Guhring 9055190043900 Cobalt Drill Bit No. 17

Product Description

The GUHRING 9055190043900 is a cobalt jobber length drill bit designed for precision drilling in metal fabrication and general industrial applications. Built to DIN 338 standards from M35 cobalt steel, this No. 17 wire gauge bit measures 0.173 inches (4.39 mm shank diameter) and features a titanium nitride (TiN) coating that extends cutting life by reducing friction and heat buildup. The four-facet split point geometry self-centers on entry and reduces the need for a center punch. A two-flute spiral configuration with a regular spiral type handles chip evacuation efficiently. Licensed HVAC techs, machinists, pipefitters, and general tradespeople who drill into steel, aluminum, and similar materials reach for this type of tooling regularly.

This bit fits typical production and maintenance drilling tasks where a jobber length reach is appropriate. The straight-cylindrical shank seats in standard drill chucks without modification. Primary workpiece material codes K, M, N, and P indicate suitability for aluminum, cast materials, non-ferrous metals, and steel. The 5xD flute-to-diameter ratio and tapered web configuration support controlled penetration rates in sheet metal, structural steel, and aluminum extrusions common in HVAC ductwork framing, electrical enclosure work, and general mechanical assembly.

Key Features

• M35 cobalt steel construction for heat resistance in tough metal drilling
• Titanium nitride (TiN) coating reduces friction and extends tool life
• Four-facet split point self-centers and reduces walking on entry
• 118-degree point angle suits general-purpose metal and non-ferrous drilling
• Two spiral flutes with web thinning for efficient chip evacuation
• DIN 338 standard — 80 mm overall length, 47 mm flute length, 40.42 mm maximum drilling depth

Compatibility

Designed as a standard jobber length drill bit per DIN 338 specification, compatible with any 3-jaw drill chuck accepting a straight-cylindrical shank. Rated for primary workpiece material codes K, M, N, and P covering aluminum, non-ferrous metals, cast materials, and steel.

Installation Notes

A licensed machinist, maintenance technician, or journeyman tradesperson should secure the workpiece firmly before drilling to prevent movement and bit breakage. Ensure the chuck is fully tightened around the straight-cylindrical shank before operation. Use cutting fluid appropriate for the workpiece material to manage heat, particularly when drilling steel. Inspect the cutting edges before each use — TiN-coated cobalt bits show coating wear before steel degradation, so dull edges should be replaced rather than dressed in the field.