Accupro 12182874 Corner Radius End Mill 3/8 in 4 Flute

Product Description

The ACCUPRO 12182874 is a solid carbide corner radius end mill designed for precision milling operations requiring a controlled edge radius and high wear resistance. It features a 3/8 inch cutting diameter, a 0.015 inch corner radius, and four spiral flutes with a 40-degree helix angle for efficient chip evacuation and smooth surface finishes. The centercutting geometry allows direct plunging into workpiece material. With an overall length of 2 inches and a length of cut of 5/8 inch, this is a stub-length tool built for rigidity in tight setups. Machining professionals and toolroom technicians use this end mill in CNC and manual milling applications.

This end mill is suited for finishing and semi-finishing passes on ferrous and non-ferrous materials where a small corner radius is required to reduce stress concentrations at part features. The bright uncoated finish makes it appropriate for materials that react poorly with coated tools, including certain aluminum alloys and copper-based materials. The 3/8 inch shank diameter matches the cutting diameter, and the right-hand flute direction with right-hand cutting makes it compatible with standard spindle configurations. Typical applications include slot milling, profiling, and pocketing in precision part manufacturing environments.

Key Features

• 0.015 inch corner radius reduces edge chipping and stress concentrations at milled features
• Micrograin solid carbide construction provides high hardness and thermal stability
• 40-degree helix angle promotes efficient chip evacuation and reduces cutting forces
• Centercutting design allows direct plunge entry without a pre-drilled hole
• Bright uncoated finish suited for non-ferrous and reactive materials
• Stub-length body maximizes rigidity and minimizes deflection in demanding setups

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide corner radius end mill for standard 3/8 inch collet or end mill holder tooling systems in CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with end mill holder torque procedures and runout verification. Always confirm the shank is fully seated and secured in the collet or holder before spindle engagement. Inspect the corner radius condition before each use, as chipping or wear at the radius will affect part geometry. Ensure the machine spindle is fully stopped and the tool is clear of the workpiece before making any tool changes.