Accupro 310273 Corner Radius End Mill 1/2 in 4 Flute Carbide

Product Description

The ACCUPRO 310273 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and hard materials. It features a 1/2 inch diameter with a 0.060 inch corner radius and carries an AlCrTiN coating that improves heat and wear resistance at elevated cutting speeds. The 4-flute, right-hand spiral configuration with a 38-degree variable index helix promotes efficient chip evacuation and surface finish quality. Overall length is 2.5 inches with a 5/8 inch length of cut. Centercutting geometry allows plunge entry. Machinists and CNC operators working in job shops, tool rooms, and production environments are the primary users of this tool.

This end mill is suited for finish and semi-finish milling passes on hardened steels, stainless alloys, and other demanding workpiece materials where edge toughness and coating performance are critical. The corner radius end geometry reduces chipping at the cutting edge compared to sharp-corner tools, making it a practical choice for profiling, slotting, and contour passes where corner breakdown is a common failure mode. The straight cylindrical shank accepts standard 1/2 inch collet chucks and end mill holders.

Key Features

• AlCrTiN coating for improved thermal resistance and extended tool life in hard materials
• Solid micrograin carbide substrate for rigidity and edge integrity
• 0.060 inch corner radius reduces edge chipping during profiling and contouring
• Variable index 4-flute design reduces harmonic vibration during cutting
• Centercutting geometry allows direct plunge entry without pre-drilling
• Right-hand cut and right-hand flute spiral for standard CNC spindle compatibility

Compatibility

Designed as a direct-fit replacement or upgrade tool for standard 1/2 inch straight cylindrical collet chucks and end mill holders used in CNC machining centers and manual mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and locked out before installing or removing the tool. Seat the shank fully in the holder to the recommended gauge line depth and torque the collet nut or set screw per the toolholder manufacturer specifications. Verify runout with a dial indicator before commencing cuts.