Accupro 12182933 Corner Radius End Mill 1/2 in 4 Flute Carbide

Product Description

The ACCUPRO 12182933 is a single-end corner radius end mill designed for precision milling in ferrous and non-ferrous materials. Built from micrograin solid carbide, it delivers consistent edge retention and dimensional accuracy across high-demand cutting operations. The tool features a 0.03 inch corner radius that reduces stress concentration at the cutting edge and produces a small, controlled radius on inside corners. With a 40-degree helix angle and 4 spiral flutes with right-hand cutting direction, it generates efficient chip evacuation and smooth surface finishes. This end mill is centercutting, allowing it to plunge directly into the workpiece without a pre-drilled pilot hole.

This end mill suits general-purpose CNC milling and manual mill operations in machine shops, tool rooms, and manufacturing environments. The stub-length configuration provides rigidity in tight setups and short-reach applications. It is well suited for profiling, slotting, and contouring operations where a precise corner radius is required. The bright, uncoated finish makes it a practical choice for aluminum, brass, plastics, and some steels where coating adhesion is not a concern and re-sharpening may be needed.

Key Features

• Micrograin solid carbide construction for superior hardness and wear resistance
• 0.03 inch corner radius reduces edge chipping and workpiece stress risers
• 40-degree helix angle promotes smooth chip flow and reduced cutting forces
• Centercutting design enables direct plunge entry without a pilot hole
• Right-hand flute direction and right-hand cutting for standard CNC spindle use
• Stub-length body maximizes rigidity in short-reach and close-tolerance setups

Compatibility

Designed as a standard 1/2 inch shank end mill compatible with ER collet chucks, end mill holders, and milling machine spindles accepting a 1/2 inch straight shank.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and the control in an e-stop or tool-change safe state. Seat the shank fully into the collet or holder and torque the retention nut to the toolholder specification before resuming operations. Inspect the shank and flutes for chips or damage before each use. This tool should be handled and installed by qualified machinists or CNC operators familiar with safe tool-change procedures.