Accupro 12182368 Corner Radius End Mill 1 in 4 Flute Carbide

Product Description

The ACCUPRO 12182368 is a solid carbide corner radius end mill engineered for precision milling in demanding metalworking applications. With a 1 inch cutting diameter, a 0.02 inch corner radius, and a 4-inch overall length, this single-end tool delivers controlled material removal while minimizing edge chipping at corners. The 40-degree helix angle promotes efficient chip evacuation and reduces cutting forces. The AlTiN (Aluminum Titanium Nitride) coating provides high heat resistance and extended tool life when machining hardened steels, stainless, and other abrasive alloys. Machining professionals and tool-and-die shops rely on this geometry for finishing passes where corner integrity is critical.

This end mill is suited for vertical and horizontal milling centers performing profiling, slotting, and finishing operations on ferrous and non-ferrous materials. Its centercutting design allows for plunge entry as well as conventional peripheral milling. The 1-3/4 inch length of cut (0.875 inches decimal) provides adequate reach for most medium-depth pocket and contour work without excessive tool deflection. The 1 inch shank diameter fits standard ER and side-lock toolholders commonly found in production and job-shop environments.

Key Features

• 0.02 inch corner radius reduces stress concentration and improves corner durability on finished workpieces
• AlTiN coating delivers high-temperature hardness for dry or near-dry cutting in ferrous alloys
• 40-degree helix angle promotes aggressive chip evacuation and smooth cutting action
• Micrograin solid carbide substrate provides rigidity and wear resistance over extended run times
• Centercutting geometry enables direct plunge milling without a pre-drilled entry hole
• Right-hand cut and right-hand flute spiral — compatible with standard spindle rotation

Compatibility

Designed as a direct-fit replacement or upgrade for 1 inch shank corner radius end mills in standard ER collet chucks, Weldon side-lock holders, and hydraulic toolholders with a 1 inch bore.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the tool path program is cleared before changing tooling. Verify the toolholder bore and collet are clean and free of chips before seating the shank. Confirm runout with a dial indicator after clamping — excessive runout will reduce tool life and surface finish quality.