Guhring 9003050083000 Cobalt Jobber Drill 8.30mm

Product Description

The GUHRING 9003050083000 is a cobalt jobber-length drill bit designed for general-purpose drilling in ferrous materials. Built to DIN 338 standards, this straight-shank bit measures 8.30 mm in diameter with a 118-degree cone relief point and a web-thinned tip for easier penetration and reduced thrust. The overall length is 117.00 mm, with a flute length of 75.00 mm and a shank length of 42.00 mm. The bright, uncoated finish is suited for use without coolant in moderate-duty drilling applications. Licensed tradespeople and machinists in fabrication, mechanical, and HVAC sheet-metal work will find this a reliable general-duty bit for production or service use.

This bit is intended for drilling cast iron and steel in both residential and commercial trade environments. The 5xD flute-to-diameter ratio and regular spiral geometry make it well-suited for through-hole drilling in structural steel, pipe, and plate stock. Typical applications include mechanical contracting, HVAC fabrication, plumbing rough-in work, and general metalworking where a reliable, mid-size cobalt bit is needed without a coated or specialty tool.

Key Features

• Cobalt construction for improved heat resistance over standard high-speed steel bits
• 118-degree cone relief point with web thinning for reduced entry thrust and cleaner starts
• DIN 338 standard jobber length provides a good balance of reach and rigidity
• Straight-cylindrical shank fits standard drill chucks and driver holders
• Right-hand cutting, regular spiral flute for efficient chip evacuation in steel and cast iron
• Bright, uncoated finish compatible with cutting fluid use when needed

Compatibility

Designed as a general-purpose cobalt jobber drill compatible with standard drill chucks accepting an 8.30 mm straight-cylindrical shank, conforming to DIN 338 tolerances. Suitable for drilling cast iron and steel workpieces.

Installation Notes

Installation and use of this drill bit should be performed by qualified tradespeople familiar with metal drilling practices. Secure the workpiece firmly before drilling and ensure the drill chuck is fully tightened to the shank diameter. Applying cutting fluid is recommended when drilling harder steel grades to extend tool life. Inspect the bit for wear or damage before each use and replace if the cutting edges show signs of chipping or heat discoloration.