Accupro 12176803 Corner Radius End Mill 1/4in 3 Flute Carbide

Product Description

The ACCUPRO 12176803 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining applications. It features a 1/4 inch cutting diameter, a 3/8 inch length of cut, and a 0.045 inch corner radius that reduces stress concentrations at the base of a cut and extends tool life. With 3 flutes and a 30-degree helix angle, it delivers efficient chip evacuation and a smooth finish. The bright/uncoated finish makes it well-suited for non-ferrous metals and general-purpose milling. It is centercutting, allowing plunge operations directly into the workpiece.

This end mill is intended for use in vertical machining centers, CNC mills, and manual knee mills across job shops, toolrooms, and production environments. It suits applications requiring a radiused corner profile on pockets, slots, and contoured features. The stub length configuration provides added rigidity, reducing deflection during aggressive cuts. Machinists and CNC operators working in aerospace, mold and die, and general metalworking will find this tool appropriate for finishing and semi-finishing passes where corner geometry is critical.

Key Features

• 0.045 inch corner radius reduces edge chipping and stress at cut transitions
• 3-flute geometry balances chip clearance and cutting edge strength
• 30-degree helix angle promotes smooth cutting action and efficient chip removal
• Centercutting design enables direct plunge entry without a pre-drilled hole
• Stub length provides increased rigidity and reduced deflection
• Bright/uncoated finish suited for non-ferrous metals and general-purpose milling

Compatibility

Designed as an OEM-style replacement or standard-fit tool for 1/4 inch shank collets and tool holders used in CNC machining centers and manual milling machines.

Installation Notes

Installation is performed by qualified machinists or CNC operators. Secure the 1/4 inch shank in a properly sized collet or end mill holder and torque the drawbar or retention mechanism per the machine tool manufacturer specifications. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Verify runout with a dial indicator after seating to maintain dimensional accuracy and tool life.