Hertel C.E06.0279 Aircraft Extension Drill Bit 35 Cobalt

Product Description

The HERTEL C.E06.0279 is a cobalt aircraft extension drill bit designed for drilling in hard and abrasive materials where standard high-speed steel bits fall short. Built to wire gauge size 35 (0.1100 inches decimal), it features a 135-degree split point for self-centering starts without a center punch. The straw finish indicates a heat-treated cobalt construction that resists wear and maintains cutting edge integrity at elevated temperatures. At 6 inches overall length with a 1.5-inch spiral flute, this bit provides the extended reach required for airframe and structural drilling applications. It is installed by aerospace technicians, maintenance mechanics, and metalworking tradespeople working on hard-to-reach fastener locations.

This drill bit is suited for production and maintenance drilling in aerospace, automotive, and industrial metalworking environments. The extended length makes it practical for drilling through structural members, stacked sheet metal, or recessed locations where a jobber-length bit cannot reach. The right-hand spiral flute and web-thinned, tapered web geometry promote chip evacuation and reduce thrust during drilling. General-purpose cobalt construction handles stainless steel, titanium alloys, cast iron, and other work-hardening materials commonly encountered in structural and airframe work.

Key Features

• Wire gauge size 35 (0.1100 inches) with matching straight-cylindrical shank diameter for consistent chuck fit
• 135-degree split point with self-centering tip reduces walking and eliminates most center-punch steps
• Cobalt tool material with straw finish for improved heat resistance and edge retention in hard metals
• Web-thinned, tapered web reduces cutting resistance and lowers required feed force
• 1.5-inch spiral flute with right-hand cutting direction for efficient chip clearance
• Meets NAS 907 standard for aircraft drilling applications

Compatibility

Designed as an OEM-style aircraft extension drill bit suitable for use in standard straight-cylindrical shank drill chucks and general-purpose metalworking and aerospace drilling applications.

Installation Notes

This bit is installed by machinists, aerospace mechanics, and metalworking technicians using standard keyless or keyed drill chucks rated for the shank diameter. Secure the workpiece before drilling and use cutting fluid appropriate for cobalt bits when working with stainless steel or titanium to extend tool life. Ensure drill speed (RPM) is set to a rate appropriate for the material and bit diameter — excessive speed in hard materials will shorten bit life. Inspect the cutting edges before each use and replace if chipping or dulling is observed.