Accupro 12182878 Corner Radius End Mill 3/8 in 4 Flute

Product Description

The ACCUPRO 12182878 is a solid carbide corner radius end mill designed for precise milling operations in ferrous and non-ferrous metals, alloys, and hardened materials. It features a 3/8 inch diameter with a 0.06 inch corner radius and a 4-flute, right-hand spiral configuration that promotes efficient chip evacuation and smooth surface finishes. The micrograin carbide substrate provides edge retention and rigidity, making this tool well-suited to demanding CNC and manual milling applications. The bright/uncoated finish allows direct inspection of edge wear and suits a wide range of base materials without coating interference.

This end mill is intended for stub-length applications where rigidity and reduced deflection are priorities. The 5/8 inch length of cut and 2 inch overall length make it appropriate for shallow-to-moderate depth passes on machining centers, knee mills, and similar equipment. It is a single-end, centercutting tool, allowing plunge entry as well as conventional and climb milling paths. Machinists, tool-and-die makers, and CNC operators will find this geometry useful for adding radius transitions to inside corners in mold work, fixture fabrication, and general precision machining.

Key Features

• Solid micrograin carbide construction for superior edge retention in demanding materials
• 0.06 inch corner radius reduces stress concentrations at inside corners and extends part life
• 4-flute right-hand spiral design balances material removal rate with surface finish quality
• Centercutting capability allows direct plunge entry without a pre-drilled pilot hole
• Bright/uncoated finish compatible with a wide range of cutting fluids and work materials
• Stub length profile maximizes rigidity and minimizes deflection in tight setups

Compatibility

Designed as a standard shank end mill with a 3/8 inch shank diameter, compatible with ER collets, end mill holders, and similar toolholding systems sized for 3/8 inch shanks on CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the machine in a fully de-energized and locked-out state before tooling changes. Ensure the collet or tool holder is clean and free of chips or debris before seating the shank to the recommended engagement depth. Verify runout with a dial indicator after clamping to confirm proper seating. Follow the machine manufacturer and tooling supplier guidelines for speeds, feeds, and depth of cut appropriate to the workpiece material.