Accupro 12181208 Square End Mill 5/16 in 2 Flute Carbide

Product Description

The ACCUPRO 12181208 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. It features a 5/16 inch cutting diameter, a 3/4 inch length of cut, and a 4 inch overall length, placing it in the long-length category for extended reach applications. The micrograin carbide substrate provides wear resistance and edge retention at elevated cutting speeds. An AlTiN coating reduces heat buildup and extends tool life in ferrous and high-temperature alloy materials. This tool is typically installed and operated by machinists and CNC programmers in job shop, production, and maintenance machining environments.

This end mill is suited for slotting, profiling, and peripheral milling in ferrous metals, hardened steels, stainless alloys, and similar materials where a high-helix, coated carbide tool is appropriate. The 2-1/2 inch reach length makes it useful in deep-cavity or extended-reach setups where standard-length tooling cannot access the workpiece. The centercutting geometry allows plunge entry, giving the operator flexibility in toolpath programming without requiring a pre-drilled entry hole.

Key Features

• Solid micrograin carbide construction for rigidity and edge retention
• AlTiN finish for thermal resistance and extended tool life in ferrous materials
• 40-degree helix angle promotes efficient chip evacuation and smooth cutting action
• Centercutting design permits direct plunge entry
• Right-hand cut and right-hand spiral flute configuration
• Long-length series with 2-1/2 inch reach for deep-cavity access

Compatibility

Designed as a direct-fit replacement or standard tooling selection for CNC machining centers, knee mills, and manual milling machines accepting a 5/16 inch shank diameter collet or end mill holder.

Installation Notes

This tool is installed by machinists using an appropriate collet chuck, shrink-fit holder, or end mill holder rated for 5/16 inch shank diameter. Ensure the spindle is fully stopped and locked before tool changes. Verify runout with a dial indicator before beginning cuts, as extended-reach tooling is more sensitive to holder concentricity. Follow shop-standard speeds and feeds for the workpiece material and consult the tool manufacturer data sheet for starting parameters.