Guhring 9064000028000 Micro Drill Bit 2.8 Mm Carbide

Product Description

The GUHRING 9064000028000 is a solid carbide micro drill bit designed for precision drilling in demanding metalworking applications. It features a 2.8 mm diameter, a 140-degree faceted point, and a TiAlN (titanium aluminum nitride) coating that extends tool life under high heat and abrasion. The overall length is 59 mm with a flute length of 16.80 mm and a maximum drilling depth of 13.40 mm. The straight-cylindrical shank measures 4.00 mm in diameter, making it compatible with standard collet and drill chuck systems. Licensed machinists, tool-and-die professionals, and CNC operators install and use this bit in production and precision machining environments.

This drill bit is engineered for use in ferrous and non-ferrous materials. Primary workpiece materials include cast iron, stainless steel, and steel (ISO material codes K, M, and P). Secondary workpiece materials include aluminum and titanium alloy (ISO codes N and S). The Series 6400 designation places it within a line engineered for micro-diameter, close-tolerance hole-making at a 4xD flute-by-diameter ratio. It is suited for CNC machining centers, drill presses, and precision bench work where small-diameter hole accuracy is required.

Key Features

• Solid carbide construction from DK460UF grade substrate for rigidity and wear resistance in hard materials
• TiAlN coating improves heat resistance and extends tool life in dry or semi-dry cutting conditions
• 140-degree faceted point with web thinning reduces thrust force and improves centering accuracy
• Tapered web configuration with regular spiral flute promotes chip evacuation in deep holes
• Diameter tolerance of +0.002 to +0.012 mm supports close-tolerance hole requirements
• Right-hand cut, straight-cylindrical shank fits standard collets and drill chucks without modification

Compatibility

Designed as an OEM-style replacement and production micro drill for use in CNC machining centers, drill presses, and similar equipment accepting a 4.00 mm straight-cylindrical shank. Suitable for primary workpiece materials including cast iron, stainless steel, and steel, as well as secondary materials including aluminum and titanium alloy.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom personnel familiar with micro-diameter tooling. Ensure the machine spindle and collet or chuck are clean and within tolerance before seating the shank, as runout directly affects hole quality and bit longevity at this diameter. Power down and lock out the machine before changing tooling. Avoid side loading or using this bit as a reamer, as carbide micro drills are brittle and susceptible to breakage under lateral force.