Accupro 14556380 Corner Radius End Mill 1/4 in 4 Flute

Product Description

The ACCUPRO 14556380 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and hardened materials. It features a 1/4 inch cutting diameter, a 0.06 inch corner radius, and four right-hand spiral flutes with a 40-degree helix angle. The AlTiN+ coating provides thermal resistance and extended tool life in high-speed applications. At 2.5 inches overall length with a 3/4 inch length of cut, this is a single-end, centercutting tool built for slotting, profiling, and finishing passes where edge integrity and tight radius tolerances are required. It is sold individually and suits CNC machining centers and manual mills alike.

This end mill is suited for shops running ferrous alloys, stainless steels, and hardened materials where a corner radius profile is needed to reduce stress concentrations at the base of a feature. The regular-length geometry and straight cylindrical 1/4 inch shank make it compatible with standard collet chucks and end mill holders. Typical applications include die and mold work, aerospace component finishing, and general precision part machining where a sharp corner is not permissible.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance in hard materials
• AlTiN+ coating for elevated thermal performance and extended tool life in dry or semi-dry cutting
• 0.06 inch corner radius with a tolerance of plus or minus 0.001 inch for consistent radius profiles
• Centercutting design allows direct plunge entry into workpiece material
• 40-degree helix angle promotes smooth chip evacuation and reduced cutting forces
• Right-hand cut, right-hand flute spiral for standard spindle rotation compatibility

Compatibility

Designed for use in standard 1/4 inch collet chucks, ER collet holders, and end mill holders on CNC machining centers and manual mills. No specific OEM or machine model compatibility was stated in the product data.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is powered down or in a safe state before changing tooling. Seat the shank fully into the collet or holder to the manufacturer-recommended grip length before torquing the retention nut. Verify runout with a dial indicator after installation, as excessive runout will accelerate wear and degrade the corner radius profile.