Accupro 12182853 Corner Radius End Mill 5/16 in 4 Flute

Product Description

The ACCUPRO 12182853 is a single-end corner radius end mill manufactured from micrograin solid carbide and finished with an AlTiN (aluminum titanium nitride) coating. It carries a 5/16 inch (0.3125 inch) cutting diameter, a 0.045 inch corner radius, and a 1/2 inch length of cut, with a 2 inch overall length and a matching 5/16 inch shank diameter. The 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. With four right-hand spiral flutes and centercutting capability, this tool handles slotting, profiling, and plunge operations in ferrous and hardened materials. It is sized in the stub-length category, offering added rigidity for precision work in tight setups.

This end mill is suited for machining operations in job shops, tool rooms, and production environments where close-tolerance corner radii are required. The AlTiN coating provides thermal resistance during high-speed and dry cutting applications, making it appropriate for use in hardened steels, stainless steels, and cast iron. The stub length configuration reduces deflection in interrupted cuts and deep-pocket work. Machinists running CNC mills or manual knee mills use this style of tool for die and mold work, part profiling, and blend radii on finished components.

Key Features

• Micrograin solid carbide construction for hardness and wear resistance
• AlTiN coating for high-temperature performance in dry or minimal-lubrication cutting
• 0.045 inch corner radius reduces stress concentration at part corners
• 40-degree helix angle supports efficient chip evacuation and reduced cutting forces
• Centercutting design allows direct plunge entry into workpiece
• Stub-length geometry provides increased rigidity and reduced deflection

Compatibility

Designed as an OEM-style replacement or direct-use cutting tool for CNC machining centers and manual milling machines accepting a 5/16 inch straight shank.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the spindle is fully stopped and power is locked out before changing tooling. Use a proper collet or end mill holder rated for the 5/16 inch shank diameter and torque the retention mechanism to the machine manufacturer's specification. Verify runout after installation before beginning a cut; excessive runout accelerates edge wear and compromises corner radius tolerance.