Accupro 311570 Corner Radius End Mill 3/8 in 5 Flute

Product Description

The ACCUPRO 311570 is a solid carbide corner radius end mill designed for high-performance milling operations in metalworking and machining environments. It features a 3/8 inch diameter, a 1-1/4 inch length of cut, and a 3 inch overall length, making it suited for medium-depth profiling and finishing passes. The tool carries an AlCrTiN coating that improves heat resistance and extends tool life in demanding cutting conditions. With 5 flutes and a variable index geometry, it maintains surface finish quality while managing chip evacuation. Centercutting capability allows plunge entry without a pre-drilled hole. Installed and changed out by machinists and CNC operators in job shop and production environments.

This end mill is used in CNC machining centers and manual mills for profiling, contouring, and finishing operations on ferrous and hardened materials. The corner radius end type reduces stress concentration at the cutting edge compared to a sharp corner, extending tool life in slotting and side milling applications. The right-hand flute direction and right-hand cutting orientation are standard for conventional vertical and horizontal milling setups. The 38 degree helix angle promotes smooth cutting action and efficient chip flow, particularly in harder alloy steels and stainless grades.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance
• AlCrTiN coating provides thermal protection and reduces built-up edge
• 5-flute design increases feed rates and improves finish quality
• Variable index flute spacing reduces harmonic chatter during cuts
• Corner radius end type at 0.06 inches radius protects cutting edge and part corner geometry
• Centercutting capable — supports direct plunge entry

Compatibility

Designed as an OEM-style replacement end mill for use in standard 3/8 inch collets, ER collet chucks, and end mill holders on CNC machining centers and manual mills.

Installation Notes

Installation is performed by a machinist or CNC operator. Ensure the machine spindle is fully stopped and power is off before changing tooling. Seat the shank fully into the collet or tool holder and torque the retention nut according to the tool holder manufacturer specifications. Inspect the collet for wear before use, as a worn collet can compromise runout and reduce tool life.