Accupro 12183282 Corner Radius End Mill 3/8 in 4 Flute Carbide

Product Description

The ACCUPRO 12183282 is a solid carbide corner radius end mill designed for precision milling operations where edge blending, contouring, and slotting with a radiused corner are required. Built from micrograin solid carbide with a bright/uncoated finish, it features a 3/8 inch diameter, a 0.045 inch corner radius, and a 40-degree helix angle. The 4-flute, right-hand spiral geometry provides smooth chip evacuation and surface finish quality. With an extra-long 1-3/4 inch length of cut and a 4 inch overall length, this end mill suits deeper pocketing and profiling passes where standard-reach tooling falls short. It is a single-end, centercutting tool, meaning it can be plunged directly into material.

This end mill is used in CNC machining centers and manual mills for cutting ferrous and non-ferrous materials where a controlled corner radius is required to reduce stress concentration in part geometry. The extra-long reach makes it well suited for deep cavity work, mold and die applications, and stepped-feature profiling. The micrograin carbide substrate supports higher cutting speeds and maintains edge integrity across demanding materials. Machinists, tooling shops, and precision fabrication operations are the primary users of this tooling.

Key Features

• Solid micrograin carbide construction for rigidity and edge retention at elevated cutting speeds
• 0.045 inch corner radius reduces stress risers and improves surface finish at part corners
• 40-degree helix angle promotes efficient chip evacuation and smooth cutting action
• 4-flute, right-hand spiral geometry for stable milling in slotting, profiling, and contouring operations
• Centercutting design allows direct plunge entry without pre-drilling
• Extra-long 1-3/4 inch length of cut accommodates deep pocket and cavity work

Compatibility

Designed as a direct-fit replacement or standard tooling selection for CNC machining centers and manual mills using a 3/8 inch collet or end mill holder. No specific machine model compatibility was provided in the product data.

Installation Notes

Installation is performed by qualified machinists or CNC tooling setters. Ensure the machine spindle is fully powered down and the tool changer is in a safe state before loading or removing tooling. Secure the 3/8 inch shank in a matched collet or end mill holder to the manufacturer-specified clamping torque for that holder type. Verify runout with a dial indicator after installation before initiating a cut, particularly given the extended reach of this tool.