Accupro 312145 Corner Radius End Mill 3/8 in 5 Flute

Product Description

The ACCUPRO 312145 is a solid carbide corner radius end mill designed for precision milling applications in metalworking and machining environments. Built from micrograin solid carbide and coated with AlCrTiN for heat and wear resistance, it features a 3/8 inch diameter, a 0.030 inch corner radius, and a 5-flute configuration with a right-hand spiral and right-hand cutting direction. The 38-degree helix angle promotes efficient chip evacuation. Variable index flute spacing reduces harmonic vibration during aggressive cuts. This tool is centercutting and suited for plunge, slot, and profile milling operations performed by machinists in CNC and manual milling setups.

The 312145 is intended for ferrous and hard-material milling where a corner radius end mill reduces corner chipping and extends tool life versus a sharp-corner geometry. With a 1/2 inch length of cut, a 2-1/8 inch reach length, and a 4 inch overall length, it is well suited for extended-reach work in pockets, slots, and contoured surfaces. The single-end configuration and 3/8 inch shank diameter make it compatible with standard collet chucks and end mill holders found in most production and job-shop environments.

Key Features

• AlCrTiN coating provides high-temperature and oxidation resistance for dry or near-dry cutting
• Micrograin solid carbide substrate delivers rigidity and edge retention
• 5-flute variable index design reduces vibration and improves surface finish
• 0.030 inch corner radius protects cutting edges and reduces workpiece stress concentrations
• Extended reach geometry with 2-1/8 inch reach length and reduced neck diameter of 0.356 inches
• Centercutting capability allows direct plunge entry into the workpiece

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide end mill for standard 3/8 inch collet chucks, end mill holders, and hydraulic toolholders used in CNC machining centers and manual knee mills.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and locked out per shop safety procedures. Seat the 3/8 inch shank fully into the holder and torque the retention mechanism to the toolholder specification. Inspect the cutting edges for chips or coating damage before use. Handle carbide tooling with care to avoid edge chipping during storage and setup.