Accupro 14556377 Corner Radius End Mill 1/4 in 4 Flute

Product Description

The ACCUPRO 14556377 is a solid carbide corner radius end mill designed for precision milling in demanding metalworking applications. It features a 1/4 inch diameter with a 0.015 inch corner radius and a 3/4 inch length of cut, making it well-suited for finishing passes where edge integrity and surface quality matter. The AlTiN+ coating provides elevated heat resistance and wear protection at high cutting speeds. With 4 flutes and a right-hand spiral flute geometry, this single-end tool removes material efficiently while maintaining tight tolerances. Machinists and tool-and-die professionals working with ferrous and hardened materials will recognize this as a production-grade option in ACCUPRO's Series 6/44 lineup.

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 reduce stress concentrations or meet part geometry specifications. It is appropriate for use on steels, alloy steels, cast iron, and similar hard materials where an AlTiN+ coated carbide tool provides a performance advantage. The centercutting design allows for plunge entry, adding flexibility in programming and fixturing. It is a common choice in job shops, tool rooms, and production machining environments handling precision components.

Key Features

• 0.015 inch corner radius reduces stress risers and meets radiused-corner part specifications
• AlTiN+ coating delivers heat resistance and extended tool life in high-speed ferrous cutting
• Solid micrograin carbide construction provides rigidity and dimensional stability
• 4-flute right-hand spiral geometry balances chip evacuation with surface finish quality
• Centercutting design enables plunge milling without a pre-drilled entry hole
• Straight-cylindrical 1/4 inch shank fits standard ER and set-screw toolholders

Compatibility

Designed as an OEM-style replacement and production cutting tool for CNC machining centers and manual milling machines accepting a 1/4 inch straight-cylindrical shank.

Installation Notes

This end mill is installed and serviced by machinists in tool rooms and CNC production environments. Secure the shank fully into the toolholder to the recommended engagement depth before tightening to prevent pullout under cutting loads. Verify runout at the cutting edge after installation, as excessive runout accelerates corner radius wear and degrades surface finish. Always confirm spindle and axis feeds are at a complete stop before measuring, adjusting, or removing the tool.