Accupro 12467994 Corner Radius End Mill 1/4 in 4 Flute

Product Description

The ACCUPRO 12467994 is a solid carbide corner radius end mill designed for precision milling in demanding metalworking applications. With a 1/4 inch mill diameter and a 0.0300 inch corner radius, it produces smooth, consistent edge transitions while reducing stress concentrations in the workpiece. The AlTiN coating provides high heat resistance and extended tool life at elevated cutting speeds. Four flutes with a 30-degree right-hand helix deliver efficient chip evacuation and a fine surface finish. At 2-1/2 inches overall length with a 3/4 inch length of cut, this tool suits tight-tolerance work where tool reach and rigidity are both critical. Micrograin carbide grade supports edge retention in hard and abrasive materials. Installed and operated by machinists and toolroom professionals in CNC machining centers and manual mills.

This end mill fits into the miniature series, making it well-suited for small-feature milling, contouring, and profiling in die and mold work, aerospace components, and precision medical parts. The centercutting design allows direct plunge entry, adding versatility to slotting and pocket milling operations. The single-end configuration and 1/4 inch shank diameter are standard for compact toolholders and collet chucks common in high-speed machining setups. Right-hand cutting direction is compatible with conventional CNC spindle rotation.

Key Features

• 0.0300 inch corner radius reduces edge chipping and workpiece stress concentrations
• AlTiN coating improves heat resistance and extends tool life in ferrous and hardened materials
• 4-flute spiral geometry supports higher feed rates and improved surface finish
• Centercutting design enables direct plunge milling without a pre-drilled entry hole
• Micrograin solid carbide construction maintains edge sharpness in abrasive materials
• 30-degree right-hand helix promotes efficient chip evacuation in deep pockets and slots

Compatibility

Designed as an OEM-style replacement or direct-use cutting tool for 1/4 inch collet chucks and toolholders in CNC machining centers, VMCs, and manual mills accepting standard 1/4 inch shank end mills.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with CNC or manual milling equipment. Ensure the spindle is fully stopped and the machine is powered down before loading or unloading the tool from its holder. Use a properly sized collet or end mill holder and torque to toolholder manufacturer specifications to prevent pullout. Verify runout with a dial indicator after installation before beginning a cut, especially in tight-tolerance applications.