacturer specification. Power down and lock out the spindle before any tool change. Do not exceed the tool manufacturer recommended speeds and feeds for the workpiece material and depth of cut being run.