Accupro 12179261 Ball End Mill 0.3281 in 4 Flute Carbide

Product Description

The ACCUPRO 12179261 is a solid carbide ball end mill designed for precision milling operations in metal cutting and finishing applications. Built from micrograin solid carbide, this single-end tool features a 0.3281-inch (21/64 inch) cutting diameter with a 0.625-inch length of cut and an overall length of 2 inches. The 4-flute, right-hand spiral geometry paired with a 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. The nACRo coating adds heat and wear resistance, extending tool life in demanding materials. Machinists and tool-and-die professionals rely on this geometry for contoured surfaces, slots, and complex 3D profiles.

This ball end mill is suited for use on CNC machining centers and manual mills in job shop, production, and tool room environments. Its 3/8-inch shank diameter fits standard collet chucks and end mill holders common in both vertical and horizontal machining setups. The 40-degree helix and nACRo coating make it particularly effective in harder alloys, stainless steels, and abrasive materials where tool life and surface finish are priorities. Extended reach is not featured on this tool, so it is best applied in standard-depth pockets and contour work where rigidity is maximized.

Key Features

• Micrograin solid carbide construction for rigidity and edge retention
• nACRo coating provides wear resistance and heat protection in hard and abrasive materials
• 4-flute, right-hand spiral design promotes smooth cutting and chip removal
• 40-degree helix angle improves cutting efficiency and surface finish
• Ball end geometry enables 3D contouring, radii, and blended surface work
• Mill diameter tolerance of +0.000 to -0.002 inches ensures consistent fit and finish

Compatibility

Designed as a direct-fit solid carbide ball end mill for standard 3/8-inch collet chucks and end mill holders used on CNC and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist following shop safety protocols. Secure the shank fully into a clean, properly sized collet or end mill holder and torque to the holder manufacturer specification. Verify runout at the tool tip before commencing cuts. Inspect the cutting edges for chips or wear before each use, and never exceed the tool manufacturer recommended depth of cut for the workpiece material.