Precision Twist Drill 6001319 Letter Q Aircraft Extension Drill

Product Description

The PRECISION TWIST DRILL 6001319 is a Letter Q (0.332 inch diameter) high speed steel aircraft extension drill bit designed for deep-hole drilling applications where standard-length bits cannot reach. Built to Series 502-6 specifications and finished with a black oxide coating, this bit features a 135-degree split point for self-centering starts without a center punch and a web-thinned, tapered web for reduced thrust and cleaner entry. At 6 inches overall length with a 3.4375-inch spiral flute, it provides the reach needed for structural, sheet metal, and airframe drilling work. Licensed tradespeople and aircraft maintenance technicians are the primary installers.

This drill bit is suited for through-hole drilling in metal fabrication, aerospace maintenance, and general industrial applications where extended reach is required. The straight-cylindrical shank accepts standard drill chucks without adapters. The 4xD flute-length-to-diameter ratio and right-hand cutting direction make it appropriate for use in ferrous and non-ferrous metals in both handheld and drill-press setups. It meets NAS 907 Type B standards, making it a recognized choice for aircraft and structural drilling operations where dimensional compliance matters.

Key Features

• 135-degree split point with self-centering geometry eliminates the need for a center punch on most surfaces
• Web-thinned, tapered web reduces cutting resistance and heat buildup during deep drilling
• 6-inch overall length with 3.4375-inch flute provides extended reach for confined or deep-access locations
• Black oxide finish improves lubricity and corrosion resistance compared to bare HSS
• Straight-cylindrical shank at 0.332 inches fits standard keyless and keyed drill chucks directly
• Meets NAS 907 Type B standards for aircraft and structural drilling applications

Compatibility

Designed as an OEM-style general purpose extension drill bit compatible with standard drill chucks accepting a 0.332-inch straight-cylindrical shank, suitable for handheld drills, drill presses, and right-angle drill attachments used in metal drilling applications.

Installation Notes

Installation and use should be performed by qualified machinists, aircraft maintenance technicians, or skilled tradespeople familiar with metal drilling procedures. Power down all equipment and secure the workpiece before changing or seating the bit in the chuck. Ensure the shank is fully seated and the chuck is tightened before operation. Use appropriate cutting fluid or coolant for the material being drilled to extend bit life and maintain dimensional accuracy.