Hertel C.E07.0295 Aircraft Extension Drill Bit 32 Cobalt

Product Description

The HERTEL C.E07.0295 is an aircraft extension drill bit designed for deep-reach drilling applications where a standard-length bit cannot access the work area. Built from cobalt steel with a straw finish, this bit handles high-heat drilling in tough materials including stainless steel, titanium, and hardened alloys. It carries a wire gauge size of 32, which corresponds to a decimal diameter of 0.1160 inches, and measures 12 inches in overall length. The 135-degree split point is self-centering and reduces the need for a center punch on most surfaces. Installed by machinists, aircraft maintenance technicians, and industrial fabricators, this bit is suited for precision work in confined or extended-reach setups.

This bit is built for aircraft assembly, airframe maintenance, and industrial fabrication environments where long-reach drilling into structural materials is required. The cobalt construction provides thermal resistance during sustained drilling cycles in hard metals. The 1.625-inch spiral flute length efficiently clears chips during the cut. It is appropriate for use in handheld pneumatic drills, drill presses, and CNC setups where a straight cylindrical shank is accepted. Right-hand cutting direction is standard for conventional drilling equipment.

Key Features

• Cobalt steel construction resists heat buildup during drilling in hard and abrasive materials
• 135-degree split point is self-centering and reduces walking on entry
• 12-inch overall length provides extended reach into deep or confined structures
• Web-thinned tapered web reduces thrust load and improves cutting efficiency
• Straw finish indicates cobalt alloy heat treatment for enhanced hardness
• Meets NAS 907 standard for aircraft drill bit performance

Compatibility

Designed as an OEM-style replacement or direct-use aircraft extension drill bit compatible with standard straight cylindrical shank drill chucks accepting a 0.1160-inch shank diameter.

Installation Notes

This bit is installed and operated by qualified machinists or aircraft maintenance technicians following applicable shop and aviation maintenance procedures. Secure the shank firmly in the drill chuck before use and confirm the chuck capacity accommodates a 0.1160-inch diameter shank. Use appropriate cutting fluid or lubricant when drilling hardened metals to extend bit life and maintain dimensional accuracy. Inspect the cutting edges and split point for wear or chipping before each use.