Accupro 12183155 Corner Radius End Mill 3/4 in 4 Flute Altin

Product Description

The ACCUPRO 12183155 is a solid carbide corner radius end mill designed for precision milling in ferrous and hardened materials. It features a 3/4 inch diameter with a 0.03 inch corner radius, four right-hand spiral flutes, and an AlTiN (aluminum titanium nitride) coating that provides heat resistance and extended tool life in high-speed and dry-cutting applications. With a 2-1/4 inch length of cut and 5 inch overall length, this is a long-series end mill suited for deep-pocket and profile work. The 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. This tool is installed and operated by machinists and CNC programmers in job shop, production, and toolroom environments.

This end mill is appropriate for milling ferrous metals, alloy steels, and other materials where an AlTiN coating provides a thermal barrier advantage. The long length of cut makes it well suited for deep-cavity milling, side-wall finishing, and contour work where a standard-length end mill lacks sufficient reach. The centercutting geometry allows plunge entry as well as conventional profiling and slotting operations. It is a single-end tool with a 3/4 inch straight shank for use in standard end mill holders, collet chucks, and shrink-fit tooling.

Key Features

• AlTiN coating for heat resistance and extended tool life in high-speed and dry-cutting conditions
• 0.03 inch corner radius reduces stress concentration and improves edge strength compared to a sharp-corner end mill
• 40-degree helix angle promotes efficient chip evacuation and reduces cutting forces
• Centercutting design allows direct plunge entry without a pre-drilled pilot hole
• Long-series length of cut (2-1/4 inches) enables deep-pocket and deep-wall milling operations
• Micrograin solid carbide substrate for rigidity and dimensional stability under load

Compatibility

Designed as a direct-fit replacement or standard tooling selection for any CNC machining center or manual mill that accepts a 3/4 inch straight-shank end mill via an end mill holder, ER collet, or shrink-fit chuck.

Installation Notes

Installation and setup should be performed by a qualified machinist or CNC programmer. Ensure the machine spindle is fully stopped and locked out before loading or removing the tool. Verify holder runout and shank seating depth against the tool manufacturer's recommended engagement length before committing to a cut. Do not exceed the tool's rated length of cut when programming axial depth of cut, as exceeding this dimension places load on the unfluted shank.