Harvey Tool 908916-C6 Corner Radius End Mill 1/4 in 4 Flute

Product Description

The HARVEY TOOL 908916-C6 is a single-end, solid carbide corner radius end mill designed for high-performance milling in demanding materials including steel, stainless steel, cast iron, and hard alloys. The tool measures 1/4 inch in diameter with a 3/8 inch length of cut, a 2-1/2 inch overall length, and a 0.005 inch corner radius that protects the cutting edge and reduces stress concentrations at corners. An AlTiN (aluminum titanium nitride) PVD coating delivers elevated heat resistance, making this end mill well suited to high-temperature alloy applications. The variable helix geometry reduces harmonic vibration and improves chip evacuation, supporting consistent material removal across both roughing and finishing passes. Machinists and CNC programmers working in job shops, aerospace, and precision manufacturing will find this tool appropriate for high-demand production cycles.

This end mill is part of the HARVEY TOOL Variable Helix End Mills for High Temp Alloys - Corner Radius series. It is intended for use in steel, stainless steel, cast iron, and hard alloy workpiece materials, corresponding to ISO material codes P, M, K, and H. The right-hand cut and right-hand flute direction make it compatible with standard CNC milling spindles. The straight cylindrical 1/4 inch shank seats in a high-precision toolholder, which is the recommended holding method for this tool. The short flute length classification suits applications requiring rigidity in shallow-to-moderate depth-of-cut scenarios.

Key Features

• 0.005 inch corner radius with tolerance of plus 0.0010 to minus 0.0010 inch for edge protection and reduced workpiece stress
• Variable helix geometry minimizes chatter and improves surface finish in difficult materials
• AlTiN PVD coating provides high heat resistance suited to high-temperature alloy machining
• 4 helical flutes in a right-hand cut, right-hand flute configuration for efficient chip removal
• Centercutting design allows plunge entry into the workpiece
• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials

Compatibility

Designed for use with high-precision toolholders in CNC milling applications involving steel, stainless steel, cast iron, and hard alloys. Part of the HARVEY TOOL Variable Helix End Mills for High Temp Alloys - Corner Radius series.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before installing or removing the end mill. Seat the straight cylindrical shank fully in a high-precision toolholder and torque the retention mechanism according to the toolholder manufacturer specifications. Inspect the cutting edges and coating for chips or wear before each use, and verify runout with an indicator prior to production cuts.