Accupro 12181656 Square End Mill 23/64 in 2 Flute Carbide

Product Description

The ACCUPRO 12181656 is a solid carbide square end mill designed for precision milling in metal and composite materials. It features a 23/64-inch (0.3594 inch) cutting diameter with a 5/8-inch length of cut and a 3/8-inch shank diameter, giving it a compact stub-length profile suited for rigidity in tight setups. The 2-flute, spiral-flute geometry with a 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. This is an uncoated, centercutting tool, meaning it can plunge directly into the workpiece. It is installed and used by machinists and CNC operators in job shop, toolroom, and production environments.

This end mill is suited for slotting, profiling, and plunging operations on ferrous and non-ferrous materials where a tight-tolerance, stub-length tool is required. The right-hand cut and right-hand flute configuration is standard for conventional CNC machining centers and manual mills. The micrograin carbide substrate supports higher speeds and feeds compared to standard carbide grades, making it a solid choice for finish passes and light roughing on harder materials. The overall length of 2 inches and stub-length designation keep deflection low in applications where reach is not the primary concern.

Key Features

• 23/64-inch cutting diameter with a mill diameter tolerance of +0.000 / -0.002 inches for consistent fit
• Solid micrograin carbide construction for wear resistance and edge retention
• 40-degree helix angle with spiral flute geometry for efficient chip evacuation
• Centercutting design allows direct plunge entry without a pre-drilled hole
• Right-hand cut, right-hand flute — standard orientation for most CNC and manual mills
• Stub length (2-inch OAL) minimizes deflection and maximizes rigidity in short-reach applications

Compatibility

Designed as an OEM-style replacement or direct-use square end mill for CNC machining centers and manual vertical mills accepting a 3/8-inch straight shank tool holder or collet.

Installation Notes

Installation is performed by machinists using a compatible collet chuck, end mill holder, or set-screw holder sized for a 3/8-inch shank. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank to the minimum insertion depth recommended for the holder type to maintain runout within tolerance. Verify shank diameter tolerance (-0.0001 / -0.0004 inches) is compatible with the holder before use.