Accupro 12184814 Ball End Mill 0.3906 in 4 Flute Carbide

Product Description

The ACCUPRO 12184814 is a solid carbide ball end mill designed for precision milling operations in metal, composites, and engineered plastics. With a 0.3906-inch (25/64 inch) cutting diameter and a 4-flute, right-hand spiral configuration, this tool delivers smooth surface finishes and efficient chip evacuation in both slotting and profiling applications. The 40-degree helix angle promotes aggressive yet stable cutting action, reducing chatter at higher feed rates. Manufactured from micrograin carbide and left uncoated, this end mill suits applications where coating compatibility or re-grinding frequency is a consideration. It is installed and operated by machinists and toolroom professionals on CNC and manual milling equipment.

This stub-length ball end mill is suited to close-tolerance 3D contouring, die and mold work, and finish passes on curved or sculptured surfaces. The 0.625-inch length of cut and 2-inch overall length make it well-suited to rigid setups with minimal overhang, which is critical when machining hardened or difficult-to-cut materials. The 7/16-inch shank diameter fits standard collets and end mill holders commonly found in vertical machining centers and knee mills. Single-end geometry maximizes tool body strength for demanding cut conditions.

Key Features

• 0.3906-inch (25/64 inch) ball nose diameter for precise radius profiling
• 4-flute, right-hand cut and right-hand flute spiral for improved surface finish
• 40-degree helix angle reduces cutting forces and chatter in deep passes
• Micrograin solid carbide construction provides hardness and edge retention
• Uncoated finish allows direct use on a wide range of materials without coating concerns
• Stub length type with 0.625-inch LOC maximizes rigidity and minimizes deflection

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide ball end mill compatible with standard 7/16-inch collets and end mill holders on CNC vertical machining centers and manual knee mills accepting right-hand tooling.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines for toolholder torque and runout requirements. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill from the holder. Verify collet condition and cleanliness before seating the shank to maintain concentricity within the shank diameter tolerance range. Select appropriate cutting parameters based on workpiece material, machine rigidity, and coolant availability before engaging the cut.