Accupro 12181393 Square End Mill 21/64 in 2 Flute Carbide

Product Description

The ACCUPRO 12181393 is a solid carbide square end mill designed for precision milling operations in metal, composite, and hard material applications. With a 21/64 inch (0.3281 inch) cutting diameter and a 7/8 inch length of cut, this two-flute end mill delivers sharp, accurate results in slotting, profiling, and plunge cutting. The TiCN (Titanium Carbonitride) coating increases surface hardness and wear resistance, extending tool life in ferrous and non-ferrous materials. Micrograin carbide construction provides rigidity and edge retention under demanding cutting conditions. Licensed machinists and CNC operators are the primary users of this tool.

This end mill suits light to medium-duty milling on CNC machining centers and manual mills where a small-diameter, high-precision cutting tool is required. The centercutting geometry allows direct plunge entry, making it versatile for both peripheral and slot milling operations. The 3/8 inch shank diameter fits standard collet and end mill holders common in most shop environments. The regular-length profile keeps deflection low during precision work on tight-tolerance features.

Key Features

• Solid micrograin carbide construction for rigidity and long edge life
• TiCN coating improves hardness and reduces tool wear in ferrous and non-ferrous cutting
• 40-degree helix angle promotes smooth chip evacuation and reduces cutting forces
• Centercutting design allows direct plunge milling without a pre-drilled pilot hole
• Right-hand cut and right-hand flute spiral for standard CNC and manual mill spindle compatibility
• Tight diameter tolerance of +0.000 / -0.002 inches ensures consistent, repeatable results

Compatibility

Designed as a standard-shank replacement or production end mill for CNC machining centers and manual vertical mills accepting 3/8 inch collets or end mill holders. No specific OEM model compatibility was provided with this product.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Power down and lock out the spindle before seating or removing the tool from the collet or holder. Ensure the collet bore and shank are clean and free of chips before tightening to prevent runout. Follow the machine manufacturer's torque specifications for the collet nut and verify tool runout with a dial indicator before cutting.