Accupro 12180580 Corner Radius End Mill 1/2 in 4 Flute

Product Description

The ACCUPRO 12180580 is a solid carbide corner radius end mill designed for high-performance milling in demanding metal-cutting applications. Built from micrograin solid carbide and finished with an AlTiN (aluminum titanium nitride) coating, this tool handles hardened steels, stainless alloys, and heat-resistant materials with extended tool life. The 0.02 inch corner radius reduces stress concentration at the cutting edge and produces a consistent, controlled corner break on machined features. With 4 flutes, a right-hand cutting direction, and a variable index design, it delivers efficient chip evacuation and reduced chatter across a range of CNC milling operations. Licensed machinists and CNC programmers are the primary users of this tooling.

This end mill is suited for finish and semi-finish milling passes in vertical machining centers and CNC mills handling ferrous and non-ferrous metals. The centercutting geometry allows plunge entry, expanding programming flexibility. The single-end configuration and 1/2 inch shank diameter fit standard ER and side-lock toolholders common in production and job-shop environments. It is appropriate for both roughing at conservative depths and light finishing passes where corner geometry must be held to tight tolerances.

Key Features

• Micrograin solid carbide substrate for wear resistance and rigidity in hard materials
• AlTiN coating extends tool life at elevated cutting temperatures
• 0.02 inch corner radius reduces edge chipping and produces controlled corner breaks
• Variable index flute spacing reduces harmonic vibration and chatter
• Centercutting geometry permits direct plunge entry without pre-drilled entry points
• Right-hand spiral flutes promote efficient chip evacuation in standard CNC mill setups

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide corner radius end mill for standard 1/2 inch shank toolholders used in CNC vertical machining centers and milling machines.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and the control in an e-stop or tool-change state. Use a calibrated torque wrench when tightening collet nuts or side-lock set screws to avoid shank distortion. Verify runout at the tool tip with a dial indicator before production cutting, as excessive runout accelerates edge wear on carbide tooling. Follow the tooling manufacturer and machine builder guidelines for speeds and feeds based on material hardness and depth of cut.