Accupro 12183283 Corner Radius End Mill 3/8 in 4 Flute Carbide

Product Description

The ACCUPRO 12183283 is a solid carbide corner radius end mill designed for precision milling operations requiring a controlled edge radius. Built from micrograin carbide with a bright uncoated finish, it features a 3/8-inch diameter, a 0.06-inch corner radius, and a 40-degree helix angle that promotes efficient chip evacuation and smooth cutting action. With four flutes and a right-hand cutting direction, this tool is suited for finishing and semi-finishing passes in ferrous and non-ferrous materials. It is centercutting, allowing plunge entry into the workpiece. Machinists and tool-and-die professionals specify this geometry when a sharp corner radius is needed to reduce stress concentrations in milled pockets and profiles.

This end mill fits standard CNC machining centers and manual mills equipped with a 3/8-inch collet or end mill holder. The extra-long length of cut at 1-3/4 inches and a 4-inch overall length make it suitable for deeper pockets and stepped cavities where a standard-length tool would not reach. It is commonly used in mold making, die work, and precision part machining across aerospace, automotive, and general manufacturing environments.

Key Features

• Micrograin solid carbide construction for hardness and wear resistance
• 0.06-inch corner radius reduces stress concentrations and extends tool life in milled corners
• 40-degree helix angle promotes efficient chip flow and reduces cutting forces
• Centercutting design allows direct plunge milling without a pre-drilled entry hole
• Extra-long length of cut of 1-3/4 inches reaches deep pockets and stepped features
• Bright uncoated finish suitable for use with or without cutting fluid across a range of materials

Compatibility

Designed as a direct-fit replacement for standard 3/8-inch shank end mill holders and collet systems on CNC machining centers and manual knee mills requiring a corner radius end mill geometry.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer torque and runout specifications for end mill holders. Ensure the spindle is fully stopped and the machine is in an e-stop or lockout-tagout state before changing tooling. Verify collet condition and holder cleanliness before seating the shank to maintain concentricity within acceptable runout limits. Confirm depth-of-cut and feed rate parameters are appropriate for the workpiece material before engaging the cut.