Guhring 9003010008100 Cobalt Micro Drill Bit Wire 67

Product Description

The GUHRING 9003010008100 is a cobalt micro drill bit designed for precision drilling in small-diameter applications. It carries a wire gauge size of 67, equal to 0.0319 inches in decimal, and features a 118-degree faceted point angle with web thinning for cleaner entry and reduced thrust. The overall length is 0.9840 inches with a straight-cylindrical shank diameter of 1.50 mm. The bright, uncoated finish is standard for cobalt tooling used across a wide range of metals. This bit is suited for machinists, tool-and-die shops, and precision fabricators working with tight-tolerance small-hole applications.

This micro drill bit is primarily intended for drilling aluminum and secondarily rated for titanium alloys. The Series 301 designation follows DIN 1899 specification, which governs short-drill geometry for small diameters. The 5xD flute-to-diameter ratio and spiral regular flute type make it appropriate for shallow, controlled holes in both manual and CNC drilling setups. Maximum drilling depth is 0.1610 inches (4.09 mm), consistent with its short-series geometry. It is sold individually but carries a minimum order quantity of 10 units.

Key Features

• Wire size 67 (0.0319 inches decimal) cobalt construction for heat and wear resistance
• 118-degree faceted point with web thinning and tapered web configuration for reduced entry force
• DIN 1899 Series 301 short-drill geometry for precision micro-hole applications
• Straight-cylindrical shank at 1.50 mm diameter for standard collet or chuck compatibility
• Bright, uncoated finish — compatible with cutting fluids and coolants
• Right-hand cut with regular spiral flutes; no coolant-through required

Compatibility

Rated for primary use in aluminum (material codes K, M, N, P) and secondary use in titanium alloys (material code S). Designed as a DIN 1899-compliant replacement or production micro drill for any setup accepting a 1.50 mm straight-cylindrical shank.

Installation Notes

Micro drill bits of this diameter should be installed in a precision collet or high-concentricity chuck to minimize runout and prevent breakage. Always confirm spindle speed and feed rate are appropriate for the workpiece material before drilling. Cobalt tooling can be used with or without cutting fluid, but lubrication is recommended when drilling titanium alloys to extend tool life. Power down the machine completely before changing tooling.