Guhring 9055190051100 Cobalt Drill Bit No. 7 Tin

Product Description

The GUHRING 9055190051100 is a cobalt jobber length drill bit in No. 7 wire size (0.2010 inches decimal), built to DIN 338 standards for consistent performance in demanding shop and field environments. The bit features a 118-degree four-facet split point with web thinning for fast, accurate hole starts and reduced thrust. A titanium nitride (TiN) coating extends cutting life by increasing surface hardness and reducing friction. With a straight-cylindrical shank measuring 5.11 mm in diameter and a 2-flute regular spiral configuration, it is compatible with standard drill chucks. This bit is installed by machinists, maintenance technicians, and skilled tradespeople working in metal fabrication and general-purpose drilling applications.

The 9055190051100 is suited for drilling aluminum, steel, stainless, and a range of ferrous and non-ferrous metals, reflecting its K, M, N, and P workpiece material codes per DIN 338 classification. It is designed for use in benchtop drill presses, milling machines, and hand-held power drills where a jobber length reach is appropriate. The overall length of 86 mm and a flute length of 52 mm provide a 5xD flute-to-diameter ratio, giving it adequate chip clearance for depths up to approximately 44.34 mm. This makes it a practical replacement or stocking bit for tool cribs and service vehicles handling general metalworking tasks.

Key Features

• No. 7 wire size, 0.2010 inches decimal diameter with tolerance of +0.000 to -0.018 mm
• M35 cobalt material grade with TiN coating for extended tool life in hard metals
• 118-degree four-facet split point with web thinning reduces walking and entry thrust
• 2-flute regular spiral, right-hand cut, 5xD flute-to-diameter ratio for efficient chip evacuation
• Tapered web configuration with straight-cylindrical shank for broad chuck compatibility
• Conforms to DIN 338 specification for dimensional and performance consistency

Compatibility

Designed as a DIN 338 jobber length replacement drill bit suitable for standard drill chucks accepting a 5.11 mm straight-cylindrical shank, appropriate for use across aluminum, low-alloy steel, stainless steel, and non-ferrous metals as defined by DIN workpiece material codes K, M, N, and P.

Installation Notes

This bit is installed by machinists and maintenance tradespeople using standard drill chucks on drill presses, CNC equipment, or portable power drills. Secure the shank fully in the chuck before operation and verify chuck key is removed. Use cutting fluid or coolant appropriate to the workpiece material to preserve coating life, as this series does not support coolant-through delivery. Inspect the cutting edges before each use and replace when chipping or dulling is observed to maintain hole tolerance.