Guhring 9003010009800 Cobalt Micro Drill Bit 0.0386in

Product Description

The GUHRING 9003010009800 is a cobalt micro drill bit engineered for precision drilling in small-diameter applications. With a 0.0386-inch diameter and a 118-degree faceted point, this bit delivers accurate entry and minimal wandering on hard and abrasive workpiece materials. The web-thinned, tapered web design reduces thrust requirements at the cutting edge. Overall length is 0.984 inches, with a 1.50 mm straight-cylindrical shank. The bright, uncoated finish maintains a consistent edge profile. This bit is typically installed and used by machinists, tool-and-die makers, and precision fabricators working in tight-tolerance drilling operations.

This micro drill bit is suited for use in CNC machining centers, drill presses, and precision hand-held spindles where small-diameter hole production is required. The Series 301 design per DIN 1899 specification targets applications in aerospace, medical device, electronics, and general precision metalworking. It performs across a broad range of workpiece materials including aluminum, aluminum alloy, brass, cast iron, hardened materials, nickel alloy, stainless steel, steel, and titanium alloy. Right-hand spiral flute geometry promotes consistent chip evacuation in these materials.

Key Features

• 0.0386-inch diameter with diameter tolerance of +0.000 to -0.004 mm for tight-fit hole requirements
• 118-degree faceted point angle with web thinning for reduced thrust and cleaner entry
• Cobalt tool material provides heat and wear resistance in hard and abrasive alloys
• Right-hand cut, regular spiral flute promotes chip evacuation in deep or interrupted cuts
• Straight-cylindrical shank at 1.50 mm fits standard micro collets and drill chucks
• DIN 1899 Series 301 specification ensures dimensional consistency across the product line

Compatibility

Designed for use across a wide range of workpiece materials including aluminum, aluminum alloy, brass, cast iron, hardened materials, nickel alloy, stainless steel, steel, and titanium alloy. Suitable for any machine spindle or collet accepting a 1.50 mm straight-cylindrical shank.

Installation Notes

This bit is installed by machinists and precision fabricators using collet chucks or micro drill chucks rated for the 1.50 mm shank diameter. Ensure the machine spindle is fully stopped and locked before bit changes. Use appropriate cutting fluid or coolant for the target workpiece material to extend tool life, as this bit does not support through-coolant delivery. At micro diameters, feed rate and spindle speed should be set conservatively to avoid deflection or bit breakage.