Precision Twist Drill 6001475 Aircraft Extension Drill Bit

Product Description

The PRECISION TWIST DRILL 6001475 is a high speed steel aircraft extension drill bit designed for deep-hole drilling in aerospace and industrial applications. Built to Series 501-6 specifications, it features a 135-degree split point that is self-centering, reducing the need for a center punch on most materials. The bit carries an oxide finish for basic lubrication retention and corrosion resistance. At 6 inches overall length with a 2.625-inch spiral flute, it provides the reach required in confined or deep-access drilling scenarios that standard-length bits cannot accommodate. Licensed HVAC techs, machinists, and aerospace maintenance professionals rely on this type of bit for precision work in sheet metal, aluminum, and mild steel.

This drill bit is suited for general-purpose drilling in residential and commercial maintenance, aircraft sheet metal work, and fabrication environments. Its 0.221-inch diameter corresponds to wire gauge size number 2, making it a standard choice when working to wire-gauge tolerances in tight clearance or deep-reach situations. The right-hand cutting direction and two-flute spiral configuration support efficient chip evacuation during extended drilling passes. Web thinning with a tapered web configuration reduces thrust requirements, which is particularly valuable when drilling by hand or with lower-torque pneumatic tools common in aircraft maintenance.

Key Features

• 135-degree split point with self-centering geometry reduces or eliminates center-punching on most materials
• High speed steel construction provides durability across a range of metals including aluminum, mild steel, and sheet metal
• Oxide finish aids in lubrication retention and provides basic corrosion resistance
• 6-inch overall length delivers extended reach for deep-hole and confined-access drilling
• Web-thinned, tapered web reduces axial thrust and improves cutting efficiency
• Meets NAS 907 Type B standards for aircraft extension drill applications

Compatibility

Designed as an OEM-style general purpose aircraft extension drill bit for use in standard straight-shank drill chucks accepting a 0.221-inch diameter shank, conforming to NAS 907 Type B requirements.

Installation Notes

This bit is installed and used by machinists, aircraft maintenance technicians, and industrial maintenance professionals. Secure the straight-cylindrical shank firmly in a keyed or keyless chuck before use to prevent slippage under torque. Ensure the workpiece is clamped or fixtured before drilling to avoid movement. Use appropriate cutting fluid or lubricant for the base material to extend bit life, particularly when drilling steel. Follow applicable workplace safety standards and wear appropriate eye protection during all drilling operations.