Accupro 12178881 Square End Mill 15/64 in 3 Flute Carbide

Product Description

The ACCUPRO 12178881 is a solid carbide square end mill designed for precision milling in demanding metal-cutting applications. It carries a 15/64 inch (0.2344 inch) cutting diameter and a 3/4 inch length of cut, with a 1/4 inch shank diameter and a 2-1/2 inch overall length. The three-flute, right-hand spiral geometry paired with a 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. An nACRo coating extends tool life in high-heat, high-speed environments. This end mill is center-cutting and suited for slotting, profiling, and plunge operations performed by machinists and tool-and-die professionals.

This end mill is intended for use in CNC machining centers and manual mills where tight tolerances and surface finish quality are priorities. The micrograin carbide substrate supports high-speed cutting in alloy steels, stainless steels, and other demanding workpiece materials. Its single-end configuration and fixed right-hand cutting direction make it a straightforward drop-in for standard toolholders. Typical applications include aerospace, automotive, and precision job-shop work where consistent diameter tolerance and coating performance are required.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance
• nACRo coating for extended tool life in high-temperature cutting conditions
• 40-degree helix angle promotes efficient chip evacuation and reduces cutting forces
• Center-cutting geometry allows direct plunge entry into workpiece material
• Right-hand cut and right-hand flute direction compatible with standard spindle rotation
• Mill diameter tolerance of +0.000 / -0.002 inch ensures consistent fit and finish

Compatibility

Designed as a standard 1/4 inch shank square end mill compatible with collet chucks, end mill holders, and other 1/4 inch bore toolholding systems used in CNC and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank to the recommended engagement depth in the toolholder and torque retention screws or collet nuts per the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning the cut, as excessive runout will accelerate tool wear and degrade surface finish.