Accupro 12181908 Square End Mill 5/32 in 3 Flute Carbide

Product Description

The ACCUPRO 12181908 is a solid carbide square end mill designed for precision milling operations in metal, composites, and engineering plastics. It features a 5/32 inch (0.1563 inch) cutting diameter, a 1/2 inch length of cut, and a 3/16 inch shank diameter, with an overall length of 2 inches. The three-flute spiral geometry runs a 40-degree helix angle, promoting efficient chip evacuation and smooth cutting action. Micrograin carbide construction delivers edge hardness and wear resistance suited to demanding production environments. This is a right-hand cut, right-hand flute tool with centercutting capability, making it suitable for both plunge entry and standard peripheral milling.

The 12181908 is intended for use in CNC machining centers, manual knee mills, and toolroom applications where tight tolerances on small-diameter features are required. Its regular-length profile and uncoated finish make it a practical general-purpose choice for operators working aluminum, mild steel, brass, and similar materials. The centercutting design allows direct plunge interpolation without a pre-drilled pilot hole, adding versatility in slotting and pocketing operations.

Key Features

• Solid micrograin carbide construction for edge retention and dimensional stability
• Three-flute spiral design with 40-degree helix for efficient chip flow
• Centercutting geometry allows direct plunge entry without a pilot hole
• Right-hand cut and right-hand flute configuration — standard CNC and manual mill compatible
• Uncoated finish suitable for use with cutting fluids on a wide range of materials
• Mill diameter tolerance of +0.000 / -0.002 inches for consistent fit in close-tolerance work

Compatibility

Designed as a general-purpose square end mill for use in standard 3/16 inch collets or end mill holders on CNC machining centers and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Confirm the spindle is fully stopped and locked out before changing tooling. Seat the 3/16 inch shank fully into a matched collet or end mill holder and torque the retention hardware per the toolholder specification. Verify runout with a dial indicator before beginning the cut, particularly when working to tight diameter tolerances.