Hertel C.E06.0345 Aircraft Drill Bit No. 29 Cobalt

Product Description

The HERTEL C.E06.0345 is a cobalt aircraft extension drill bit sized at No. 29 (0.1360 inches decimal equivalent) with a 135-degree split point and straw finish. Designed for drilling through hard and tough materials in aerospace and industrial applications, this bit features a web-thinned, tapered web construction that reduces thrust and improves chip evacuation. The self-centering split point eliminates the need for a center punch in most setups. Overall length is 6 inches, making it suitable for reaching into confined or recessed areas. Licensed tradespeople and machinist technicians use this bit for precision hole-making in ferrous and non-ferrous metals.

This aircraft extension drill bit is suited for production and maintenance drilling in aerospace, automotive, and general industrial settings where extended reach and heat resistance are required. The cobalt construction maintains hardness at elevated cutting temperatures, making it appropriate for stainless steel, high-nickel alloys, and hardened steels. It is sold individually and meets NAS 907 standards, making it appropriate for regulated fabrication and repair environments.

Key Features

• No. 29 wire size with 0.1360 inch decimal diameter for precision fitment
• 135-degree split point with self-centering geometry eliminates center-punch step
• Cobalt tool material resists heat buildup during high-speed drilling of hard metals
• Straw finish indicates cobalt content and provides mild lubricity
• Web-thinned tapered web reduces cutting resistance and improves chip flow
• 6 inch overall length provides extended reach into deep or recessed bore locations
• Meets NAS 907 standard for aerospace drilling applications

Compatibility

Designed for general-purpose drilling in aerospace, industrial, and maintenance applications requiring an extended-length No. 29 cobalt drill bit meeting NAS 907 standards. Confirm shank and chuck compatibility before use.

Installation Notes

This drill bit is installed and operated by machinists, aircraft maintenance technicians, and industrial trade professionals using standard drill presses, hand drills, or CNC equipment with a compatible straight-cylindrical chuck. Ensure the workpiece is properly secured and the drill is running at the correct speed for the material being cut before beginning. Inspect the cutting edges for wear or chipping before each use and replace if the point geometry is compromised. Use appropriate cutting fluid for hard or heat-sensitive materials to extend tool life and maintain hole quality.