Accupro 12181790 Square End Mill 5/16 in 2 Flute Solid Carbide

Product Description

The ACCUPRO 12181790 is a solid carbide square end mill designed for precision milling in ferrous and non-ferrous metals. It features a 5/16 inch cutting diameter and a 1-3/8 inch length of cut, making it suitable for slotting, profiling, and plunge cuts in demanding CNC and manual machining applications. The 40-degree helix spiral flute geometry promotes efficient chip evacuation and reduces cutting forces. An AlTiN (aluminum titanium nitride) coating adds heat resistance and extends tool life in dry or high-speed cutting environments. This tool is installed and operated by machinists, toolroom technicians, and CNC setup personnel.

This end mill is suited for use in vertical machining centers, knee mills, and CNC routers where a right-hand cut, right-hand flute tool is required. The extra-long length category allows access to deeper features compared to standard-length end mills of the same diameter. The centercutting design enables direct plunge entry without a pre-drilled pilot hole, adding flexibility during contouring and pocket milling operations. It is a single-end tool used in standard end mill holders, collet chucks, or shrink-fit toolholders with a 5/16 inch bore.

Key Features

• Solid carbide micrograin substrate provides rigidity and wear resistance at elevated cutting speeds
• AlTiN coating enhances thermal hardness for dry machining and high-speed applications
• 40-degree helix angle promotes smooth cutting action and efficient chip flow
• Centercutting capability allows direct plunge milling without a pilot hole
• Right-hand cut and right-hand flute configuration is compatible with standard spindle rotation
• Extra-long length category with 1-3/8 inch LOC provides reach for deeper pockets and features

Compatibility

Designed as a direct-fit replacement or standard tooling selection for any machine spindle accepting a 5/16 inch shank end mill via collet, end mill holder, or shrink-fit toolholder.

Installation Notes

This tool is installed by machinists or CNC technicians. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank to the full recommended gauge length in the toolholder and torque the retention fastener per the toolholder manufacturer specifications. Do not exceed the tool manufacturer recommended speeds and feeds for the workpiece material and coating type to avoid premature tool failure.