Accupro 12180840 Corner Radius End Mill 3/8 in 7 Flute

Product Description

The ACCUPRO 12180840 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining environments. It features a 3/8 inch diameter cutting head with a 0.0200 inch corner radius and seven flutes, delivering a fine surface finish while managing chip load effectively at higher feed rates. The nACRo coating provides elevated heat and wear resistance, extending tool life in demanding cutting applications. With a right-hand flute direction, variable index geometry, and centercutting capability, this end mill handles slotting, profiling, and plunging in a single tool. It is installed and used by machinists and tool-and-die professionals working on CNC machining centers and manual knee mills.

This end mill is suited for precision machining of ferrous and non-ferrous metals, hardened steels, and high-temperature alloys where corner radius geometry is required to reduce stress concentrations and improve part finish. The single-end configuration makes it appropriate for production environments where tools are indexed and replaced rather than reground. Its 7/8 inch length of cut and 3 inch overall length accommodate typical cavity and contour milling depths in both prototype and production runs.

Key Features

• 7-flute design increases feed rate capability and improves surface finish on finishing passes
• 0.0200 inch corner radius reduces corner chipping and stress concentration on workpiece edges
• nACRo coating provides thermal and oxidation resistance for extended tool life in high-speed cutting
• Variable index flute spacing reduces harmonic vibration and chatter during aggressive cuts
• Centercutting geometry allows direct plunge entry without a pre-drilled hole
• Micrograin solid carbide substrate delivers rigidity and wear resistance across hard material grades

Compatibility

Designed as an OEM-style replacement or standard tooling selection for CNC machining centers and manual mills accepting a 3/8 inch shank diameter end mill holder or collet.

Installation Notes

Installation is performed by machinists using a compatible end mill holder, shrink-fit chuck, or collet rated for 3/8 inch shank tooling. Ensure the machine spindle is fully powered down and locked before loading or unloading the tool. Verify shank seating depth and runout with a dial indicator before engaging a cut. Follow machine tool manufacturer torque specifications for drawbar and collet nut tightening.