Accupro 12182507 Corner Radius End Mill 5/16 in 4 Flute

Product Description

The ACCUPRO 12182507 is a solid carbide corner radius end mill designed for precision milling of ferrous and non-ferrous materials. It features a 5/16-inch diameter, a 1/8-inch (0.1250-inch) corner radius, and four right-hand spiral flutes with a 40-degree helix angle. The cutting edge is AlTiN coated for heat resistance and extended tool life in high-speed applications. At 2-1/2 inches overall length with a 3/4-inch length of cut, this single-end, centercutting tool is suited for slotting, profiling, and ramping operations. It is installed and operated by machinists and CNC programmers in job shop and production environments.

This end mill is used in CNC machining centers and manual mills for finishing and semi-finishing passes where a controlled corner radius is required to reduce stress concentrations in part geometry. The centercutting design allows plunge entry, adding versatility for pocketing and contour work. The micrograin carbide substrate supports tight tolerances and stable performance in harder workpiece materials. It is a common choice for aerospace, mold-and-die, and precision component work where corner geometry must be held consistently.

Key Features

• AlTiN coating provides thermal protection and wear resistance in demanding cutting conditions
• 0.1250-inch corner radius with a tolerance of plus or minus 0.00150 inches for consistent edge geometry
• Micrograin solid carbide substrate supports high cutting speeds and precise tolerances
• 40-degree helix angle promotes smooth chip evacuation and reduces cutting forces
• Centercutting geometry allows direct plunge entry for pocketing operations
• Right-hand flute direction and right-hand cutting for standard CNC spindle compatibility

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide corner radius end mill for standard 5/16-inch collet or end mill holders used in CNC machining centers and manual milling machines.

Installation Notes

Install into a clean, properly sized 5/16-inch collet or end mill holder and torque to the tool holder manufacturer specification. Inspect the shank and collet bore for chips or damage before seating the tool. Verify spindle speed and feed rate against the material and coating recommendations before engaging the cut. Handle carbide tooling carefully to avoid edge chipping during storage and setup.