Accupro 313212 Square End Mill 3/8 in 2 Flute Solid Carbide Zrn

Product Description

The ACCUPRO 313212 is a 2-flute solid carbide square end mill built for precision milling operations in metal fabrication, toolrooms, and production machining environments. The cutter features a 3/8-inch mill diameter with a 1-1/2-inch length of cut and a 4-inch overall length, placing it in the long-series category for extended-reach applications. A 45-degree helix angle promotes aggressive chip evacuation and smooth cutting action. The ZrN (zirconium nitride) coating improves surface hardness and heat resistance, extending tool life in ferrous and non-ferrous materials. This end mill is single-end, right-hand cutting, and manufactured from micrograin carbide for consistent edge integrity across the full depth of cut.

This tool is suited for slotting, profiling, and peripheral milling operations on machining centers and CNC mills where extended reach is required. The long-series geometry makes it appropriate for deep-pocket work and tall-workpiece setups where a standard-length end mill would not reach. It is typically installed and run by machinists and tool-and-die professionals working in job shops, production facilities, and maintenance machine shops. The centercutting design allows direct plunge entry without a pre-drilled hole.

Key Features

• 3/8-inch mill diameter with tight tolerance of +0.000 / -0.002 inches for accurate slot and profile work
• ZrN coating increases surface hardness and thermal resistance, extending tool life in demanding cuts
• 45-degree helix angle promotes efficient chip evacuation and reduced cutting forces
• Micrograin solid carbide substrate provides uniform hardness and fracture resistance at the cutting edge
• Centercutting design permits direct plunge milling without a pilot hole
• Right-hand cut and right-hand spiral flute direction for use with standard CNC and manual mill spindles

Compatibility

Designed as an OEM-style replacement or direct-fit cutting tool for CNC machining centers and manual vertical mills accepting a 3/8-inch straight shank via ER collet, end mill holder, or equivalent toolholding system.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and the control in a safe state. Secure the 3/8-inch shank in a clean, properly sized collet or end mill holder and tighten to the toolholder manufacturer's specification. Inspect the cutting edges and coating for chips or damage before mounting. Follow your facility's speeds-and-feeds guidelines for carbide end mills in the material being cut; do not exceed the rated depth of cut for long-series tooling, as extended overhang increases deflection risk.