Precision Twist Drill 6001216 Aircraft Extension Drill Bit

Product Description

The PRECISION TWIST DRILL 6001216 is a 7/16 inch high speed steel aircraft extension drill bit designed for deep-reach drilling applications where standard-length bits cannot access the work zone. It features a 135-degree split point that reduces walking and eliminates the need for a center punch on most materials. The spiral flute geometry and oxide finish help with chip evacuation and mild lubrication retention during cutting. With a 4-1/16 inch flute length and 6 inch overall length, this bit delivers extended reach without sacrificing rigidity. It is suited for use by aviation maintenance technicians, metalworking tradespeople, and industrial maintenance mechanics.

This drill bit is built for general-purpose metal drilling in applications requiring extended reach, such as drilling through structural airframe members, deep castings, machinery frames, and fabricated assemblies. The straight-cylindrical shank accommodates standard drill chucks. The Series 500-6 designation indicates this bit conforms to extended-length aircraft drill standards, making it appropriate for MRO shops, aerospace fabrication, and industrial maintenance environments where access is restricted and hole location accuracy is critical.

Key Features

• 135-degree split point for self-centering entry and reduced thrust force
• High speed steel construction for durability across a range of ferrous and non-ferrous materials
• 4-1/16 inch flute length (4.0625 inches) provides extended reach for deep or obstructed holes
• Oxide finish aids in lubrication retention and mild corrosion resistance during storage and use
• Web-thinned tapered web reduces cutting resistance and improves chip flow
• Right-hand cutting direction, 2 spiral flutes, straight-cylindrical shank fits standard chucks
• Meets NAS 907 Type B standard for aircraft extension drills

Compatibility

Designed as an OEM-style aircraft extension drill bit suitable for use in standard drill chucks accepting a 7/16 inch straight-cylindrical shank, conforming to NAS 907 Type B specifications for extended-length aircraft drilling applications.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists, aviation maintenance technicians, or industrial tradespeople familiar with metal drilling procedures. Secure the workpiece fully before drilling and ensure the drill chuck is tightened properly to prevent slippage. Use appropriate cutting fluid for the material being drilled to extend bit life and improve hole quality. Follow applicable shop safety standards and wear eye protection at all times during operation.