Accupro 12178673 Corner Radius End Mill 1/2 in 5 Flute Altin

Product Description

The ACCUPRO 12178673 is a solid carbide corner radius end mill designed for precision milling in ferrous and high-temperature alloy materials. Built with five flutes and a 0.03 inch corner radius, this tool delivers a smooth blend between the side wall and floor of a milled pocket or slot while extending tool life through reduced stress concentration at the cutting edge. The AlTiN coating provides high heat resistance and hardness, making it well suited for dry or semi-dry machining at elevated cutting speeds. The right-hand spiral flute geometry and variable index design minimize chatter and improve surface finish in demanding applications.

This end mill is used in CNC machining centers and manual mills for contouring, slotting, profiling, and pocket milling in ferrous metals, stainless steels, titanium, and hardened materials. The centercutting geometry allows plunge entry. With a 2 inch length of cut and 4 inch overall length, it handles medium-depth features in a single pass without requiring an extended-reach configuration. Machinists and tool-and-die professionals install this tool in standard 1/2 inch collets or end mill holders.

Key Features

• 0.03 inch corner radius reduces edge chipping and improves floor-to-wall blends in milled pockets
• AlTiN coating provides oxidation resistance and hardness for high-speed machining of ferrous and exotic alloys
• Five-flute design increases feed rate capability compared to standard three- and four-flute tools
• Variable index flute spacing reduces harmonic vibration and chatter
• Centercutting geometry supports direct plunge entry
• Micrograin solid carbide substrate delivers rigidity and wear resistance

Compatibility

Designed for use in standard 1/2 inch end mill holders, collet chucks, and shrink-fit tooling systems on CNC machining centers and manual milling machines requiring a 1/2 inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist following shop safety protocols. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank to the full recommended insertion depth in the holder to prevent pullout under load. Verify runout with a dial indicator after clamping before initiating a cut, and confirm cutting parameters match the workpiece material and coating requirements before running at full feed and speed.