Guhring 9005490073700 Jobber Drill Bit Letter L Hss

Product Description

The GUHRING 9005490073700 is a jobber length drill bit sized to Letter L (0.2902 inches) and manufactured from high speed steel with a bright, uncoated finish. Designed to DIN 338 standards, this bit features a 130-degree split point with web thinning and a parabolic flute geometry that improves chip evacuation and reduces heat buildup during extended drilling cycles. The straight-cylindrical shank measures 0.2902 inches in diameter, and the overall length is 4-9/32 inches with a flute length of 2-23/32 inches. It is a high-performance grade tool suitable for demanding production and maintenance drilling applications where consistent hole quality and tool life are required.

This drill bit is rated primarily for aluminum and other non-ferrous and ferrous materials within the K, N, and P workpiece material codes per DIN classification. The parabolic flute design with a 5xD flute-to-diameter ratio and a maximum drilling depth of 2.281 inches makes it well suited for through-hole and blind-hole drilling in sheet metal, structural components, and machined parts. Machinists, maintenance technicians, and metalworking professionals will find this bit appropriate for both CNC and manual drill press operations. Coolant-through capability is not present in this design.

Key Features

• Letter L size — 0.2902 inch decimal equivalent for precise fitment to standard hole charts
• 130-degree point angle with web thinning for reduced thrust and cleaner entry
• Parabolic flute geometry promotes fast chip removal and reduced friction
• High speed steel construction with bright uncoated finish for general-purpose use
• Meets DIN 338 standard for jobber length geometry and dimensional tolerance
• Right-hand cut, straight-cylindrical shank compatible with standard drill chucks

Compatibility

Designed as a DIN 338 jobber length replacement or direct-use drill bit for applications in aluminum and compatible K, N, and P category workpiece materials as defined by the supplied specification data.

Installation Notes

This bit is installed by a machinist or maintenance technician into any standard drill chuck accepting a straight-cylindrical shank of 0.2902 inches. Ensure the chuck is fully tightened and the workpiece is securely clamped before operation. For optimal tool life, use appropriate cutting fluid or lubricant when drilling ferrous materials, even though the bright finish does not include a built-in coating. Inspect the cutting edges before each use and replace the bit if chipping or wear is observed.