Precision Twist Drill 6001306 Letter L Hss Aircraft Drill

Product Description

The PRECISION TWIST DRILL 6001306 is a Letter L (0.29 inches) high speed steel aircraft extension drill bit engineered for deep-reach drilling in aerospace and industrial applications. Built to Series 502-6 specifications, it features a 135-degree split point that is self-centering and reduces walking on entry without a center punch. The oxide finish provides lubricity and light corrosion resistance during operation. With a 2.9375-inch flute length and a 6-inch overall length, this bit delivers extended reach into cavities and tight structural sections where standard-length bits cannot access. Licensed tradespeople and aerospace maintenance technicians are the primary installers of this tool.

This drill bit is suited for through-hole and structural drilling in aerospace, sheet metal, and general industrial environments where extended reach is required. The 4xD flute-to-diameter ratio supports chip evacuation in deeper bores. Right-hand cutting direction and a straight-cylindrical shank make it compatible with standard drill chucks and extension holders. It is appropriate for use in both hand-held pneumatic drills and drill press setups where workpiece geometry demands a longer bit profile.

Key Features

• 135-degree split point with self-centering geometry reduces walking and eliminates need for a center punch on most materials
• Web-thinned tapered web configuration improves penetration and reduces thrust force
• Oxide finish provides lubricity and light corrosion resistance during drilling operations
• 6-inch overall length with 2.9375-inch flute length delivers extended reach into deep cavities
• Two-flute spiral design promotes efficient chip evacuation in deeper bores
• Conforms to NAS 907 Type B standards for aerospace-grade drill bit performance

Compatibility

Designed for use in standard drill chucks and extension holders accepting a 0.29-inch straight-cylindrical shank; rated for general-purpose aerospace and industrial drilling applications per NAS 907 Type B.

Installation Notes

This tool is typically used by aerospace maintenance technicians, machinists, and industrial trades working with structural materials. Secure the shank fully in the chuck before operation and verify chuck key is removed before starting the drill. Use appropriate cutting fluid or lubricant for the workpiece material to extend bit life and improve cut quality. Inspect the split point for wear or chipping before each use, as a damaged point will reduce centering accuracy and increase the risk of bit breakage.