Robbjack SS-2-040-BN Ball End Mill 0.04in 2 Flute Carbide

Product Description

The ROBBJACK SS-2-040-BN is a miniature solid carbide ball end mill designed for precision milling in tight geometries. Built to stub length with a 0.04 inch cutting diameter and a 0.06 inch length of cut, this two-flute tool delivers both roughing and finishing capability in a single pass. The 30-degree right-hand helical flute geometry promotes efficient chip evacuation while maintaining edge stability at small diameters. The bright uncoated finish makes this mill well suited for applications where coating adhesion or heat buildup from thin-wall cuts would be a concern. CNC machinists and tool-and-die professionals are the primary users of this series.

The SS-2-040-BN is rated for use on a broad range of workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. The stub length configuration limits overhang and deflection, making it a practical choice for high-precision contouring, micro-slotting, and detail work in mold, die, and medical component applications. The straight cylindrical shank fits standard collet systems sized for 0.125 inch shanks.

Key Features

• Solid carbide construction for rigidity and wear resistance at miniature diameters
• Ball nose geometry enables 3D contouring and radius floor finishing
• 2-flute, right-hand helical design supports both roughing and finishing passes
• Stub length body minimizes deflection during high-precision cuts
• Bright uncoated finish suitable for a wide range of workpiece materials
• 0.02 inch nose radius with plus or minus 0.0005 inch diameter tolerance

Compatibility

Designed for use in CNC machining centers and high-speed spindles accepting a 0.125 inch straight cylindrical shank. Rated for steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials per material codes P, M, K, N, S, and H.

Installation Notes

Installation should be performed by qualified CNC machinists or tool-and-die technicians. Ensure the spindle is fully stopped and the machine is in a safe state before tool changes. Seat the shank fully in the collet and verify runout before beginning a cut. At miniature diameters, even small amounts of runout or collet contamination can cause premature edge failure.