Guhring 9003290026500 Stub Drill Bit 0.1043 in Cobalt

Product Description

The GUHRING 9003290026500 is a screw machine length (stub) cobalt drill bit designed for precision drilling in demanding materials. Built to DIN 1897 standards, this Series 329 bit measures 0.1043 inches (2.65 mm) in diameter with an overall length of 1.6929 inches (43 mm). The M35 cobalt steel construction and oxide tip coating provide heat resistance and extended tool life when cutting through tough workpiece materials such as titanium alloy. The 130-degree point angle and web-thinned, tapered web geometry improve centering and reduce thrust force during entry. Licensed HVAC techs, machinists, and metal fabricators working with close-tolerance bores rely on bits like this for consistent, repeatable results.

This stub-length drill bit is suited for applications where a shorter flute length improves rigidity and reduces deflection. The 0.5512-inch (14 mm) flute length and 3xD flute-to-diameter ratio make it well-matched for shallow-depth holes in production and job-shop environments. Primary recommended workpiece material is titanium alloy, though the cobalt M35 grade is broadly used on stainless steels and other high-hardness alloys. Right-hand cut with a straight-cylindrical shank for direct chuck mounting.

Key Features

• M35 cobalt tool steel with oxide tip coating for heat and wear resistance
• 130-degree drill point angle with web-thinned, tapered web for reduced entry thrust
• DIN 1897 stub length for improved rigidity over jobber-length bits
• Straight-cylindrical shank fits standard drill chucks directly
• 2-flute regular spiral design for efficient chip evacuation
• Diameter tolerance of +0.000 to -0.014 mm for close-tolerance bore work

Compatibility

Designed as a stub-length replacement or production drill for applications requiring a 2.65 mm (0.1043 inch) diameter hole in titanium alloy and other high-hardness metals, conforming to DIN 1897 specification.

Installation Notes

Install in a standard drill press, CNC machining center, or hand drill with a compatible chuck sized for a 2.65 mm straight-cylindrical shank. Ensure the workpiece is securely fixtured before drilling. Use appropriate cutting fluid or coolant for titanium alloy and similar materials to manage heat buildup. Inspect the cutting edge before each use and replace bits that show chipping or wear to maintain hole-diameter accuracy.