Accupro 310307 Corner Radius End Mill 1/2 in 4 Flute

Product Description

The ACCUPRO 310307 is a solid carbide corner radius end mill designed for precision milling operations where a controlled edge radius and superior wear resistance are required. It features a 1/2 inch diameter, a 1-1/4 inch length of cut, and a 3 inch overall length with a 38-degree helix angle. The 4-flute, right-hand spiral geometry with variable index and AlCrTiN coating makes this tool well-suited for high-speed cutting in hardened steels, stainless, and other difficult-to-machine alloys. Centercutting capability allows for direct plunge entry. This end mill is installed and operated by machinists and CNC programmers in job shop, tool and die, and production machining environments.

The 310307 is appropriate for milling applications in ferrous and non-ferrous materials where a corner radius is needed to reduce stress concentration and improve surface finish at the base of a feature. The straight-cylindrical shank accepts standard ER or shrink-fit toolholders with a 1/2 inch bore. Its micrograin carbide substrate and AlCrTiN coating support dry cutting and high-speed machining strategies, reducing the need for flood coolant in many applications. Single-end configuration means the tool is replaced as a unit once worn.

Key Features

• Solid micrograin carbide substrate for edge toughness and rigidity in demanding cuts
• AlCrTiN coating provides high-temperature oxidation resistance for dry and hard milling
• 4-flute variable index geometry reduces harmonic chatter during side milling passes
• 38-degree helix angle improves chip evacuation and surface finish
• Centercutting design allows direct plunge and ramp-entry tool paths
• Corner radius of 0.060 inches reduces edge chipping and stress concentration at part fillets

Compatibility

Designed as a direct-fit replacement for applications requiring a 1/2 inch diameter, single-end corner radius end mill with a straight-cylindrical shank, compatible with standard 1/2 inch ER collet chucks, milling chucks, and shrink-fit holders.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician with the spindle fully stopped and locked out before changing tooling. Ensure the shank is clean and the toolholder bore is free of chips or runout before clamping. Follow toolholder manufacturer torque guidelines for collet nut tightening. Verify runout at the cutting edge with a dial indicator before beginning a production run to protect both the tool and the workpiece.