Guhring 9005490076700 Jobber Drill Bit Letter N Hss

Product Description

The GUHRING 9005490076700 is a jobber length drill bit sized to Letter N (0.3020 inches), manufactured from high speed steel with a bright uncoated finish. Built to DIN 338 standards, this high-performance bit features a 130-degree point angle and a parabolic flute geometry that promotes efficient chip evacuation. The web-thinned, tapered web design reduces thrust during entry and improves hole quality. With an overall length of 4-19/32 inches and a straight-cylindrical shank, it seats securely in standard drill chucks and CNC toolholders. This bit is suited for machinists, maintenance technicians, and fabricators working in production or job-shop environments.

This drill bit is rated for primary use in aluminum and non-ferrous materials, as indicated by workpiece material codes K, N, and P. The parabolic flute design and web thinning make it particularly effective in materials that generate long, stringy chips. It fits standard jobber-length applications where moderate reach and rigid shank support are required. The 5xD flute-to-diameter ratio and 2.5000-inch maximum drilling depth suit through-hole and blind-hole work in light to medium production settings.

Key Features

• Letter N diameter: 0.3020 inches with a tolerance of -0.022 to 0.000 mm for consistent hole sizing
• 130-degree point angle for reduced thrust and cleaner entry in non-ferrous materials
• Parabolic flute geometry promotes rapid chip removal and reduces heat buildup
• Web-thinned tapered web lowers cutting forces and extends tool life
• Bright uncoated finish — suitable for aluminum and non-ferrous applications without coating-related adhesion concerns
• Meets DIN 338 specification for jobber length drills

Compatibility

Designed as a jobber length replacement drill bit for use in standard drill chucks, keyless chucks, and CNC toolholders accepting a 0.3020-inch straight-cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with drill press, lathe, or CNC spindle setup. Secure the shank fully in the chuck and verify runout before drilling. Always power down and lock out the machine before changing tooling. Use appropriate cutting fluid or coolant for the workpiece material even though this bit does not include through-coolant capability.