Precision Twist Drill 6001427 Aircraft Extension Drill Bit

Product Description

The PRECISION TWIST DRILL 6001427 is a high speed steel aircraft extension drill bit engineered for precision hole-making in metal fabrication, aerospace, and maintenance applications. Built to Series 501-6 specifications, it carries a wire size of 38 (0.1015 inches decimal), a 135-degree split point for self-centering entry, and an oxide finish that provides mild lubricity and corrosion resistance. The 1.4375-inch spiral flute length and straight-cylindrical shank make it well-suited for controlled, accurate drilling where standard-length bits cannot reach. Licensed HVAC technicians, aircraft maintenance professionals, and sheet metal workers routinely specify this drill for close-tolerance applications.

This bit is designed for general-purpose drilling in metal substrates including steel, aluminum, and similar materials. The aircraft extension design provides additional reach beyond a standard jobber-length drill, making it useful in deep-cavity installations, structural repairs, and confined-space fastener hole preparation. The right-hand cutting direction and two-flute spiral geometry ensure consistent chip evacuation during use. Its NAS 907 Type B compliance makes it a recognized choice for aerospace and defense maintenance tasks where standardized tooling is required.

Key Features

• 135-degree split point for self-centering drilling without a center punch
• Wire size 38 (0.1015 inches) straight-cylindrical shank for standard chuck compatibility
• High speed steel construction handles a broad range of metal substrates
• Oxide finish provides mild lubrication and resistance to corrosion
• Web-thinned tapered web reduces cutting resistance and heat buildup
• Meets NAS 907 Type B standard for aerospace and industrial applications

Compatibility

Designed as an OEM-style replacement or general-use drill bit compatible with standard 3-jaw drill chucks accepting a 0.1015-inch straight-cylindrical shank, suitable for benchtop drill presses, hand drills, and magnetic base drills used in metal fabrication and aircraft maintenance.

Installation Notes

Installation of this drill bit should be performed by a qualified machinist, aircraft mechanic, or sheet metal technician familiar with cutting speed and feed rate selection for the target material. Secure the shank fully in the chuck and verify concentricity before drilling. Always use appropriate cutting fluid when drilling steel to extend bit life and reduce heat. Follow applicable shop safety standards and wear proper eye protection during all drilling operations.