Guhring 9003050034500 Jobber Drill Bit No.29 Cobalt

Product Description

The GUHRING 9003050034500 is a cobalt jobber length drill bit designed for general-purpose metal drilling in demanding production and maintenance environments. Built to DIN 338 standards, it carries a No. 29 wire gauge size with a decimal diameter of 0.1358 inches. The 118-degree standard point angle delivers reliable centering on flat stock without a pilot hole. An oxide coating reduces friction and extends tool life in abrasive materials. With an overall length of 70 millimeters and a spiral flute, this bit is suited for repeated use in hand-held drills, drill presses, and CNC setups where consistent hole quality matters. Licensed machinists, tool-and-die technicians, and maintenance mechanics are the primary installers.

This drill bit is rated for use in cast iron and steel workpieces, covering material codes K and P. The straight-cylindrical shank fits standard three-jaw chucks without adapters. The regular spiral flute and web-thinned point configuration reduce thrust requirements and improve chip evacuation in deep-entry drilling. With a maximum drilling depth of 1.332 inches (33.83 millimeters) and a flute-to-diameter ratio of 5xD, the bit handles typical through-hole and blind-hole applications found in fabrication shops, maintenance bays, and light manufacturing cells.

Key Features

• Cobalt construction withstands elevated heat generated when drilling hardened steel and cast iron
• Oxide coating reduces friction and resists built-up edge on ferrous materials
• 118-degree standard point angle for general-purpose entry on flat and curved stock
• Web-thinned, tapered web reduces drilling thrust and improves chip flow
• DIN 338 specification ensures dimensional consistency and interchangeability
• Right-hand spiral flute with 2-flute configuration for clean chip evacuation

Compatibility

Designed as an OEM-style replacement or standard supply drill bit for general-purpose jobber length applications in cast iron and steel, per DIN 338 specification.

Installation Notes

Install this bit into a properly sized three-jaw chuck or collet, ensuring the straight-cylindrical shank is fully seated before tightening. Power down the drill press or de-energize the CNC spindle before changing tooling. Use appropriate cutting fluid or coolant on steel workpieces to manage heat, noting that this bit does not support through-spindle coolant delivery. Verify workpiece is securely clamped before beginning the drilling cycle.