Guhring 9038990009900 Micro Drill Bit Wire 61 Carbide

Product Description

The GUHRING 9038990009900 is a solid carbide micro drill bit designed for precision drilling in demanding metalworking applications. Built to Series 3899 standards, it carries a wire gauge size of 61 (0.0390 inches decimal) and features a 140-degree faceted point for accurate entry and reduced thrust. The TiAlN coating adds surface hardness and heat resistance, extending tool life in abrasive and high-temperature cutting conditions. A web-thinned geometry reduces cutting force at the center of the drill. The straight-cylindrical shank measures 3.00 mm in diameter, and overall length is 38.00 mm, making it suited for CNC and precision manual drilling setups requiring tight diameter tolerances to h7.

This micro drill bit is intended for use in cast iron and steel workpieces, covering primary material codes K and P. The 5xD flute-to-diameter ratio and 10.00 mm flute length support a maximum drilling depth of 8.52 mm (0.3350 inches). It is well-suited to precision machining environments, tool-and-die work, mold making, and production drilling where consistent hole geometry at small diameters is critical. Licensed machinists, CNC programmers, and precision tooling technicians are the typical end users for this product.

Key Features

• Wire size 61 (0.0390 inches) with h7 diameter tolerance for precision hole sizing
• 140-degree faceted point with web-thinning for reduced thrust and accurate entry
• TiAlN coating provides heat and wear resistance in steel and cast iron
• Solid carbide K40 grade substrate for rigidity at small diameters
• Spiral flute design with regular spiral type promotes chip evacuation
• Straight-cylindrical shank at 3.00 mm for standard collet and chuck compatibility

Compatibility

Designed for drilling cast iron (material code K) and steel (material code P) workpieces. Fits standard 3.00 mm straight-cylindrical collets and drill chucks used in CNC machining centers and precision bench drilling equipment.

Installation Notes

This tool is installed and operated by qualified machinists or CNC technicians. Secure the shank fully in a collet or drill chuck rated for the spindle speed required by the workpiece material. Power down and lock out the machine before changing tooling. Do not exceed the maximum drilling depth of 8.52 mm without retracting to clear chips, and use appropriate cutting fluid or dry cutting conditions as required by the workpiece material and machine specifications.