Accupro 12182491 Corner Radius End Mill 5/16 in 4 Flute Carbide

Product Description

The ACCUPRO 12182491 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining environments. It features a 5/16-inch diameter with a 0.02-inch corner radius and a 40-degree helix angle, making it well suited for producing clean corner profiles and reducing chipping along part edges. The 4-flute geometry provides a good balance of chip evacuation and surface finish. With a micrograin carbide construction and bright/uncoated finish, this end mill delivers consistent performance on a range of workpiece materials. It is installed and operated by machinists and CNC programmers in shop environments.

This end mill is used in vertical machining centers, CNC mills, and manual knee mills for profiling, slotting, and finishing passes where a defined corner radius is required. The centercutting design allows for plunge entry, and the single-end configuration is standard for toolholders with straight-shank retention. The 5/16-inch shank diameter matches the cutter diameter, simplifying toolholder selection. It is appropriate for light to medium-duty cutting operations on ferrous and non-ferrous materials where tight dimensional tolerances are maintained.

Key Features

• Solid micrograin carbide construction for rigidity and edge retention
• 0.02-inch corner radius reduces stress concentration and part edge chipping
• 40-degree helix angle promotes smooth cutting action and improved surface finish
• Centercutting design allows plunge milling without a pre-drilled entry point
• Right-hand cut and right-hand flute spiral for standard CNC and manual mill setups
• Bright/uncoated finish suitable for use with cutting fluids on a variety of materials

Compatibility

Designed as an OEM-style solid carbide corner radius end mill for use in standard 5/16-inch straight-shank toolholders on CNC machining centers and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines. Secure the shank fully into a clean, properly sized collet or end mill holder and torque the retention mechanism per the toolholder specification. Always power down and lock out the spindle before changing tooling. Do not exceed the recommended depth of cut or feed rate for the cutter diameter and workpiece material combination.