Accupro 12182833 Corner Radius End Mill 5/16 in 4 Flute

Product Description

The ACCUPRO 12182833 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining applications. It features a 5/16 inch (0.3125 inch) mill diameter with a 0.02 inch corner radius, giving cutting edges a controlled radius profile that reduces chipping and improves surface finish at workpiece corners. The 4-flute, right-hand spiral geometry with a 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. The bright/uncoated finish makes this end mill well-suited for non-ferrous metals and materials where coating adhesion is not required. Licensed machinists and CNC operators are the primary users of this tool.

This end mill is used in vertical and horizontal milling machines, CNC machining centers, and manual knee mills. The stub-length configuration with a 1/2 inch length of cut (LOC) and 2 inch overall length (OAL) provides rigidity for slotting, profiling, and peripheral milling in tight setups. The centercutting design allows plunge entry directly into workpiece material. The 5/16 inch shank diameter fits standard collets and end mill holders of the same bore size. Typical applications include finish profiling of aluminum, brass, copper, and similar non-ferrous or softer ferrous materials.

Key Features

• 0.02 inch corner radius reduces stress concentrations and edge chipping at workpiece corners
• 4-flute right-hand spiral with 40-degree helix for smooth chip flow and surface finish
• Solid micrograin carbide construction provides rigidity and wear resistance
• Centercutting geometry enables direct plunge entry without pre-drilled pilot holes
• Stub-length design (1/2 inch LOC) maximizes tool rigidity in short-reach applications
• Bright/uncoated finish suitable for non-ferrous metals and dry or light-lubrication cutting

Compatibility

Designed for use in standard 5/16 inch collets, end mill holders, and shrink-fit tooling systems on CNC machining centers and manual milling machines accepting 5/16 inch shank tooling.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill from the holder. Seat the shank to the recommended insertion depth in the collet or holder and torque the retention mechanism according to the toolholder manufacturer specifications. Verify runout with a dial indicator before commencing cuts to avoid premature tool wear or workpiece damage.