Precision Twist Drill 6001317 Hss Aircraft Extension Drill Bit

Product Description

The PRECISION TWIST DRILL 6001317 is a high speed steel aircraft extension drill bit designed for precision drilling in tight-clearance and deep-reach applications. Sized to wire gauge 54 (0.055 inches decimal), it features a 135-degree split point for accurate starting without center-punching and a web-thinned, tapered web construction that reduces feed force. The spiral flute geometry and right-hand cutting direction promote efficient chip evacuation. At 6 inches overall length with a 7/8-inch flute length, this bit is built for aircraft-style extended-reach work and is typically installed by aerospace maintenance technicians, machinists, and industrial MRO professionals.

This drill bit is suited for general-purpose drilling in metal, plastics, and composite materials where an extended-length tool is required to reach recessed features or work through thick stock. The straight-cylindrical shank (0.055 inches diameter) fits standard drill chucks without adapters. Its oxide finish provides a base level of corrosion resistance and reduces friction during drilling. The Series 501-6 designation follows NAS 907 Type B standards, making it appropriate for applications requiring compliance with that aerospace specification.

Key Features

• Wire size 54 (0.055 inches) diameter for fine, precise bore work
• 135-degree split point promotes self-starting and reduces walking
• Web-thinned tapered web lowers thrust requirements during drilling
• 6-inch overall length provides extended reach for deep or obstructed access
• Right-hand spiral flute for efficient chip removal
• Meets NAS 907 Type B standard

Compatibility

Designed as a general-purpose replacement or service drill bit for use in standard 3-jaw drill chucks accepting a 0.055-inch straight-cylindrical shank, in accordance with NAS 907 Type B tooling specifications.

Installation Notes

This drill bit is intended for use by machinists, aerospace maintenance technicians, and qualified MRO personnel. Secure the straight-cylindrical shank firmly in a drill chuck rated for the intended spindle speed before operation. Ensure the workpiece is properly fixtured to prevent movement during drilling. Inspect the cutting edges for wear or damage before each use and replace the bit if chipping or dulling is observed.