Kennametal 4071924 Corner Radius End Mill 0.5in 4 Flute Altin

Product Description

The KENNAMETAL 4071924 is a solid carbide corner radius end mill designed for demanding metal removal in steel, stainless steel, cast iron, and hard material applications. With a 0.5-inch mill diameter, a 0.03-inch corner radius, and a 4-flute configuration, this tool delivers both roughing and finishing capability in a single pass. The AlTiN PVD coating provides heat resistance and extended tool life under high-speed cutting conditions. The HPHV series designation indicates a high-performance, high-velocity geometry engineered to maintain edge integrity in difficult workpiece materials.

This end mill suits CNC machining centers and manual mills in job shops, production machining, and toolroom environments. The extended-reach geometry with a 1.625-inch length of cut makes it suitable for slotting, profiling, and shoulder milling in pockets with depth requirements that standard-length tools cannot address. The Weldon flat shank provides positive drive engagement in collet holders and Weldon-style tool holders, reducing pullout risk under heavy cuts. Compatible holder systems noted in product data include EM-CV Form AD and EM IN-HSK Form A toolholders.

Key Features

• 0.03-inch corner radius reduces stress concentration and extends tool life versus sharp-corner end mills
• AlTiN PVD coating improves heat resistance for dry or near-dry cutting in ferrous materials
• Submicron carbide grade provides hardness and wear resistance in hard and abrasive workpiece materials
• Extended-reach length of cut (1.625 inches) for deep pocket and shoulder milling
• Weldon flat shank for positive drive engagement and reduced pullout
• Single-end, centercutting design allows plunge entry and full-slot milling
• Right-hand cut, right-hand spiral flute geometry suitable for standard spindle rotation

Compatibility

Designed for use with EM-CV Form AD and EM IN-HSK Form A toolholders as noted in product specifications. Rated for primary workpiece materials including steel (P), stainless steel (M), cast iron (K), and hard materials (H) per ISO material classification codes.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the Weldon flat shank fully into the holder and tighten the set screw against the flat to the toolholder specification before running. Verify runout with a dial indicator after setup and before initiating a cut, particularly given the tight shank diameter tolerance of +0.00000 / -0.00043 inches.