Precision Twist Drill 6001349 Aircraft Extension Drill Bit

Product Description

The PRECISION TWIST DRILL 6001349 is a high speed steel aircraft extension drill bit designed for deep-reach drilling applications in metal and aerospace-grade materials. Built to Series 501-6 specifications, it carries a 135-degree split point that self-centers on contact, reducing the need for a center punch and minimizing walking on curved or hard surfaces. The 0.196-inch diameter corresponds to Wire Size 9 and matches the straight-cylindrical shank diameter, keeping the tool concentric through its full 6-inch overall length. The oxide finish provides mild corrosion resistance during storage and use. Licensed HVAC sheet-metal technicians, aircraft maintenance mechanics, and industrial pipefitters commonly reach for this bit when standard-length drills cannot access recessed fastener locations.

This bit is suited for right-hand spiral flute drilling in ferrous metals, aluminum, and structural sheet stock where extended reach is required. The 2.4375-inch flute length, combined with the 4xD flute-to-diameter ratio, supports chip evacuation during through-hole work in moderate-depth applications. The two-flute, web-thinned, tapered-web geometry reduces thrust load, making it practical for hand-held pneumatic drills and drill presses alike. It is categorized as a general-purpose tool under NAS 907 Type B standards, meaning it meets established aerospace dimensional and performance criteria. Sheet metal and structural trades will find it a reliable addition to an extension-drill kit.

Key Features

• 135-degree split point is self-centering, eliminating pilot dimpling on most metal surfaces
• Web-thinned, tapered-web construction reduces drilling thrust and extends tool life
• 6-inch overall length provides extended reach into confined or recessed areas
• High speed steel construction handles ferrous metals, aluminum, and structural alloys
• Oxide finish offers light corrosion protection for storage and field use
• Meets NAS 907 Type B dimensional and performance standards

Compatibility

Designed as an OEM-style general-purpose aircraft extension drill bit conforming to NAS 907 Type B, suitable for use in standard 3/8-inch or larger drill chucks accepting a 0.196-inch straight-cylindrical shank.

Installation Notes

Installation of this drill bit is performed by machinists, sheet metal technicians, and aircraft maintenance mechanics using hand-held pneumatic drills or drill presses. Secure the straight-cylindrical shank fully in the chuck before operation and verify chuck key is removed prior to powering the tool. Use appropriate cutting fluid for ferrous materials to reduce heat buildup and extend bit life. Follow applicable shop safety standards and wear eye protection whenever drilling metal.