Accupro 12180640 Corner Radius End Mill 5/8 in 4 Flute

Product Description

The ACCUPRO 12180640 is a solid carbide corner radius end mill designed for precision milling of ferrous and non-ferrous materials in demanding machining environments. The 5/8-inch diameter cutting tool features a 0.06-inch corner radius, 4 flutes, and a 40-degree helix angle that promotes smooth chip evacuation and stable cutting action. An AlTiN coating provides thermal resistance and extended tool life at elevated cutting speeds. The 1-1/4-inch length of cut and 3-1/2-inch overall length make it suitable for a range of peripheral and slot milling operations. Micrograin carbide construction contributes to edge retention across high-cycle production runs.

This end mill is intended for use in CNC machining centers and manual mills where a radiused corner profile is required to reduce stress concentrations in milled pockets, slots, and contour features. It is well suited for mold and die work, aerospace components, and general precision machining where corner breakout must be controlled. The single-end, center-cutting design allows plunge entry as well as conventional end milling. Variable index flute spacing reduces chatter during interrupted cuts or when working with tighter tolerances.

Key Features

• 0.06-inch corner radius reduces stress risers in milled features and extends part fatigue life
• AlTiN coating provides high heat resistance for dry or semi-dry cutting at elevated speeds
• 40-degree helix angle promotes efficient chip evacuation and smooth surface finish
• Variable index flute geometry reduces harmonic chatter during cutting
• Center-cutting design permits direct plunge entry without a pre-drilled pilot hole
• Micrograin solid carbide substrate delivers superior edge retention and dimensional stability

Compatibility

Designed as an OEM-style replacement and general-use corner radius end mill compatible with standard 5/8-inch collets, end mill holders, and hydraulic chucks used in CNC machining centers and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the 5/8-inch shank fully into the holder and torque the retention mechanism according to the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning production cuts, as excessive runout will accelerate corner radius wear and degrade surface finish.