Guhring 9003010015900 Micro Drill Bit 1.59mm Cobalt

Product Description

The GUHRING 9003010015900 is a cobalt micro drill bit engineered for precision drilling in small-diameter applications. Built to DIN 1899 specifications, this bit measures 1.59 mm (0.0626 inches) in diameter with a 30 mm overall length and a 10.60 mm flute length. The 118-degree faceted point geometry and web-thinned, tapered web construction reduce entry force and improve centering accuracy. The bright, uncoated cobalt construction offers solid heat resistance without a coating that could alter the cutting edge profile. Licensed machinists, toolmakers, and precision fabricators rely on this bit for tight-tolerance micro-drilling work.

This drill bit is suited for precision machining environments where small-bore accuracy is critical. Primary workpiece materials include aluminum and non-ferrous metals, with secondary suitability for titanium alloys and other difficult-to-machine materials. The straight-cylindrical shank (2.00 mm diameter) fits standard collet chucks and drill presses used in CNC and manual machining setups. With a maximum drilling depth of 8.22 mm (0.324 inches) and a 5xD flute-to-diameter ratio, it handles through-hole and blind-hole operations in compact workpiece geometries.

Key Features

• Cobalt tool material for increased hardness and heat resistance over standard high-speed steel
• 118-degree faceted point angle with web-thinned, tapered web for reduced thrust and improved self-centering
• Bright/uncoated finish maintains consistent edge geometry right out of the package
• DIN 1899 Series 301 specification ensures dimensional conformance for repeatable performance
• Straight-cylindrical shank at 2.00 mm diameter for compatibility with standard collet and chuck systems
• Right-hand spiral flute with regular helix for efficient chip evacuation in shallow micro-hole drilling

Compatibility

Designed as an OEM-specification replacement or production-use micro drill bit for machining centers, CNC drill presses, and manual drilling fixtures that accept a 2.00 mm straight-cylindrical shank. Rated primarily for aluminum and non-ferrous workpieces, with secondary suitability for titanium alloy as noted in manufacturer data.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with micro-diameter tooling. Secure the shank fully in a precision collet or chuck rated for the 2.00 mm shank diameter before use. Power down and lock out the machine before loading or unloading the bit. Micro-diameter cobalt bits are brittle under lateral loading — avoid side pressure and use consistent feed rates appropriate for the workpiece material to prevent breakage.