Accupro 12180634 Corner Radius End Mill 1/2 in 4 Flute Altin

Product Description

The ACCUPRO 12180634 is a solid carbide corner radius end mill designed for precision milling in demanding metal-cutting applications. It features a 1/2 inch mill diameter, a 1-1/4 inch length of cut, and a 0.06 inch corner radius that reduces stress concentration at the cutting edge and extends tool life. The 4-flute, right-hand spiral configuration with a 40-degree helix angle promotes efficient chip evacuation and smooth surface finishes. An AlTiN coating provides thermal resistance and hardness at elevated temperatures, making this tool well-suited for dry or near-dry cutting of hardened steels, stainless, and high-temperature alloys. The 1/2 inch shank fits standard ER and side-lock toolholders. Single-end, centercutting geometry allows plunge entry and full slot milling.

This end mill is used in CNC vertical and horizontal machining centers for finishing and semi-finishing operations on ferrous and non-ferrous metals. The corner radius geometry is preferred on die and mold work, aerospace components, and any application where a sharp 90-degree corner would cause premature chipping. The variable index design helps suppress chatter during aggressive side milling passes. The 3 inch overall length keeps overhang minimal, contributing to rigidity in high-feed-rate programs. Machinists and tool-and-die professionals working in job shops, production shops, and maintenance environments will find this tool appropriate for a wide range of contouring and profiling tasks.

Key Features

• 0.06 inch corner radius reduces edge chipping and extends tool life versus square-end geometry
• AlTiN coating provides high thermal resistance for dry and hard milling applications
• 4-flute, right-hand spiral with 40-degree helix angle for efficient chip evacuation and surface finish
• Centercutting design permits plunge milling and slot entry without a pre-drilled hole
• Variable index flute spacing reduces harmonic chatter during high-feed side milling
• Micrograin solid carbide substrate for hardness and dimensional stability

Compatibility

Designed as an OEM-style replacement or direct-fit tooling option for CNC machining centers accepting 1/2 inch shank end mills in standard ER collet chucks, hydraulic holders, and side-lock toolholders.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine in a locked-out, de-energized state per applicable safety procedures. Ensure the shank is fully seated to the recommended gauge line depth in the toolholder and that the holder is torqued per the toolholder manufacturer's specification. Inspect the corner radius and cutting edges for chips or coating damage before each use. Do not exceed the tool manufacturer's recommended speeds and feeds for the workpiece material and coating type.