Kennametal 4047725 Corner Radius End Mill 1/4 in 4 Flute

Product Description

The KENNAMETAL 4047725 is a solid carbide corner radius end mill built for high-performance material removal in steel, stainless steel, cast iron, and hard materials. It carries a 0.015 inch corner radius and a 4-flute, right-hand spiral configuration suited for both roughing and finishing operations. The AlTiN PVD coating provides thermal resistance and extended tool life in demanding cutting environments. At 2.5 inches overall length with a 0.75 inch length of cut, this is a single-end, center-cutting tool designed for use by machinists and CNC operators working on precision components requiring tight corner geometry control.

This end mill is part of the HPHV series, optimized for high-helix, high-performance cutting in production environments. The straight cylindrical shank at 0.25 inch diameter makes it compatible with standard collet chucks, shrink-fit holders, and hydraulic toolholding systems. It is suited for milling operations on ferrous alloys and hard materials where corner edge integrity and surface finish matter. The extended reach geometry supports applications where tool clearance is a factor in the setup.

Key Features

• Solid carbide submicron-grade construction for rigidity and wear resistance in hard-material applications
• AlTiN PVD coating provides oxidation resistance and thermal stability at elevated cutting temperatures
• 0.015 inch corner radius reduces stress concentration at the cutting edge and improves surface finish
• Center-cutting, right-hand flute direction allows plunge entry and climb milling
• 4-flute spiral geometry supports both roughing and finishing in a single tool
• Compatible with HC hydraulic sleeve toolholders in inch and metric configurations

Compatibility

Designed for use with HC 1/2 - HC 1 1/4 Hydraulic Sleeves Inch with Inch Bores, HC 20M - HC 32M Hydraulic Sleeves Metric with Inch Bores, and HC-CV Form AD toolholding systems. Primary workpiece materials include steel (P), stainless steel (M), cast iron (K), and hard materials (H).

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and the machine in a safe, locked-out state. Ensure the shank is properly seated and clamped to the specified holding torque for the toolholder type in use, following the toolholder manufacturer guidelines. Inspect the cutting edges and corner radius for chips or wear before each use. Confirm runout is within acceptable tolerance after seating to prevent premature edge failure.