Accupro 312082 Corner Radius End Mill 1/4 in 5 Flute Carbide

Product Description

The ACCUPRO 312082 is a solid carbide corner radius end mill designed for precision milling in demanding production environments. It carries a 1/4 inch diameter, a 0.030 inch corner radius, and an AlCrTiN coating that extends tool life in high-heat, abrasive cutting conditions. The 5-flute, right-hand spiral geometry with a 38-degree helix angle promotes efficient chip evacuation and smooth surface finishes. The extended reach design accommodates deeper cavities and features a reduced neck diameter of 0.237 inches for clearance in tight workpiece geometries. This end mill is a centercutting single-end tool, appropriate for machinists and CNC operators working in tool and die, mold making, aerospace component machining, and general metalworking.

This end mill is suited for use in CNC machining centers and manual mills requiring a long-reach, corner radius profile tool. The 3/8 inch length of cut, 3/4 inch reach length, and 4 inch overall length make it well-matched for cavity milling, profiling, and finishing operations where standard-length end mills lack adequate reach. It is intended for cutting ferrous and non-ferrous materials where AlCrTiN coatings provide thermal and oxidation resistance. Variable index fluting reduces chatter and harmonic vibration during side milling passes. Installation and use require a compatible 1/4 inch collet or end mill holder.

Key Features

• AlCrTiN coating provides high-temperature resistance and extended tool life in abrasive materials
• 5-flute variable index geometry reduces chatter and improves surface finish quality
• Extended reach with 0.237 inch neck diameter allows access to deep pockets and tight cavity walls
• 0.030 inch corner radius reduces stress concentration at the cutting edge and improves workpiece corner geometry
• 38-degree helix angle promotes efficient chip evacuation during aggressive side milling
• Micrograin solid carbide construction delivers rigidity and wear resistance across a broad range of materials

Compatibility

Designed for use in CNC machining centers and manual mills with a 1/4 inch collet or end mill holder. Fits standard 1/4 inch shank tool holders commonly used in production and job shop environments.

Installation Notes

This tool is installed by a machinist or CNC operator using a 1/4 inch precision collet or shrink-fit end mill holder. Ensure the machine spindle is fully stopped and locked out before installing or removing the end mill. Verify runout at the tool tip before beginning the cut, as extended-reach tools are sensitive to holder concentricity. Do not exceed the manufacturer-rated depth of cut for the listed length of cut and neck diameter combination.