Harvey Tool 27260-C3 Corner Radius End Mill 0.06 in 4 Fl

Product Description

The HARVEY TOOL 27260-C3 is a miniature corner radius end mill designed for precision milling in tight-tolerance applications. Built from micrograin solid carbide and coated with AlTiN via a PVD process, this single-end tool handles both roughing and finishing operations. It features a 0.06-inch cutting diameter, a 0.01-inch corner radius, four right-hand helical flutes at a 30-degree helix angle, and a 1/8-inch straight cylindrical shank. The AlTiN coating improves heat resistance and tool life when cutting ferrous and hard materials. Licensed machinists and CNC operators working in production or job-shop environments rely on this geometry for small-feature work where edge integrity and radius consistency are critical.

This end mill is suited for milling steel, stainless steel, cast iron, non-ferrous metals, and composite materials. The stub and standard miniature series geometry makes it effective in applications requiring short, rigid tool reach with controlled corner radius blending. It mounts in a standard toolholder accepting a 1/8-inch shank and is center-cutting, allowing plunge entry where needed. Typical use cases include die and mold work, medical component machining, and aerospace part finishing where small diameters and precise radii are required.

Key Features

• Micrograin solid carbide construction for rigidity and wear resistance in demanding cuts
• AlTiN PVD coating extends tool life in steel, stainless steel, and cast iron
• 0.01-inch corner radius with tight tolerance of plus or minus 0.001 inches for consistent blending
• 4-flute, right-hand cut and flute direction optimized for both roughing and finishing
• 30-degree helix angle promotes smooth chip evacuation in helical flute geometry
• Center-cutting design allows direct plunge milling without pre-drilling

Compatibility

Designed for use with standard toolholders accepting a 1/8-inch straight cylindrical shank. Suitable for machining steel, stainless steel, cast iron, non-ferrous metals, and composite workpiece materials as designated by material codes P, M, K, N, and O.

Installation Notes

Installation is performed by qualified CNC machinists or manual mill operators using a compatible toolholder rated for the 1/8-inch shank diameter. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before loading or removing the tool. Verify runout and tool projection before beginning a cut, as miniature-diameter end mills are sensitive to setup error. Coolant-through is not supported on this tool; apply flood or mist coolant externally as appropriate for the workpiece material.