Accupro 12183199 Corner Radius End Mill 1/8 Inch 4 Flute

Product Description

The ACCUPRO 12183199 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and hardened materials. With a 0.125 inch mill diameter and a 0.01 inch corner radius, this tool generates smooth, radiused transitions on workpiece edges while reducing corner chipping and extending tool life. The 4-flute, right-hand spiral geometry with a 40-degree helix angle supports efficient chip evacuation and stable cutting at higher feed rates. The AlTiN coating provides thermal resistance and hardness, making this end mill suited for dry machining and high-speed applications. Licensed machinists and CNC operators working in job shop, aerospace, or precision manufacturing environments are the primary users.

This end mill is built for single-end, center-cutting use in vertical machining centers and CNC mills. The extra-long length of cut at 1 inch and a 3 inch overall length give access to deeper cavities and pockets where standard-length tools cannot reach. The 1/8 inch shank diameter matches standard collet and end mill holder tooling common in light-duty CNC setups and die-mold work. Right-hand cutting direction supports conventional and climb milling strategies on compatible machines.

Key Features

• 0.01 inch corner radius reduces stress concentration and edge chipping during finishing passes
• AlTiN coating improves heat resistance for dry and high-speed machining of ferrous alloys
• 40-degree helix angle promotes smooth chip flow and reduces cutting forces
• Extra-long 1 inch length of cut provides reach into deep slots and pockets
• Micrograin solid carbide construction delivers rigidity and wear resistance
• Center-cutting design allows plunge entry without pre-drilling

Compatibility

Designed for use in standard 1/8 inch collets and end mill holders on CNC vertical machining centers and manual knee mills equipped with compatible toolholding systems.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the control is in an e-stop or tool-change state before inserting or removing the end mill. Seat the shank fully in the collet or holder to the recommended grip length to minimize runout and prevent pullout during cutting. Verify runout with a dial indicator before initiating a production cut, especially given the small 0.125 inch diameter where deflection is a concern.