Accupro 12181367 Corner Radius End Mill 5/16in 2 Flute Carbide

Product Description

The ACCUPRO 12181367 is a solid carbide corner radius end mill designed for precision milling operations in metal and composite materials. It features a 5/16 inch cutting diameter and a 0.015 inch corner radius that reduces stress concentrations at the bottom of milled slots and pockets, extending tool life and improving surface finish. With 2 right-hand spiral flutes and a 40-degree helix angle, it provides efficient chip evacuation and smooth cutting action. The bright uncoated finish makes it suitable for general-purpose applications where coating is not required. Machinists and toolroom operators install this single-end centercutting tool in CNC machining centers and manual mills.

This end mill is used in job shop, production, and toolroom environments for slotting, profiling, and pocketing operations where a corner radius is specified by the part print. The centercutting design allows direct plunge entry into the workpiece without a pre-drilled hole. The 5/16 inch shank diameter fits standard collets and end mill holders used on vertical machining centers and knee mills. Applications include finishing floors and walls of pockets where sharp corners must be avoided to reduce stress risers in the finished part.

Key Features

• 0.015 inch corner radius reduces corner stress and improves part finish at pocket floors and walls
• Solid micrograin carbide construction provides rigidity and wear resistance over high-speed steel alternatives
• 2-flute design promotes chip clearance in slotting and full-width cuts
• 40-degree helix angle supports smooth cutting and reduced chatter
• Centercutting geometry allows direct plunge milling without pilot hole
• Bright uncoated finish suitable for a wide range of general-purpose machining applications

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC machining centers and manual vertical mills accepting a 5/16 inch shank end mill holder or collet.

Installation Notes

Installation is performed by qualified machinists or CNC operators. The machine spindle must be fully stopped and locked out before changing tooling. Seat the shank fully into the collet or end mill holder to the minimum recommended engagement depth and torque the retention hardware per the machine tool manufacturer specifications. Inspect the corner radius and cutting edges for chips or damage before use, and verify runout at the cutting diameter with a dial indicator after tool installation.