Kennametal 4047735 Corner Radius End Mill 0.25in 4 Flute Altin

Product Description

The KENNAMETAL 4047735 is a solid carbide corner radius end mill designed for high-performance material removal in demanding machining environments. With a 0.25-inch cutting diameter, a 0.015-inch corner radius, and four flutes in a right-hand spiral configuration, this tool delivers both roughing and finishing capability in a single pass. The AlTiN PVD coating provides thermal resistance and extended tool life when cutting hard and abrasive materials. The extra-long design features a 1.75-inch length of cut and a 4-inch overall length, supporting extended-reach applications where standard-length tooling cannot access the workpiece. A straight-cylindrical 0.25-inch shank provides secure clamping in compatible hydraulic and collet toolholding systems. Installed by machinists and CNC tooling specialists in production and job-shop environments.

This end mill is rated for use on steel, stainless steel, cast iron, and hard materials, covering ISO material groups P, M, K, and H. The HPHV series designation indicates a high-performance, high-velocity design optimized for aggressive feed rates and tight tolerances on hardened workpieces. The centercutting geometry allows plunge entry, adding flexibility in 3-axis and multi-axis milling routines. The extra-long reach and single-end configuration make it well suited for deep-pocket milling, cavity work, and contour finishing where tool clearance is limited.

Key Features

• 0.015-inch corner radius reduces stress concentrations and extends tool life on contoured features
• AlTiN PVD coating provides high-temperature resistance for dry or semi-dry cutting on steel and hard materials
• Extra-long reach with 1.75-inch length of cut and 4-inch overall length for deep-pocket and extended-reach applications
• Centercutting design allows direct plunge entry without a pre-drilled hole
• Right-hand flute direction with normal pitch supports stable chip evacuation in steel and stainless
• Submicron carbide grade substrate delivers hardness and fracture toughness for interrupted cuts and hard materials

Compatibility

Compatible with HC 1/2 through HC 1-1/4 Hydraulic Sleeves Inch with Inch Bores, HC 20M through HC 32M Hydraulic Sleeves Metric with Inch Bores, and HC-CV Form AD toolholding systems as specified by the manufacturer.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the tool changer or turret is in a safe state before mounting or removing the end mill. Verify runout after clamping in the hydraulic sleeve or collet holder, as excessive runout accelerates wear on small-diameter carbide tools. Follow the machine tool manufacturer and toolholder manufacturer guidelines for clamping force and projection length.