Hertel C.E05.0238 Aircraft Extension Drill Bit 3/32 in Hss

Product Description

The HERTEL C.E05.0238 is an aircraft extension drill bit designed for drilling in hard-to-reach locations where a standard-length bit cannot access the work surface. Built from high-speed steel with an oxide finish, it measures 12 inches in overall length and carries a 135-degree split point that self-centers on contact, reducing the need for a center punch on flat or curved stock. The 3/32-inch diameter and two-flute spiral configuration channel chips efficiently out of deep holes. Machinists, aircraft maintenance technicians, HVAC fabricators, and sheet metal workers reach for this bit when clearance depth is the limiting factor on a job.

This bit fits into standard straight-cylindrical shank chucks and is suited for general-purpose drilling in steel, aluminum, sheet metal, and similar materials. The tapered web with web thinning reduces thrust force at the tip, which matters when working with thinner gauge material common in ductwork, panels, and structural skin assemblies. The 1.25-inch flute length handles the chip-clearing demands typical of shallow-to-moderate penetration work at this diameter. Right-hand cutting direction is compatible with all standard drill motors and drill presses.

Key Features

• 12-inch overall length provides extended reach into deep or obstructed work areas
• 135-degree split point self-centers on contact, minimizing drill walk without a punch
• High-speed steel construction with oxide finish for heat and wear resistance
• Two-flute spiral design with web-thinned tapered web reduces cutting thrust
• 3/32-inch (0.0938 inch) diameter with matching straight-cylindrical shank fits standard chucks
• Right-hand cut, general-purpose rating suitable for steel, aluminum, and sheet metal

Compatibility

Designed for use in any standard drill chuck or drill press accepting a straight-cylindrical shank at 3/32-inch diameter. Suitable for general-purpose drilling applications in aircraft maintenance, HVAC fabrication, sheet metal work, and related trades.

Installation Notes

Secure the bit fully in the chuck before operation and verify chuck key is removed before starting the drill motor. Use appropriate cutting fluid or lubricant when drilling steel to extend bit life and reduce heat buildup. Wear eye protection in compliance with applicable shop safety standards. Inspect the cutting edges and web for wear or chipping before each use and replace if tip geometry is compromised.