Accupro 12178681 Corner Radius End Mill 1 in 5 Flute Altin

Product Description

The ACCUPRO 12178681 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and hardened materials. It features a 1 inch cutting diameter with a 0.03 inch corner radius that reduces stress concentrations at part corners and extends tool life in demanding cuts. With 5 flutes and a 40-degree helix angle, this end mill delivers improved chip evacuation and surface finish at higher feed rates. The AlTiN coating provides high-temperature oxidation resistance, making it well suited for dry or minimal-lubrication machining of steel, stainless, and cast iron. It is a centercutting design, allowing plunge entry directly into the workpiece. Machinists and CNC programmers in job shops, tool rooms, and production environments are the primary users.

This end mill is sized for medium to heavy material removal on vertical machining centers and CNC mills. The 2.75 inch length of cut accommodates deep-pocket milling, while the 1 inch shank diameter provides rigid tool holding in standard ER, shrink-fit, or side-lock holders. The variable index geometry helps reduce harmonic chatter during extended cuts. It is suitable for profiling, contouring, and slotting in mold and die work, aerospace components, and general precision machining where corner breaks or corner radii are required on finished edges.

Key Features

• 1 inch cutting diameter with 0.03 inch corner radius for controlled edge blending
• 5-flute, 40-degree right-hand spiral for high feed rates and improved surface finish
• AlTiN coating for high-temperature resistance in dry and hard milling applications
• Centercutting geometry allows direct plunge entry without pre-drilling
• Variable index flute spacing reduces chatter on long-reach cuts
• Micrograin solid carbide substrate for rigidity and wear resistance

Compatibility

Designed as a direct-fit replacement for 1 inch shank solid carbide corner radius end mills in standard CNC milling tool holders; no specific OEM model compatibility was provided in the product data.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the tool is secured with appropriate torque using a calibrated toolholder wrench before engaging. Verify runout with a dial indicator after tool installation; excessive runout will accelerate wear and compromise corner radius tolerance. Always confirm depth-of-cut and feed parameters are appropriate for the workpiece material before initiating a cutting cycle.