Accupro 12182497 Corner Radius End Mill 5/16 in 4 Flute

Product Description

The ACCUPRO 12182497 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining environments. With a 5/16-inch diameter and a 0.010-inch corner radius, it produces smooth, radiused transitions at the base of milled features, reducing stress concentrations and improving surface finish. The four-flute, right-hand spiral design balances chip evacuation with surface quality. A TiCN coating increases surface hardness and lubricity, extending tool life in ferrous and non-ferrous materials. This tool is used by machinists and tool-and-die professionals operating CNC milling centers and manual knee mills.

This end mill suits precision die work, mold making, and general profiling where a small corner radius is specified. The centercutting geometry allows plunge entry without a pre-drilled hole, adding versatility in 3-axis and multi-axis CNC applications. It is suited for operations requiring consistent, repeatable corner geometry in steel, stainless, aluminum, and similar materials where a micrograin carbide substrate and TiCN coating provide reliable performance.

Key Features

• 0.010-inch corner radius reduces stress risers at milled floor-to-wall transitions
• TiCN coating improves wear resistance and surface lubricity for extended tool life
• Micrograin solid carbide substrate provides rigidity and edge retention
• Centercutting design allows direct plunge entry without a pilot hole
• Right-hand cut, right-hand spiral flutes for standard CNC spindle compatibility
• Single-end configuration with 5/16-inch shank for standard collet or end mill holder fitment

Compatibility

Designed for use in standard 5/16-inch collets, end mill holders, or shrink-fit toolholders on CNC milling machines and manual mills requiring a corner radius end mill with a 5/16-inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and locked out before changing tooling. Seat the shank fully and evenly in the collet or holder to the minimum engagement depth recommended by the toolholder manufacturer. Verify runout with a dial indicator before beginning a cut, as excessive runout accelerates edge wear and reduces corner radius accuracy.