Precision Twist Drill 6001425 Aircraft Drill Bit 0.073 in

Product Description

The PRECISION TWIST DRILL 6001425 is a Series 501-12 aircraft extension drill bit designed for precision drilling in aerospace and general industrial applications. Built from high speed steel with an oxide finish, this bit measures 0.073 inches in diameter (Wire Size 49) and features a 135-degree split point that is self-centering for accurate hole starts without a center punch. The two-flute spiral design with a tapered web and web-thinned geometry reduces thrust and improves chip evacuation. At 12 inches overall length with a 1-inch flute length, it extends reach into deep or confined workpieces while maintaining rigidity. Licensed HVAC techs, machinists, and aircraft maintenance professionals rely on this geometry for right-hand cutting in tight-access drilling scenarios.

This drill bit is suited for aircraft structural drilling, sheet metal work, and general-purpose drilling in confined spaces where standard-length bits cannot reach. The extended 12-inch overall length combined with the compact 0.073-inch diameter makes it appropriate for drilling pilot holes, rivet holes, and access holes in aircraft fuselage panels, brackets, and bulkheads. It is also applicable in industrial maintenance and fabrication environments where extended reach and a self-centering point are required for accurate, repeatable hole placement.

Key Features

• 135-degree split point with self-centering geometry eliminates the need for a center punch on most materials
• Web-thinned, tapered web construction reduces drilling thrust and improves chip clearing
• High speed steel construction provides durability across a wide range of metals and composite materials
• Oxide finish improves lubricity and surface hardness for extended service life
• 12-inch overall length provides extended reach into deep or restricted work areas
• Meets NAS 907 Type B standards for aircraft drilling applications

Compatibility

Designed as a general-purpose aircraft extension drill bit conforming to NAS 907 Type B standards, suitable for use with standard drill chucks accepting a 0.073-inch straight-cylindrical shank.

Installation Notes

This bit is installed and operated by machinists, aircraft maintenance technicians, and trained fabricators. Secure the straight-cylindrical shank fully in the drill chuck before operation and confirm runout is within acceptable limits. Always wear appropriate eye protection and secure the workpiece before drilling. Reduce feed pressure when breaking through material to prevent bit deflection or workpiece damage.