Guhring 9003010015500 Micro Drill Bit 1.55 Mm Cobalt

Product Description

The GUHRING 9003010015500 is a cobalt micro drill bit designed for precision drilling in small-diameter applications. Built to DIN 1899 specification, this bit features a 1.55 mm (0.0610 inch) diameter with a straight-cylindrical shank measuring 2.00 mm in diameter. The 118-degree faceted point with web thinning and a tapered web configuration reduces entry force and improves centering accuracy. The spiral flute geometry promotes chip evacuation from shallow holes. At 30 mm overall length with a 10.60 mm flute length, this bit suits benchtop drill presses, CNC machining centers, and precision hand drilling fixtures used by machinists and tool-and-die professionals.

This micro drill bit is suited for drilling aluminum, non-ferrous metals, and titanium alloys in production and prototype environments. Its bright uncoated cobalt construction handles elevated cutting temperatures better than standard high-speed steel, making it a practical choice for harder non-ferrous workpiece materials. The Series 301 designation places it within a standardized tool family, which simplifies reordering and tooling management on the shop floor. Typical applications include printed circuit board fixturing, precision instrument housings, and small-diameter through-hole work where dimensional accuracy is critical.

Key Features

• Cobalt tool material for improved heat resistance over standard HSS
• 118-degree faceted point with web thinning for accurate entry and reduced thrust
• Tapered web configuration supports chip clearance in shallow holes
• Straight-cylindrical shank for compatibility with standard collets and chuck styles
• Right-hand spiral flute cut with regular spiral type for consistent chip flow
• Diameter tolerance held to +0.000 to -0.004 mm for close-tolerance work

Compatibility

Designed as a DIN 1899 Series 301 micro drill bit with a 2.00 mm straight-cylindrical shank, suitable for use in standard collet chucks and precision drill fixtures that accept this shank size. Primary workpiece materials are aluminum and non-ferrous metals (material codes K, M, N, P); secondary workpiece material is titanium alloy (material code S).

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with small-diameter drill bit handling. Secure the shank fully in a precision collet or chuck before operation and verify runout is within acceptable limits, as micro-diameter bits are sensitive to lateral deflection. Do not exceed the maximum recommended drilling depth of 8.28 mm (0.326 inch) for this flute length. Coolant-through is not supported on this bit; apply cutting fluid externally when drilling titanium alloys to manage heat buildup.