Harvey Tool 763516-C6 Ball End Mill 1/4 in 6 Flute Carbide

Product Description

The HARVEY TOOL 763516-C6 is a solid carbide ball end mill engineered for material removal in hardened steels ranging from 45 to 68 Rc. With a 1/4 inch cutting diameter, six flutes, and a variable helix geometry at 20 degrees, it maintains stable cutting action and reduces chatter in difficult workpiece materials. The AlTiN Nano PVD coating provides thermal resistance and wear protection at elevated surface speeds. At 2.5 inches overall length with a 3/4 inch length of cut, it suits a wide range of roughing operations in hardened tool steel, die steel, and similarly hard materials. Installation is performed by machinists and CNC operators.

This end mill is designed for single-end roughing applications in hardened ferrous materials classified under material grade H. The 3/4 inch reach length and straight cylindrical 1/4 inch shank allow direct use in standard collet chucks and end mill holders on vertical machining centers and high-speed spindles. It is a material-specific tool from Harvey Tool's End Mills for Hardened Steels - Ball series, intended where conventional high-speed steel or uncoated carbide tooling cannot sustain cutting edge integrity.

Key Features

• Solid carbide substrate provides rigidity and edge retention in 45-68 Rc hardened steels
• AlTiN Nano PVD coating delivers high thermal resistance and extended tool life at elevated cutting speeds
• Variable helix design at 20 degrees reduces harmonic vibration and chatter during roughing passes
• Six-flute configuration increases feed rate capability and improves surface finish in hard material roughing
• Ball nose geometry produces accurate radius features and contoured surfaces in die and mold work
• Right-hand cut, right-hand spiral with no chipbreaker for clean chip evacuation in ferrous materials

Compatibility

Designed for use in hardened steels from 45 to 68 Rc as part of the Harvey Tool End Mills for Hardened Steels - Ball series, Material Specific End Mills. Fits standard 1/4 inch collet chucks and end mill holders with an h6 shank diameter tolerance.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Secure the shank in a properly sized collet or end mill holder and verify runout before operation. Always power down and lock out the spindle before changing tooling. Do not exceed the recommended depth of cut or engagement for the workpiece hardness — consult the manufacturer's speeds and feeds documentation for the specific material and coating combination.