Accupro 12181380 Corner Radius End Mill 5/16in 2 Flute Ticn

Product Description

The ACCUPRO 12181380 is a single-end, centercutting corner radius end mill ground from micrograin solid carbide and finished with a TiCN (titanium carbonitride) coating. It carries a 5/16-inch diameter, a 0.09-inch corner radius, and a 3/4-inch length of cut, making it suited for milling operations that require a controlled edge radius to reduce stress concentration and extend workpiece life. The TiCN coating adds surface hardness and lubricity for improved tool life in ferrous and hardened materials. This tool is intended for use by machinists and tool-and-die professionals on CNC machining centers and manual mills.

This end mill is designed for profiling, slotting, and contouring operations in ferrous metals, hardened steels, and similar materials where a corner radius geometry is required. The 2-flute configuration allows for adequate chip evacuation in moderate-to-aggressive cuts. With a 2-1/2-inch overall length and a 5/16-inch shank diameter matching the cutter diameter, it fits standard collet and end mill holders common in both production and job-shop environments. It is a single-end tool, so it is replaced rather than reversed when worn.

Key Features

• Micrograin solid carbide substrate for rigidity and wear resistance
• TiCN coating improves surface hardness and reduces friction in ferrous materials
• 0.09-inch corner radius reduces stress risers and improves corner finish
• Centercutting design allows plunge milling entry
• Right-hand cut, right-hand spiral flute direction
• 40-degree helix angle promotes smooth chip flow and reduced cutting forces

Compatibility

Designed as an OEM-style replacement or direct-use corner radius end mill for standard 5/16-inch collet chucks, shrink-fit holders, and end mill holders used in CNC and manual milling applications.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's tooling guidelines. Secure the shank fully within the collet or holder to the minimum insertion depth recommended for the holder type, and verify runout before cutting. Always power down and lock out the spindle before changing tooling. Observe applicable shop safety standards for rotating cutting tools, including proper guarding and chip containment.