Guhring 9003290050000 Cobalt Stub Drill Bit 5mm

Product Description

The GUHRING 9003290050000 is a cobalt (M35 grade) stub-length drill bit designed for high-performance drilling in tough workpiece materials. Built to DIN 1897 standards, it features a 5.00 mm diameter, a 130-degree point angle with cone relief geometry, and an oxide finish. The overall length is 62.00 mm (2.4409 inches), with a 26.00 mm (1.0236 inch) flute length. Web-thinned construction reduces thrust at entry and improves chip evacuation. This bit is suited for machinists, tool and die professionals, and maintenance technicians working with harder materials where standard HSS tooling falls short.

Designed for screw-machine and stub-length drilling applications, this bit performs reliably in steel, stainless steel, cast iron, and high-temperature alloys. The shorter flute-to-diameter ratio (3xD max drilling depth) makes it well suited for CNC machining centers, drill presses, and manual lathes where rigidity and reduced deflection are priorities. The straight cylindrical shank fits standard drill chucks and collet holders accepting 5.00 mm shanks.

Key Features

• M35 cobalt steel construction for heat and wear resistance in hard materials
• 130-degree cone relief point for positive engagement on steel and stainless steel
• Web-thinned, tapered web configuration reduces cutting thrust and improves hole entry
• Oxide coating provides corrosion resistance and mild lubricity
• DIN 1897 stub-length geometry delivers increased rigidity and reduced deflection
• Right-hand cutting, regular spiral flute for efficient chip removal

Compatibility

Designed as a DIN 1897-compliant stub-length drill bit suitable for use in steel, stainless steel, cast iron, and high-temperature alloys. Compatible with standard drill chucks and collet holders accepting a 5.00 mm straight cylindrical shank.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians. Ensure the spindle is fully stopped and the machine is powered down before inserting or removing the bit from the chuck or collet. Verify chuck or collet runout is within acceptable tolerance before use, as excessive runout will accelerate wear on cobalt tooling. Always apply appropriate cutting fluid when drilling stainless steel or high-temperature alloys to manage heat buildup.