Hertel C.E05.0913 Aircraft Extension Drill Bit 23/64 in

Product Description

The HERTEL C.E05.0913 is an aircraft extension drill bit engineered for deep-reach drilling applications where a standard-length bit cannot access the workpiece. Built from high-speed steel (HSS) with an oxide finish, this bit measures 23/64 inch (0.3594 inch) in diameter and runs 12 inches in overall length. The 135-degree split point provides self-centering entry without a center punch, reducing walking on hard or curved surfaces. Two spiral flutes, each 3.5 inches long, evacuate chips efficiently through the cut. Right-hand cutting direction and a web-thinned, tapered web configuration reduce thrust and improve penetration in ferrous and non-ferrous metals. Installation is performed by machinists and maintenance technicians working in aerospace, HVAC sheet metal, and structural fabrication environments.

This aircraft extension drill bit is suited for through-hole and clearance-hole drilling in tight or recessed areas - fuselage panels, ductwork flanges, structural channels, and equipment frames where standard jobber-length bits lack the reach. The straight cylindrical shank seats directly in standard drill chucks and right-angle drill attachments without an adapter. General-purpose tool performance rating makes it appropriate across a range of common shop and field metals, including mild steel, aluminum alloy, and stainless sheet.

Key Features

• 12-inch overall length provides extended reach into deep or obstructed bore locations
• 135-degree split point is self-centering, eliminating the need for a center punch on most surfaces
• High-speed steel construction with oxide finish resists heat buildup and surface corrosion during cutting
• Web-thinned tapered web reduces drilling thrust and improves chip flow in deep cuts
• Two spiral flutes (3.5 inches) clear chips continuously to prevent packing and bit seizure
• Straight cylindrical shank accepts standard drill chucks and right-angle adapters without modification

Compatibility

Designed as a general-purpose aircraft extension drill bit for use with standard drill chucks accepting a 23/64-inch straight cylindrical shank in portable electric drills, drill presses, and right-angle drill attachments.

Installation Notes

Secure the shank fully in the chuck before applying power, confirming no runout before drilling. Use cutting fluid appropriate to the workpiece material to extend tool life and control heat at extended lengths. Reduce feed pressure when the flute length approaches full depth to avoid bit deflection or breakage in long-reach applications. Deburr entry and exit holes after drilling in compliance with applicable shop safety and workmanship standards.