Accupro 12183281 Corner Radius End Mill 3/8 in 4 Flute Carbide

Product Description

The ACCUPRO 12183281 is a solid carbide corner radius end mill designed for precision milling operations requiring a controlled edge radius and tight tolerances. Built from micrograin carbide in a bright/uncoated finish, this single-end, centercutting tool features 4 spiral flutes with a 40-degree helix angle for efficient chip evacuation. The 3/8 inch mill diameter and 0.03 inch corner radius work together to produce smooth, repeatable profiles in ferrous and non-ferrous materials. The extra-long length of cut at 1-3/4 inches makes it well suited for deeper cavity and profile work where standard-length tools fall short.

This end mill is used in CNC machining centers and manual knee mills for contour milling, profiling, and slotting operations in die and mold work, fixture fabrication, and general precision part production. The right-hand cutting direction and right-hand flute spiral are standard for conventional and climb milling on most vertical milling setups. The 3/8 inch shank diameter fits standard ER and end mill holders commonly found in production and job shop environments.

Key Features

• Micrograin solid carbide construction for hardness and wear resistance
• 0.03 inch corner radius reduces stress concentration and extends tool life at part edges
• 4 spiral flutes with 40-degree helix angle for smooth cutting action and chip evacuation
• Centercutting design allows direct plunge entry into workpiece material
• Extra-long 1-3/4 inch length of cut suits deeper cavity and profile milling applications
• Bright/uncoated finish compatible with a wide range of cutting fluids and materials

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide end mill for CNC machining centers and manual mills accepting a 3/8 inch shank diameter end mill holder or collet chuck.

Installation Notes

Installation is performed by a machinist or CNC operator. Ensure the spindle is fully stopped and the machine is powered down or in an e-stop state before loading or changing tooling. Seat the shank fully into the tool holder to the minimum insertion depth recommended by the holder manufacturer, and torque the retention nut or set screw per the holder specification. Verify runout at the tool tip with a dial indicator before initiating a cut, particularly given the tight mill diameter tolerance of +0.000000 to -0.002500 inches.