Guhring 9055190093400 Cobalt Drill Bit Letter U Tin

Product Description

The GUHRING 9055190093400 is a cobalt (M35 grade) jobber-length drill bit sized to Letter U (0.3680 inches decimal equivalent), designed for demanding metal-cutting applications in production and maintenance environments. It carries a Titanium Nitride (TiN) coating for improved wear resistance and runs a 118-degree four-facet split point that reduces thrust and improves hole entry accuracy. The straight-cylindrical shank measures 9.34 mm in diameter, and the overall length is 125 mm with a flute length of 81 mm. Licensed tradespeople and machinists working in HVAC fab shops, plumbing fabrication, and general metalworking rely on this geometry for clean, repeatable holes in a range of base materials.

This drill bit is rated for use in aluminum, steel, stainless, and cast iron workpieces, reflected in the primary workpiece material codes K, M, N, and P. It conforms to DIN 338 standards, making it a direct fit for standard jobber-length tooling setups. Right-hand spiral fluting with a regular spiral type and a 5xD flute-to-diameter ratio handles chip evacuation efficiently in through-hole and moderate-depth drilling operations. Maximum drilling depth reaches 66.99 mm (2.637 inches). The web-thinned, tapered web configuration reduces cutting force at the center of the bit, which matters when drilling harder alloys or thick-wall tubing common in trade fabrication work.

Key Features

• Letter U size (0.3680 inches) cobalt M35 construction for heat and wear resistance
• TiN coating extends tool life in repetitive drilling cycles
• 118-degree four-facet split point reduces walking and entry thrust
• Web-thinned tapered web lowers cutting force, especially in harder workpiece materials
• DIN 338 standard jobber length for compatibility with standard drill chucks and press setups
• Right-hand, two-flute regular spiral for positive chip clearance

Compatibility

Conforms to DIN 338 jobber-length standards and fits any standard drill chuck or drill press accepting a 9.34 mm straight-cylindrical shank. Rated for workpiece material codes K, M, N, and P per the manufacturer spec sheet.

Installation Notes

Install in a drill press, hand drill, or CNC spindle with a chuck rated for the 9.34 mm straight shank diameter. Secure the shank fully in the chuck jaws before operation and verify runout is within tolerance to avoid premature edge wear. Use appropriate cutting fluid or coolant when drilling steel or stainless to protect the TiN coating and maintain bit life; coolant-through is not supported on this bit. Follow shop safety practices and applicable OSHA machine-guarding requirements when operating rotary cutting tools.