Guhring 9005490025500 Jobber Drill Bit 2.55mm Hss

Product Description

The GUHRING 9005490025500 is a jobber-length twist drill bit designed for precision hole-making in a range of metalworking and light industrial applications. Manufactured from high-speed steel (HSS) with a bright, uncoated finish, this bit measures 2.55 mm (0.1004 inches) in diameter and features a parabolic flute geometry that promotes efficient chip evacuation and reduces heat buildup during drilling. The 130-degree split point with web thinning allows for faster engagement and reduces the axial force required to start the hole, minimizing walking on entry. It is sized to a DIN 338 standard and suited for use by machinists, maintenance technicians, and fabricators working with aluminum, non-ferrous metals, and general-purpose workpieces.

This drill bit is primarily rated for aluminum and non-ferrous materials (material codes K, N, P), making it a practical choice for production drilling, prototype work, and precision maintenance tasks. The parabolic flute design with a 5xD flute-to-diameter ratio supports deeper cuts relative to bit diameter without excessive chip packing. The straight-cylindrical shank fits standard drill chucks and CNC toolholders without modification. Maximum drilling depth is rated at 26.18 mm (1.031 inches), and the overall length of 57 mm (2.25 inches) keeps the tool compact for controlled setups.

Key Features

• 2.55 mm (0.1004 inches) diameter, DIN 338 jobber-length standard
• 130-degree drill point with web thinning for fast, accurate entry
• Parabolic flute geometry for efficient chip evacuation and reduced heat
• High-speed steel construction with bright, uncoated finish
• Straight-cylindrical shank fits standard chucks and CNC holders
• Right-hand cut, 2-flute configuration — no coolant-through required

Compatibility

Designed as a DIN 338-compliant jobber-length drill bit suitable for use in standard drill chucks, drill presses, and CNC machining centers that accept a 0.1004-inch straight-cylindrical shank. Rated for aluminum, non-ferrous metals, and general-purpose materials per material codes K, N, and P.

Installation Notes

Machinists and maintenance technicians should verify chuck capacity before installing this small-diameter bit, as runout at the spindle can cause bit deflection or breakage at diameters under 3 mm. Secure the shank fully in the chuck and use appropriate cutting fluid for materials that generate heat. Inspect the cutting edges before use and replace the bit if chipping or wear is visible. Always bring the spindle to a complete stop before changing tooling.