Guhring 9006220093400 Cobalt Jobber Drill Bit Letter U

Product Description

The GUHRING 9006220093400 is a cobalt jobber-length drill bit sized to Letter U (0.3680 inches decimal) with a 130-degree split point and parabolic flute geometry. Built to DIN 338 standards, this heavy-duty bit is designed for right-hand cutting in demanding production and maintenance drilling applications. The parabolic flute profile promotes faster chip evacuation and reduced heat buildup, which is critical when drilling through tough ferrous materials. With an overall length of 4.9063 inches and a flute length of 3.1875 inches, it fits standard drill chucks with a 0.3677-inch straight cylindrical shank. A straw finish indicates the cobalt-grade steel composition without an additional coating layer.

This drill bit is suited for trade professionals and machinists working with steel, cast iron, aluminum, and other non-ferrous materials in both shop and field environments. The 5xD flute-to-diameter ratio supports deeper drilling passes with consistent chip clearance. A maximum drilling depth of 2.6370 inches makes it appropriate for through-hole and blind-hole work in structural, fabrication, and mechanical service applications where standard HSS bits underperform due to heat or hardness.

Key Features

• Letter U size — 0.3680 inches decimal diameter for precise hole sizing
• 130-degree point angle for reduced walking and faster material penetration
• Parabolic flute design promotes efficient chip evacuation in deep drilling
• Cobalt construction provides heat resistance for drilling steel and cast iron
• Web-thinned, tapered web configuration reduces thrust and extends bit life
• Manufactured to DIN 338 specification for consistent dimensional tolerances

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill for applications requiring a Letter U diameter hole in steel, cast iron, aluminum, and non-ferrous workpiece materials per DIN 338 Series 622 specification.

Installation Notes

Licensed machinists and trade professionals should secure the shank fully in a keyed or keyless drill chuck before operation and verify chuck capacity accommodates the 0.3677-inch shank diameter. Power down the drill press or deenergize the handheld tool before bit changes. Use appropriate cutting fluid or coolant when drilling ferrous materials to manage heat, even though this bit does not support through-coolant. Follow applicable shop safety codes and wear eye protection during all drilling operations.