Precision Twist Drill 6001333 Aircraft Extension Drill

Product Description

The PRECISION TWIST DRILL 6001333 is a high speed steel aircraft extension drill bit designed for deep-reach drilling applications where standard-length bits cannot access the work area. Ground to a 135-degree split point with web thinning, it starts on contact without a center punch and cuts through metal cleanly in a single pass. The 11/64-inch (0.1719-inch) diameter and 2-1/8-inch flute length make it well suited for sheet metal, structural steel, and aluminum work common in aerospace and industrial maintenance. An oxide finish provides basic corrosion resistance and helps retain cutting lubricant during operation. This bit is installed and used by aircraft maintenance technicians, industrial maintenance mechanics, and metalworking professionals.

This drill bit is built for aircraft and general metalworking applications where extended reach is required. The 12-inch overall length allows technicians to reach into fuselage panels, machinery housings, and structural cavities that a jobber-length bit cannot access. Its right-hand spiral flute geometry efficiently evacuates chips during through-drilling. The series 500-12 designation identifies it as part of a standardized extension drill line conforming to NAS 907 Type B standards, making it suitable for use in regulated maintenance environments.

Key Features

• 135-degree split point with web thinning for self-centering starts without a punch
• 11/64-inch (0.1719-inch) diameter straight-cylindrical shank fits standard drill chucks
• 12-inch overall length provides extended reach into deep or restricted work areas
• High speed steel construction handles steel, aluminum, and other common metals
• Right-hand spiral flutes with 4xD flute-to-diameter ratio for efficient chip removal
• Oxide finish aids lubrication retention during cutting
• Conforms to NAS 907 Type B standards

Compatibility

Designed as a general-purpose aircraft extension drill bit conforming to NAS 907 Type B, compatible with any standard drill motor or press accepting an 11/64-inch straight-cylindrical shank.

Installation Notes

Use in a variable-speed drill motor or drill press with appropriate cutting fluid for the base metal being drilled. Secure the workpiece firmly before drilling to prevent movement that can break small-diameter bits. Inspect the cutting edges before use and replace any bit showing chipping or wear. Follow applicable facility safety and maintenance procedures when drilling in aircraft or industrial structures.