Accupro 311473 Corner Radius End Mill 1/4 in 5 Flute Carbide

Product Description

The ACCUPRO 311473 is a solid carbide corner radius end mill designed for high-performance milling in demanding machining environments. Built to Series HS standards, it features a 1/4 inch cutting diameter, a 1-1/4 inch length of cut, and a 3 inch overall length. The tool carries an AlCrTiN coating for elevated heat and wear resistance, making it well-suited for cutting harder workpiece materials at higher speeds. With five flutes and a variable index design, it delivers improved chip evacuation and reduced chatter during full-depth passes. Center-cutting capability allows direct plunge entry without a pre-drilled pilot hole.

This end mill is intended for use in CNC machining centers and manual mills where corner radius profiling, contouring, and slotting operations are required. The 0.060 inch corner radius helps reduce stress concentration at the cutting edge and produces a blended radius on inside corners. The 38-degree helix angle promotes smooth cutting action and efficient chip removal. It is a single-end tool with a 1/4 inch straight shank, compatible with standard collet chucks and end mill holders. Machinists working in tool and die, mold making, aerospace components, and general precision machining will find this geometry practical for finishing and semi-finishing passes.

Key Features

• AlCrTiN coating for high-temperature wear resistance in harder materials
• 5-flute design with variable index for reduced vibration and improved surface finish
• 0.060 inch corner radius for blended inside corners and reduced edge chipping
• Center-cutting construction allows direct plunge milling without pilot holes
• Right-hand cut and right-hand flute spiral for standard CNC spindle compatibility
• Micrograin solid carbide substrate for rigidity and edge retention

Compatibility

Designed as a direct-fit replacement or standard tooling selection for 1/4 inch collet chucks, ER collet systems, and end mill holders accepting a 1/4 inch shank diameter in CNC machining and manual milling applications.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Power down and lock out the spindle before inserting or removing the tool from the holder. Ensure the collet or holder is clean and free of debris before seating the shank to the recommended engagement depth. Consult the machine tool manufacturer and cutting tool data for appropriate speeds, feeds, and depth-of-cut parameters before running the tool.