Accupro 12181387 Corner Radius End Mill 5/16 in 2 Flute Altin

Product Description

The ACCUPRO 12181387 is a solid carbide corner radius end mill designed for precision milling operations in metal fabrication and machining environments. It features a 5/16 inch diameter with a 0.0600 inch corner radius, delivering a controlled blend between the flank and end face to reduce stress concentration and extend tool life at corners. The 2-flute, right-hand spiral geometry with a 40-degree helix angle promotes efficient chip evacuation and smooth cutting performance. An AlTiN coating provides thermal resistance and hardness at elevated temperatures, making this tool well-suited for ferrous and hardened materials. Machinists and CNC operators working in job shops or production environments are the primary users of this tool.

This end mill is used in vertical and horizontal CNC machining centers as well as manual knee mills for slotting, profiling, and peripheral milling operations. The centercutting design allows it to plunge directly into the workpiece, enabling versatile toolpath strategies. Its 3/4 inch length of cut and 2-1/2 inch overall length make it appropriate for light-to-moderate depth applications in steel, stainless steel, cast iron, and similar materials where a radiused corner is required for part geometry or to reduce corner chipping.

Key Features

• AlTiN coating provides high-temperature hardness and oxidation resistance for ferrous and hardened material milling
• 0.0600 inch corner radius reduces stress concentration and extends corner life in profiling cuts
• 40-degree helix angle with right-hand spiral flutes promotes efficient chip evacuation
• Centercutting geometry allows direct plunge entry without pre-drilled pilot holes
• Micrograin solid carbide construction delivers rigidity and wear resistance
• Single-end design with 5/16 inch shank diameter for standard ER collet or end mill holder fitment

Compatibility

Designed as an OEM-style solid carbide corner radius end mill suitable for use in standard ER collet chucks, shrink-fit holders, or end mill holders accepting a 5/16 inch shank diameter.

Installation Notes

This tool is installed and operated by machinists and CNC technicians following standard toolholding procedures for solid carbide end mills. Always ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Confirm holder bore cleanliness and proper collet or chuck torque per the toolholder manufacturer specification before running. Do not exceed the tool's rated depth of cut or feed rates for the workpiece material grade being machined.