Guhring 9038990024500 Micro Drill Bit 2.45mm Carbide

Product Description

The GUHRING 9038990024500 is a solid carbide micro drill bit engineered for precision drilling in demanding industrial applications. Sized at 2.45 mm (0.0965 inches) in diameter with a 3.00 mm straight-cylindrical shank, it delivers tight tolerances under an h7 diameter classification. The 140-degree faceted point geometry promotes accurate entry and reduces walking on hard materials. A TiAlN coating increases surface hardness and thermal resistance, extending tool life in abrasive and high-temperature cutting conditions. Overall length is 38.00 mm with a 12.00 mm flute length and a maximum drilling depth of 8.33 mm (0.328 inches). This bit is installed by machinists, tool-and-die professionals, and precision fabricators working in CNC and manual drilling operations.

This drill bit is designed for use in cast iron and steel workpiece materials, consistent with Primary Workpiece Material Codes K and P. The Series 3899 five-times-diameter (5xD) flute-to-diameter ratio supports chip evacuation in blind and through-hole drilling scenarios. Its compact micro geometry makes it appropriate for tight-tolerance work in aerospace components, mold and die tooling, precision mechanical assemblies, and similar applications where small-diameter hole accuracy is critical. The regular spiral and web-thinned construction reduce thrust force requirements and improve centering at entry.

Key Features

• Solid carbide construction in material grade K40 for rigidity and wear resistance in hard materials
• TiAlN coating provides high-temperature and oxidation resistance for extended tool life
• 140-degree faceted point with web thinning reduces entry thrust and improves hole positioning
• h7 diameter tolerance ensures precise fit in applications requiring tight bore accuracy
• 5xD flute-by-diameter ratio supports chip evacuation in deeper micro holes up to 8.33 mm
• Straight-cylindrical shank compatible with standard collet and drill chuck toolholding systems

Compatibility

Designed for drilling cast iron and steel workpiece materials (Material Codes K and P). Intended for use in CNC machining centers, drill presses, and precision toolholding systems accepting a 3.00 mm straight-cylindrical shank. Part of the GUHRING Series 3899 micro drill line.

Installation Notes

Installation and tool changes should be performed by qualified machinists or tooling technicians with the machine fully powered down and locked out per applicable machine safety procedures. Secure the shank fully within the collet or chuck to the recommended grip depth before operation. Avoid side-loading this micro-diameter bit, as solid carbide tooling is brittle under lateral force. Verify spindle runout and toolholder concentricity before use to prevent premature breakage at this diameter.