Guhring 9006600003800 Micro Drill Bit 0.015 in Cobalt

Product Description

The GUHRING 9006600003800 is a cobalt micro drill bit engineered for precision drilling in small-diameter applications. Part of the Series 660 lineup, it carries a TiN (titanium nitride) coating and features a 118-degree faceted point with web thinning for accurate entry and reduced thrust. The straight-cylindrical shank measures 1.00 mm in diameter and the overall length is 0.984 inches, making it well-suited for CNC machining centers, drill presses, and manual spindle setups where tight tolerances are required. Diameter tolerance is held to +0.000 to -0.004 mm, and the spiral flute geometry follows a 5xD flute-to-diameter ratio per DIN 1899.

This micro drill bit is intended for use in precision machining environments, including aerospace, medical device, and general metalworking shops. Its primary workpiece material rating covers aluminum and non-ferrous metals (material codes K, M, N, P), with a secondary rating for titanium alloys (code S). Maximum drilling depth is 0.072 inches (1.83 mm), and flute length is approximately 0.094 inches (2.40 mm). Typical applications include circuit board drilling, watchmaking fixtures, instrument components, and any close-tolerance through-hole work in thin stock. Each unit is sold individually; minimum order quantity is 10 pieces.

Key Features

• Cobalt construction with TiN coating for heat resistance and extended tool life in non-ferrous and titanium alloy materials
• 118-degree faceted point with web thinning reduces walking and lowers entry thrust at micro diameters
• Tapered web configuration and regular spiral flute type support chip evacuation in shallow-depth bores
• Diameter tolerance of +0.000 to -0.004 mm supports precision hole sizing without secondary reaming in many applications
• Straight-cylindrical shank fits standard collet and drill chuck tooling without adapter modification
• Conforms to DIN 1899 specification for consistent dimensional interchangeability

Compatibility

Designed as an OEM-specification micro drill bit per DIN 1899, compatible with standard straight-shank collets and drill chucks accepting a 1.00 mm shank diameter. Rated for aluminum, non-ferrous metals, and titanium alloys as stated by the manufacturer.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with micro-diameter drill bit handling. At 0.015 inches diameter, these bits are extremely fragile — ensure the spindle is fully stopped and the workpiece is securely fixtured before tool changes. Use the lowest runout collet or chuck available, as even minor misalignment at this diameter will cause premature breakage. Do not exceed the stated maximum drilling depth of 0.072 inches per plunge without retracting to clear chips.