Accupro 31927080 Ball End Mill 1/4 in 4 Flute Solid Carbide

Product Description

The ACCUPRO 31927080 is a single-end ball end mill designed for precision milling operations in ferrous and hardened materials. Built from solid carbide and coated with AlTiCrN, this tool delivers extended wear resistance and thermal stability at elevated cutting speeds. The 1/4 inch diameter ball nose geometry produces accurate contoured profiles, slots, and 3D surface finishes. With 4 flutes and a variable index design, it reduces harmonic vibration during deep-reach cuts. The 0.2330 inch length of cut and 1.0000 inch neck length allow access to features requiring tight clearance without sacrificing rigidity. Machinists and tool-and-die professionals use this tool on CNC machining centers for die cavities, mold work, and finishing passes.

This end mill suits applications in job shops, mold and die operations, and precision manufacturing environments where tight tolerances and fine surface finishes are required. The 1/4 inch shank diameter fits standard ER collets and end mill holders commonly found on vertical and horizontal CNC machining centers. The AlTiCrN coating performs well in high-temperature cutting environments typical of hardened steels, tool steels, and stainless alloys. The variable index flute spacing is particularly useful when chatter suppression is a priority on long-reach or thin-wall features.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding cutting conditions
• AlTiCrN coating provides thermal protection and extended tool life in high-heat applications
• 4-flute, variable index design reduces harmonic vibration and chatter during milling
• Ball nose geometry suited for 3D contouring, die cavities, and radius floor finishing
• 1.0000 inch neck length enables deep-reach access in pocketing and slot operations
• Single-end construction with 1/4 inch shank for compatibility with standard CNC toolholders

Compatibility

Designed for use with standard 1/4 inch ER collets and end mill holders on CNC vertical and horizontal machining centers.

Installation Notes

Installation should be performed by a qualified machinist following the toolholder manufacturer specifications for runout and projection length. Ensure the collet or toolholder is clean and free of debris before seating the shank to maintain concentricity. Confirm spindle speed, feed rate, and depth of cut are set per the material and coating guidelines before initiating a cut. Do not exceed the rated length of cut or apply lateral loads beyond the neck geometry.