Accupro 12181376 Corner Radius End Mill 5/16 in 2 Flute Ticn

Product Description

The ACCUPRO 12181376 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and non-ferrous materials. It carries a 0.02 inch corner radius and a 5/16 inch mill diameter with a 3/4 inch length of cut. The TiCN coating increases surface hardness and reduces friction, extending tool life in demanding cutting environments. With a 40-degree helix angle and right-hand spiral flutes, this two-flute design promotes efficient chip evacuation and smooth cutting action. Machinists and CNC operators install this tool in standard end mill holders or collet chucks for finishing and semi-finishing passes.

This end mill is suited for use on CNC machining centers and manual knee mills where a corner radius profile is required to reduce stress concentrations at part corners or produce filleted internal features. The centercutting geometry allows plunge cutting as well as conventional peripheral milling. The 5/16 inch shank matches the mill diameter, keeping setup straightforward on machines with standard collet sizes in that range. It is a single-end tool intended for production or job-shop environments where close-tolerance corner radii are specified on part prints.

Key Features

• 0.02 inch corner radius with a tolerance of plus or minus 0.0015 inches for consistent profile accuracy
• TiCN coating for increased wear resistance and reduced built-up edge in ferrous materials
• 40-degree helix angle promotes smooth cutting action and efficient chip removal
• Centercutting design allows direct plunge entry without a pre-drilled pilot hole
• Micrograin solid carbide substrate for rigidity and resistance to deflection in fine-pitch cuts
• Right-hand cut and right-hand flute spiral for compatibility with standard spindle rotation

Compatibility

Designed as a direct-fit replacement or standard tooling selection for CNC machining centers and manual mills accepting a 5/16 inch shank diameter end mill.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the spindle before inserting or removing the tool from the holder. Seat the shank fully in the collet or end mill holder to the recommended grip length before torquing the retention nut. Inspect the shank and collet bore for chips or damage before each use to prevent runout that can affect corner radius tolerance.