Guhring 9055190031700 Cobalt Jobber Drill Bit 1/8 in

Product Description

The GUHRING 9055190031700 is a cobalt jobber-length drill bit designed for high-performance drilling in metalworking and fabrication applications. Built to DIN 338 standards, this bit features a titanium nitride (TiN) coating over an M35 cobalt steel substrate, improving surface hardness and extending tool life in abrasive or work-hardening materials. The 118-degree four-facet split point reduces walking and lowers thrust requirements at entry. At 1/8 inch (0.1250 inches) in diameter with a 65 mm overall length, this bit suits production drilling environments where consistent hole quality and tool longevity are priorities. Installation is handled by machinists, tool-and-die professionals, and maintenance mechanics.

This bit is sized at 1/8 inch diameter with a straight-cylindrical shank of identical diameter, making it compatible with standard keyed and keyless drill chucks across benchtop drill presses, CNC machining centers, and handheld drills. The primary workpiece material codes listed are K, M, N, and P, indicating suitability for aluminum, non-ferrous metals, steel, and cast materials. A flute-to-diameter ratio of 5xD and a 36 mm flute length allow adequate chip evacuation at moderate depths up to approximately 1.23 inches (31.25 mm).

Key Features

• M35 cobalt steel construction for increased heat resistance over standard HSS
• TiN coating reduces friction and extends tool life in abrasive materials
• 118-degree four-facet split point minimizes drill walking and reduces thrust
• Web-thinned, tapered web configuration improves chip flow and reduces cutting torque
• DIN 338 standard geometry ensures consistent sizing and interchangeability
• Right-hand spiral flute with regular helix for reliable chip evacuation

Compatibility

Designed as an OEM-style replacement or standard tooling addition for applications requiring a 1/8 inch straight-shank jobber drill in DIN 338 geometry. Suitable for use in any 1/8 inch or larger drill chuck accepting straight-cylindrical shanks.

Installation Notes

This drill bit is installed by machinists and maintenance professionals using standard drill chucks or collet systems. Before changing tooling, de-energize and lock out the machine per applicable OSHA lockout/tagout procedures. Ensure the shank is fully seated and the chuck is tightened evenly before operation. Do not exceed the recommended maximum drilling depth of 1.23 inches without retracting to clear chips.