Accupro 311183 Ball End Mill 1/4 in 4 Flute Solid Carbide

Product Description

The ACCUPRO 311183 is a 4-flute, single-end ball end mill designed for high-performance milling in demanding machining environments. Built from micrograin solid carbide, it delivers the hardness and edge retention needed for aggressive cutting in hardened steels, stainless, and aerospace alloys. The tool features an AlTiCrN coating that improves heat resistance and reduces surface friction at elevated cutting temperatures. With a 38-degree right-hand helix and variable index flute geometry, it is engineered to reduce chatter and improve chip evacuation. Machinists use this tool for contouring, 3D profiling, and finishing passes where a ball-nose geometry is required.

This end mill suits CNC machining centers running demanding production or job-shop applications. Its 0.25-inch diameter and 0.5-inch length of cut make it well suited for detailed contouring and tight-radius profiling work. The straight cylindrical shank at 0.25 inches fits standard ER collets and end mill holders common in most vertical and horizontal machining centers. The standard-length overall profile at 2.5 inches keeps the tool stiff enough to minimize deflection during finish milling operations.

Key Features

• Micrograin solid carbide construction for superior hardness and edge retention
• AlTiCrN coating for enhanced heat resistance and extended tool life
• 38-degree right-hand helix promotes efficient chip evacuation and reduced cutting forces
• Variable index flute spacing reduces harmonics and chatter during cutting
• Ball-nose geometry suited for 3D contouring, profiling, and finishing passes
• Single-end design with a straight cylindrical shank for direct collet or end mill holder mounting

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide ball end mill for CNC machining centers accepting a 0.25-inch straight cylindrical shank via standard ER collets or end mill holders.

Installation Notes

Installation is performed by qualified CNC machinists or tooling setup personnel. Secure the shank fully within the collet or end mill holder to the minimum insertion depth recommended by the toolholder manufacturer before torquing the retention nut. Inspect the shank and collet bore for chips or contamination before seating. Always verify spindle speed and feed rate parameters against tooling manufacturer guidelines before initiating a cut.