Accupro 12182554 Corner Radius End Mill 3/8 in 4 Flute Altin

Product Description

The ACCUPRO 12182554 is a solid carbide corner radius end mill designed for precision milling operations in metal and hard-material applications. It features a 3/8-inch mill diameter, a 7/8-inch length of cut, and a 0.06-inch corner radius that reduces stress concentration at the cutting edge and extends tool life in demanding cuts. The 4-flute, right-hand spiral geometry with a 40-degree helix angle promotes efficient chip evacuation and smooth surface finishes. An AlTiN coating adds oxidation resistance and hardness at elevated temperatures, making this end mill well suited for dry or high-speed machining environments. Machinists and CNC operators install this tool in standard end mill holders or collet chucks.

This end mill is used in CNC machining centers and manual mills for profiling, slotting, and contouring operations where a radiused corner is required to strengthen part geometry or meet drawing callouts. The centercutting design allows plunge entry, giving operators flexibility in toolpaths. The 3/8-inch shank diameter fits common ER and straight-bore collet systems. It is primarily used in job shop, tool-and-die, and production machining environments where tight tolerances and controlled corner geometry are required.

Key Features

• 0.06-inch corner radius reduces edge chipping and stress risers on finished parts
• AlTiN coating provides heat resistance for high-speed and dry machining
• 40-degree helix angle promotes smooth chip flow and reduces cutting forces
• Centercutting geometry allows direct plunge entry without pre-drilling
• Micrograin solid carbide substrate for rigidity and edge retention
• Right-hand cut and right-hand flute direction for standard spindle operation

Compatibility

Designed as a standard 3/8-inch shank corner radius end mill compatible with ER collet chucks, straight-bore tool holders, and similar end mill holding systems used in CNC and manual milling machines.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. The tool shank must be clean and seated fully in the holder before tightening to the manufacturer-specified torque for the collet or chuck style in use. Verify spindle direction is set to right-hand rotation before initiating a cut. Inspect the cutting edges and coating for chips or wear before each use, and do not exceed the recommended depth-of-cut or feed rate for the workpiece material.