GEK 2B R1.25xD4x5x50 -2 flute

Description

GEK 2B R1.25xD4x5x50 -2 flute 65 hrc carbide ball nose is a precision engineered cutting tool designed for fine detailing and 3D contouring applications. This solid carbide ball nose end mill features a Radius of 1.25mm (R1.25), which equates to a 2.5mm cutting diameter. It is built with a robust 4mm shank (D4), a compact 5mm flute length, and a standard Overall Length (OAL) of 50mm. Rated for extreme hardness up to 65 HRC, this tool is the ultimate solution for machining hardened tool steels, die steels, and heat-treated alloys typically found in the mold and die industry.

The 2-flute design is essential for effective chip evacuation when profiling curved surfaces. Machinists frequently search for a 2 flute ball nose cutter because it offers ample chip clearance, preventing clogging during deep 3D carving or engraving operations. The specific geometry of this R1.25 ball mill allows for smooth surface finishes, reducing the need for manual polishing on complex molds. The “stub” flute length of 5mm significantly increases the core strength of the tool, minimizing deflection and vibration (chatter), which is critical when working with a small diameter like 2.5mm.

Ideally suited for CNC milling centers and high-speed engraving machines, this ball nose bit for hardened steel utilizes a premium micro-grain carbide substrate. Often paired with a high-performance Blue Nano Coating, this tool resists thermal shock and wear, enabling dry machining at higher speeds. Whether you are performing semi-finishing or fine finishing passes, the CNC radius cutter maintains its geometry over long production runs.

This tool is particularly popular for “rib processing” and detailed corner radius work where a larger tool cannot reach. If you are looking for a carbide ball end mill that delivers high precision on materials like D2, P20, or H13 steel, this is the correct choice. The 4mm shank fits standard collets securely, providing excellent runout control. By upgrading to this 65 HRC ball nose, manufacturers in the aerospace, medical, and automotive sectors can achieve superior surface quality and dimensional accuracy in their 3D milled parts.