Guhring 9003010010300 Micro Drill Bit 1.03 Mm Cobalt

Product Description

The GUHRING 9003010010300 is a cobalt micro drill bit engineered for precision drilling in small-diameter applications. With a 1.03 mm (0.0406 inch) cutting diameter and a 118-degree faceted point angle, this bit delivers accurate hole entry and consistent performance in tight-tolerance work. The bright/uncoated cobalt construction offers solid heat resistance compared to standard HSS tooling. The web-thinned, tapered web design reduces thrust force and improves chip evacuation. Overall length is 25 mm with a 6.80 mm flute length and a maximum drilling depth of 5.26 mm (0.207 inch). The 1.50 mm straight-cylindrical shank seats cleanly in standard collet and drill chuck setups. This bit is intended for machinists, toolmakers, and precision fabricators working with small-diameter through-hole and blind-hole operations.

The 9003010010300 is rated primarily for aluminum and non-ferrous materials, with secondary suitability for titanium alloys. It is built to DIN 1899 specification, making it appropriate for precision machine shop environments where dimensional accuracy and consistent hole quality are required. The spiral flute geometry and right-hand cutting direction suit standard CNC and benchtop drill press setups. The 5xD flute-to-diameter ratio supports depth control in micro-drilling applications where chip clearance is a critical factor.

Key Features

• 1.03 mm cobalt construction for improved heat resistance versus standard HSS
• 118-degree faceted point with web thinning reduces entry thrust and improves centering
• Tapered web configuration supports chip flow in shallow micro-drilling depths
• DIN 1899 specification ensures dimensional consistency across production runs
• Straight-cylindrical shank at 1.50 mm fits standard collet and chuck tooling
• Diameter tolerance of +0.000 to -0.004 mm for tight-clearance hole requirements

Compatibility

Designed as a DIN 1899-compliant micro drill bit suitable for use in CNC machining centers, benchtop drill presses, and precision hand drills equipped with appropriate collet or chuck systems accepting a 1.50 mm straight-cylindrical shank. Primary workpiece materials are aluminum and non-ferrous metals; secondary application includes titanium alloys.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or toolroom professionals familiar with micro-diameter tooling. Ensure the spindle and chuck are clean and true before seating the shank to avoid runout at this diameter. At 1.03 mm, the bit is susceptible to breakage from side-loading, misalignment, or excessive feed rates — use manufacturer-recommended speeds and feeds for cobalt tooling in the target material. Secure all workpieces firmly before drilling and use appropriate cutting fluid for titanium alloy applications.