Harvey Tool 848878-C6 Corner Radius End Mill 0.078in Altin

Product Description

The HARVEY TOOL 848878-C6 is a solid carbide corner radius end mill engineered for high-temperature alloy machining. It carries a 0.078-inch mill diameter, a 0.025-inch corner radius, and three variable-helix flutes that reduce harmonics and chatter during aggressive cuts. The AlTiN (aluminum titanium nitride) PVD coating adds heat resistance and surface hardness, extending tool life in demanding applications. With a 1/8-inch straight-cylindrical shank and a 1.5-inch overall length, this single-end, center-cutting tool is sized for tight-tolerance finishing and roughing operations in small-part and die-mold work. A licensed machinist or CNC tooling specialist installs and runs this tool.

This end mill is designed for milling steel, stainless steel, cast iron, and hard alloys. It belongs to Harvey Tool's Variable Helix End Mills for High Temp Alloys - Corner Radius series, making it well suited for ISO material groups P, M, K, and H. The 15/64-inch (0.9375-inch) length of cut and right-hand flute direction with right-hand cutting orientation are standard for most vertical and horizontal CNC machining center setups. It is recommended for use with a high-precision toolholder to maintain runout control at the small diameters involved.

Key Features

• Variable helix geometry reduces chatter and vibration in high-temp alloy cuts
• AlTiN PVD coating provides elevated heat resistance and extended tool life
• Center-cutting design allows plunge entry without a pilot hole
• Capable of both roughing and finishing material removal in a single tool
• Tight tolerance control: mill diameter held to plus 0.0005 / minus 0.0005 inches, corner radius to plus 0.0010 / minus 0.0010 inches
• Straight-cylindrical shank compatible with standard collet and shrink-fit toolholders

Compatibility

Designed for machining steel, stainless steel, cast iron, and hard alloys (ISO material groups P, M, K, H). Recommended for use with a high-precision toolholder. Part of the Harvey Tool Variable Helix End Mills for High Temp Alloys - Corner Radius series.

Installation Notes

Installation and setup should be performed by a qualified CNC machinist or tooling technician. Before changing tooling, confirm the spindle is fully stopped and the machine is in a safe state per the equipment manufacturer's lockout procedure. Seat the 1/8-inch shank fully into the collet or toolholder and torque the retention nut to the toolholder manufacturer's specification. Do not exceed the tool's rated diameter-to-depth ratio without consulting cutting data tables, and always verify runout at the tool tip before commencing a cut.