Accupro 12179020 Square End Mill 31/64 in 4 Flute Carbide

Product Description

The ACCUPRO 12179020 is a solid carbide square end mill designed for precision milling operations in metal, composite, and hard-material applications. The cutter measures 0.4844 inches (31/64 inch) in diameter with a 0.625-inch length of cut and a 0.500-inch shank diameter. It features four spiral flutes with a 40-degree helix angle and an nACRo coating that improves wear resistance and reduces heat buildup during aggressive cuts. The overall length is 2.5 inches. This tool is intended for use by machinists and tool-and-die professionals running CNC mills or manual milling machines.

This end mill suits finishing and semi-finishing passes in ferrous and non-ferrous metals, hardened steels, stainless alloys, and similar materials where a tight diameter tolerance is required. The micrograin carbide substrate supports higher feed rates and longer tool life compared to standard carbide grades. The centercutting geometry allows plunge entry into the workpiece. Right-hand cut and right-hand flute direction are standard for conventional and climb milling setups on most vertical and horizontal machining centers.

Key Features

• Solid micrograin carbide construction for extended tool life in hard materials
• nACRo finish coating reduces friction and improves heat dissipation at the cutting edge
• 40-degree helix angle promotes smooth chip evacuation and reduced chatter
• Centercutting design allows direct plunge milling without a pilot hole
• Four-flute spiral configuration balances material removal rate with surface finish quality
• Mill diameter tolerance of +0.000 / -0.002 inches supports close-tolerance work

Compatibility

Designed as a direct-fit replacement or standard tooling selection for 1/2-inch shank tool holders including ER collet chucks, end mill holders, and shrink-fit holders used on CNC machining centers and manual knee mills.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and locked out per shop lockout/tagout procedures. Seat the 0.500-inch shank fully into the holder to the recommended gauge-line depth before torquing the retention hardware. Inspect the cutting edges and coating for chips or wear before each use. Consult the machine tool and workholding manufacturer specifications for runout limits and maximum recommended spindle speeds for this diameter and material grade.