Guhring 9064000025000 Micro Drill Bit 2.5mm Carbide

Product Description

The GUHRING 9064000025000 is a solid carbide micro drill bit engineered for precision drilling in demanding metalworking applications. Part of the Guhring Series 6400, it features a 2.5 mm diameter (0.0984 inch), a 140-degree faceted point, and a TiAlN coating that extends tool life when cutting through abrasive and high-strength materials. The straight-cylindrical shank measures 4.0 mm in diameter, and the overall length is 59.0 mm with a 15.0 mm flute length. The tapered web configuration and right-hand spiral flute geometry promote efficient chip evacuation and stable hole entry, making this bit a reliable choice for high-precision machining operations.

This drill bit is intended for use in CNC machining centers, drill presses, and precision bench equipment where tight tolerances are required. It is suited for production and maintenance shops working with cast iron, stainless steel, carbon steel, aluminum, and titanium alloys. The 4xD flute-to-diameter ratio supports drilling to a maximum depth of 11.9 mm. It is typically installed and operated by machinists and tool-and-die professionals in both job shop and production floor environments.

Key Features

• Solid carbide construction using Guhring DK460UF material grade for rigidity and wear resistance
• TiAlN coating improves heat resistance and extends tool life in ferrous and exotic alloy cutting
• 140-degree faceted point angle reduces thrust force and improves hole entry accuracy
• Tapered web with right-hand regular spiral flute for reliable chip evacuation
• Diameter tolerance of +0.002 to +0.012 mm supports close-tolerance hole requirements
• Straight-cylindrical shank compatible with standard collet and drill chuck toolholders

Compatibility

Designed as an OEM-style solid carbide micro drill for use in standard collet chucks and precision drill holders accepting a 4.0 mm straight-cylindrical shank. Primary workpiece materials include cast iron, stainless steel, and steel; secondary materials include aluminum and titanium alloy.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with carbide tooling requirements. Secure the shank fully in a collet or drill chuck rated for the shank diameter before use, and verify runout is within acceptable limits for the application. Carbide tooling is brittle and susceptible to chipping from side loading or interrupted cuts — avoid using damaged or improperly balanced holders. Coolant-through is not supported on this bit, so adequate external coolant or air blast should be applied per shop practice when drilling deep holes.