Accupro 12178987 Square End Mill 31/64 in 4 Flute Carbide

Product Description

The ACCUPRO 12178987 is a solid carbide square end mill designed for precision milling operations in metalworking and machining environments. With a 31/64 inch (0.4844 inch) cutting diameter, 4-flute spiral geometry, and a 40-degree helix angle, this end mill delivers efficient chip evacuation and smooth surface finishes across a range of ferrous and non-ferrous materials. The nACRo finish provides enhanced wear resistance and thermal stability for extended tool life in demanding cuts. It is centercutting, allowing direct plunge entry into the workpiece. This tool is specified and installed by CNC machinists, tool and die makers, and precision machine shop technicians working on vertical and horizontal milling platforms.

This end mill fits standard 1/2 inch diameter collets and tool holders and is suited for use in CNC machining centers, knee mills, and other precision milling equipment. Its 1 inch length of cut (LOC) and 3 inch overall length (OAL) make it appropriate for moderate-depth slotting, profiling, and peripheral milling in production and job shop environments. The right-hand cut and right-hand flute configuration is the standard orientation for most vertical milling setups. The micrograin carbide substrate supports tighter tolerances and harder workpiece materials than conventional carbide grades.

Key Features

• Solid micrograin carbide construction for improved hardness and edge retention
• nACRo coating provides wear resistance and reduced heat buildup at the cutting edge
• 40-degree helix angle promotes efficient chip evacuation and reduces cutting forces
• Centercutting design allows direct plunge milling without a pre-drilled entry hole
• 4-flute spiral configuration for balance between chip clearance and surface finish quality
• Right-hand cut, right-hand flute — standard orientation compatible with conventional milling spindles

Compatibility

Designed for use in 1/2 inch diameter collet chucks, end mill holders, and shrink-fit tool holders on CNC machining centers and conventional vertical milling machines.

Installation Notes

Installation is performed by qualified machinists using appropriate collet wrenches or hydraulic tool holders rated for the 1/2 inch shank diameter. Always ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Verify runout after seating the tool to confirm proper holder engagement. Do not exceed the tool manufacturer-recommended depth of cut or feed rate for the workpiece material being machined.