Guhring 9006590041500 Stub Length Cobalt Drill Bit

Product Description

The GUHRING 9006590041500 is a stub-length (screw machine length) cobalt drill bit designed for demanding metal cutting applications. Built to DIN 1897 standards, it features an M35 cobalt steel construction with a Titanium Nitride (TiN) coating on the drill tip, which extends tool life when drilling hard and abrasive materials. The 130-degree split point with web thinning reduces thrust and improves centering without a pilot hole. At 4.15 mm (0.1634 inches) in diameter and 55 mm (2.1654 inches) overall length, this bit is sized for precision work in tight spaces. It is well-suited for use by machinists, tool-and-die shops, and maintenance technicians working with high-strength materials.

This drill bit is rated for primary use in titanium alloy workpieces and is appropriate for other hard metals encountered in aerospace, medical device, and general precision machining environments. The stub-length body provides added rigidity over standard jobber-length bits, reducing deflection during drilling. The straight-cylindrical shank accepts standard drill chucks and collet holders. With a 3xD flute-to-diameter ratio and a maximum drilling depth of 22 mm (0.8661 inches), this bit is intended for shallow, accurate holes in production and job-shop settings.

Key Features

• M35 cobalt construction for extended tool life in hard and abrasive metals
• TiN-coated drill tip reduces wear and improves surface finish at entry
• 130-degree point angle with web thinning for self-centering and reduced feed force
• Stub (DIN 1897) length adds rigidity and minimizes deflection
• 2-flute spiral configuration with regular spiral and tapered web for efficient chip evacuation
• Diameter tolerance of +0.000 to -0.018 mm for consistent, accurate hole sizing

Compatibility

Designed for use in standard drill chucks and collet holders accepting a 4.15 mm straight-cylindrical shank. Suitable as an OEM-style replacement or production consumable for any setup requiring a DIN 1897 stub-length cobalt drill bit in the 0.1500 to 0.2000 inch (3.50 to 5.00 mm) size range.

Installation Notes

This bit is installed by machinists or toolroom technicians in drill presses, CNC machining centers, or hand-held power drills with compatible chucks. Ensure the machine spindle is fully stopped and locked out before changing tooling. Apply appropriate cutting fluid when drilling titanium alloy or other high-strength materials to manage heat and extend tool life. Do not exceed the maximum drilling depth of 0.8661 inches without retracting to clear chips.