Accupro 311262 Corner Radius End Mill 5/16 in 4 Flute

Product Description

The ACCUPRO 311262 is a single-end corner radius end mill designed for precision milling in demanding machining environments. Built from micrograin solid carbide and coated with AlCrTiN for heat and wear resistance, this tool handles high-speed cutting in hardened and abrasive materials. It features a 5/16 inch diameter, a 0.020 inch corner radius, and a 38-degree helix angle with variable index geometry. Four flutes and centercutting capability allow both plunge and peripheral milling operations. Licensed machinists and CNC programmers working in job shops, tool rooms, and production environments will find this mill suited for tight-tolerance profiling and slotting work.

This end mill is designed for use in vertical machining centers and CNC milling machines where accurate corner radius profiles and clean surface finishes are required. The right-hand flute direction and right-hand cutting direction make it compatible with standard spindle configurations. The chipbreaker geometry aids in chip evacuation during deep slotting or extended-reach passes. The 7/16 inch length of cut and 2 inch overall length position it for short-reach finishing and semi-finishing applications in ferrous and non-ferrous materials.

Key Features

• Micrograin solid carbide construction for rigidity and wear life in abrasive materials
• AlCrTiN coating provides high-temperature oxidation resistance and extended tool life
• 0.020 inch corner radius reduces stress concentration and improves edge durability
• Variable index flute spacing minimizes chatter during high-speed milling
• Centercutting design allows direct plunge entry without a pre-drilled pilot hole
• Chipbreaker geometry promotes efficient chip evacuation in slotting and pocketing operations

Compatibility

Designed as an OEM-style solid carbide corner radius end mill compatible with standard 5/16 inch collets and tool holders used in CNC vertical machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Secure the shank in a clean, properly sized collet or end mill holder to the tool holder manufacturer's specified clamping torque. Verify runout with a dial indicator before beginning the cut, and confirm that programmed speeds and feeds are appropriate for the workpiece material and depth of cut.