Accupro 12178973 Square End Mill 17/64 in 4 Flute Carbide

Product Description

The ACCUPRO 12178973 is a solid carbide square end mill designed for precise milling operations in metal, composites, and other hard materials. With a 17/64 inch (0.2656 inch) cutting diameter and a 4-flute spiral geometry, this end mill delivers clean, accurate cuts at tight tolerances. The nACRo coating provides thermal resistance and lubricity at the cutting edge, extending tool life in demanding machining environments. The 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. This tool is installed and operated by machinists and CNC operators in job shops, manufacturing facilities, and tool-and-die operations.

This end mill suits applications requiring precise shoulder milling, slotting, and profiling in ferrous and non-ferrous materials. The centercutting design allows plunge entry, expanding its range of use without a pre-drilled pilot hole. With a 3/4 inch length of cut and a 5/16 inch shank diameter, it is sized for light to medium-duty work on benchtop mills, vertical machining centers, and CNC routers where controlled depth and close-tolerance finishing are required.

Key Features

• Solid carbide micrograin substrate for rigidity and wear resistance in high-speed applications
• nACRo coating improves heat resistance and reduces friction at the cutting edge
• 40-degree spiral helix promotes chip evacuation and reduces cutting forces
• Centercutting geometry allows direct plunge milling without pre-drilling
• Right-hand cut with right-hand flute direction for standard CNC and manual mill setups
• Tight diameter tolerance of +0.000 / -0.002 inch ensures repeatable, accurate fits

Compatibility

Designed as a standard shank square end mill compatible with 5/16 inch collets and end mill holders on vertical machining centers, knee mills, and CNC milling machines.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with tool-holding systems and safe spindle speeds for carbide tooling. Ensure the machine spindle and collet or end mill holder are clean and free of chips before seating the shank. Follow the machine manufacturer and tooling supplier guidelines for recommended speeds and feeds based on workpiece material and depth of cut. Inspect the cutting edges for chipping or wear before each use and replace the tool if damage is observed.