Precision Twist Drill 6001326 No. 57 Hss Aircraft Drill

Product Description

The PRECISION TWIST DRILL 6001326 is a No. 57 wire gauge aircraft extension drill bit manufactured from high speed steel (HSS) with an oxide finish. Designed for drilling in tight or extended-reach applications, this bit features a 135-degree split point with web thinning for reduced thrust and self-starting entry without a center punch. The straight cylindrical shank measures 0.043 inches in diameter, matching the cutting diameter, and the spiral flute length runs 0.75 inches. Weighing approximately 0.04 pounds, this bit is built for precision work in aerospace, sheet metal, and general mechanical trade applications.

This drill bit is suited for use in hand-held drills, drill presses, and extended-reach drill drivers where a No. 57 wire gauge hole is required. The aircraft extension designation makes it appropriate for reaching into recessed areas or drilling through stacked material in aerospace fabrication, avionics work, HVAC sheet metal installation, and general mechanical assembly. The right-hand cutting direction and two-flute spiral configuration provide consistent chip evacuation in ferrous and non-ferrous materials. Series 501-6 indicates an extension-length configuration versus a standard jobber bit.

Key Features

• No. 57 wire gauge cutting diameter: 0.043 inches
• 135-degree drill point angle with web-thinned tip for reduced entry force
• High speed steel construction for general-purpose drilling in metal and composite materials
• Oxide finish provides mild corrosion resistance and reduces friction during cutting
• 0.75-inch spiral flute length with tapered web configuration for efficient chip removal
• Straight cylindrical shank for use in standard drill chucks
• Conforms to NAS 907 Type B standards

Compatibility

Designed as a general-purpose aircraft extension drill bit for use with standard drill chucks accepting a 0.043-inch straight cylindrical shank. Compatible with applications requiring NAS 907 Type B compliant tooling.

Installation Notes

This drill bit is typically installed and used by machinists, aerospace technicians, sheet metal workers, and HVAC installers. Secure the shank fully in the chuck before operation and confirm the chuck is tightened with a chuck key where applicable. Use cutting fluid when drilling ferrous metals to extend tool life and improve hole finish. Inspect the bit for tip damage or chipping before each use, as small-diameter bits are susceptible to breakage under side load or misalignment.