Guhring 9003010013700 Cobalt Micro Drill Bit 1.37 Mm

Product Description

The GUHRING 9003010013700 is a cobalt micro drill bit engineered for precision drilling in small-diameter applications. Sized at 1.37 mm (0.0539 inches) with a 118-degree faceted point angle, it delivers accurate entry and clean hole geometry in demanding materials. The bright/uncoated cobalt construction provides heat resistance and edge retention beyond standard high-speed steel. Overall length is 25 mm with a 9.50 mm flute length and a maximum drilling depth of 7.45 mm (0.293 inches). A web-thinned, tapered web configuration reduces thrust force at entry. This bit is used by machinists and precision fabricators working in aerospace, medical device, and general metalworking environments.

The 9003010013700 is rated primarily for aluminum and non-ferrous materials (material codes K, M, N, P) and is also suited for titanium alloy applications (material code S). Its Series 301 designation follows DIN 1899 specification, the standard governing jobber-length micro drills. The 1.50 mm straight-cylindrical shank fits standard precision collets and drill chucks used in CNC machining centers, drill presses, and high-speed hand tools. The 5xD flute-to-diameter ratio provides adequate chip clearance for the drilling depth range this bit is designed to handle.

Key Features

• Cobalt tool material for elevated heat resistance and extended tool life in hard and abrasive workpieces
• 118-degree faceted point with web thinning reduces entry thrust and improves centering accuracy
• Tapered web configuration supports chip evacuation through the spiral flute
• Diameter tolerance of +0.000 to -0.004 mm ensures consistent hole sizing
• DIN 1899 Series 301 construction provides a recognized industry standard geometry
• Bright/uncoated finish allows direct visual inspection of edge condition after use

Compatibility

Designed for use in precision drilling of aluminum, non-ferrous metals, and titanium alloys per material codes K, M, N, P, and S. The 1.50 mm straight-cylindrical shank is compatible with standard precision collets and drill chucks accepting that shank diameter.

Installation Notes

This micro drill bit is installed by machinists and toolroom technicians using precision collet systems or drill chucks. Before mounting, confirm the collet or chuck bore matches the 1.50 mm shank diameter to prevent runout. Spindle speed and feed rate should be set per the machine tool manufacturer guidelines for the workpiece material and drill diameter. Micro-diameter bits are brittle — avoid side loading, pecking cycles should be used to clear chips and reduce heat buildup at depth.