Guhring 9005490039000 Jobber Drill Bit 3.9mm Hss

Product Description

The GUHRING 9005490039000 is a jobber length twist drill bit designed for precision hole-making in a range of workpiece materials. Built from high speed steel with a bright uncoated finish, this bit features a 130-degree split point and a parabolic flute geometry that promotes efficient chip evacuation and reduced cutting resistance. At 3.9 mm (0.1535 inches) in diameter with an overall length of 75 mm (approximately 2.97 inches), it fits standard drill chucks and is suited for use in hand-held drills, drill presses, and CNC machining centers. Licensed tradespeople and machining professionals working in production and maintenance environments will find this bit well-matched to high-throughput drilling tasks.

This drill bit is rated for primary use in aluminum and similar non-ferrous and low-alloy materials, consistent with its K, N, and P workpiece material codes. Its parabolic flute design with a 5xD flute-to-diameter ratio supports drilling depths up to 37.15 mm (1.463 inches) without requiring peck cycles in most applications. The straight-cylindrical shank accepts standard drill chucks without adapters. It conforms to DIN 338 standards, making it a direct-fit option wherever that specification is called out on engineering drawings or maintenance sheets.

Key Features

• 3.9 mm (0.1535 inch) diameter with tight tolerance of -0.018 to 0.000 mm for consistent hole sizing
• 130-degree point angle with web thinning for reduced thrust and cleaner entry
• Parabolic flute geometry promotes fast chip removal and reduced heat buildup
• High speed steel construction provides durability across a broad range of drilling speeds
• Bright uncoated finish — suitable for use with cutting fluid or dry in compatible materials
• Meets DIN 338 specification for jobber length drill bits

Compatibility

Designed as a DIN 338 jobber length drill bit for use in standard drill chucks accepting straight-cylindrical shanks. Rated for aluminum and comparable non-ferrous and low-alloy workpiece materials (material codes K, N, P).

Installation Notes

This bit is installed and operated by machinists, maintenance technicians, and metalworking professionals using standard drill chucks. Ensure the chuck is properly tightened and the workpiece is securely fixtured before drilling. Cutting fluid is recommended when drilling metals to extend tool life and maintain hole quality. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.