Guhring 9055190072000 Cobalt Jobber Drill Bit 7.2 Mm

Product Description

The GUHRING 9055190072000 is a cobalt steel jobber-length drill bit with a titanium nitride (TiN) coating, designed for precision hole-making in metalworking and industrial fabrication applications. Built to DIN 338 standards, this bit features a 7.2 mm diameter, a 118-degree four-facet split-point tip, and a right-hand spiral flute configuration. The M35 cobalt material grade provides elevated heat resistance compared to standard high-speed steel, making it suitable for harder and more abrasive workpiece materials. Overall length is 109 mm with a flute length of 69 mm and a maximum drilling depth of 58.2 mm.

This drill bit is suited for machining aluminum, steel, stainless, and cast iron workpiece materials, corresponding to material codes K, M, N, and P. It fits conventional drill presses, CNC machining centers, and handheld power tools accepting a straight-cylindrical shank. The 7.2 mm straight-cylindrical shank with a 40 mm shank length seats securely in standard collets and drill chucks. The Series 5519 designation places it within a consistent Guhring product family, allowing straightforward reorder and tooling standardization for shops running metric drill programs.

Key Features

• M35 cobalt steel construction for improved heat and wear resistance over standard HSS
• Titanium nitride (TiN) coating reduces friction and extends tool life
• 118-degree four-facet split point reduces thrust and improves self-centering
• Right-hand regular spiral flute with web-thinned, tapered web for efficient chip evacuation
• Meets DIN 338 standard; diameter tolerance of +0.000 to -0.022 mm
• 5xD flute-to-diameter ratio; no coolant-through required

Compatibility

Designed for use with workpiece materials in material code groups K, M, N, and P, including aluminum, steel, stainless steel, and cast iron. Fits any standard drill chuck or collet accepting a 7.2 mm straight-cylindrical shank.

Installation Notes

This bit is installed and serviced by machinists, tool-and-die technicians, and industrial maintenance professionals. Power down and lock out the machine spindle before inserting or removing the bit from the chuck or collet. Ensure the chuck or collet is clean and free of debris to maintain concentricity and achieve the rated diameter tolerance. Do not exceed the recommended maximum drilling depth of 58.2 mm in a single pass without retracting to clear chips.