Guhring 9038990005100 Micro Drill Bit Wire 76 Carbide

Product Description

The GUHRING 9038990005100 is a solid carbide micro drill bit designed for precision drilling in ferrous metals including cast iron and steel. Built to Series 3899 standards, it carries a wire gauge size of 76 (0.0201 inches decimal) and features a 140-degree faceted point for clean entry with reduced thrust. The TiAlN coating improves heat resistance and extends tool life in demanding applications. The web-thinned design lowers cutting force at the tip. Overall length is 38 mm with a 7 mm flute length and a maximum drilling depth of 6.24 mm (0.2460 inches). Shank diameter is 3 mm with a straight-cylindrical profile and h7 diameter tolerance. This bit is suited for machinists, tool-and-die shops, and precision fabrication environments.

This micro drill bit is intended for small-diameter, high-precision drilling operations in cast iron and steel workpieces. The right-hand spiral flute geometry promotes efficient chip evacuation in tight bores. With a 5xD flute-to-diameter ratio, it handles depth-to-diameter demands common in precision component work. Typical applications include instrument components, fixtures, and tight-tolerance machined parts where a standard jobber drill would be too large or imprecise. The straight-cylindrical shank seats in standard collet chucks or drill presses without modification.

Key Features

• Wire size 76 (0.0201 inches) for precise small-diameter drilling
• 140-degree faceted point reduces thrust and improves entry accuracy
• TiAlN coating for elevated heat resistance and extended tool life
• Web-thinned design lowers cutting force at the drill tip
• Solid carbide construction in material grade K40 for rigidity and wear resistance
• Right-hand cut with regular spiral flute for efficient chip removal

Compatibility

Designed as an OEM-style precision micro drill for use in cast iron and steel workpieces, compatible with standard collet chucks and drill presses accepting a 3 mm straight-cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with micro-diameter drill operations. Secure the shank fully in a collet or chuck before initiating rotation. At wire-gauge diameters, feed rate and spindle speed must be carefully managed to avoid bit fracture. Do not exceed the rated maximum drilling depth of 6.24 mm without retracting to clear chips.