Precision Twist Drill 5996018 Cobalt Aircraft Drill Bit

Product Description

The PRECISION TWIST DRILL 5996018 is a cobalt aircraft extension drill bit designed for high-performance drilling in tough materials including stainless steel, heat-resistant alloys, and hardened metals. It carries a 135-degree split point geometry that is self-centering, reducing the need for a center punch and minimizing walking on entry. The straw finish indicates controlled heat treatment applied during manufacturing. With a wire gauge size of 26 and a decimal diameter of 0.147 inches, this bit fits precision hole applications where tight tolerances matter. Licensed HVAC, mechanical, and industrial tradespeople working with sheet metal, aircraft-grade substrates, or structural components will find this bit suited to demanding production and field work.

This drill bit is built for use in aircraft, aerospace, and general industrial applications where extended reach and precision are required. The 1.875-inch flute length paired with a 6-inch overall length gives the bit reach into recessed or deep-clearance areas. The straight-cylindrical shank at 0.147 inches diameter seats securely in standard drill chucks. Right-hand cutting direction and a two-flute spiral configuration support efficient chip evacuation in both through-hole and blind-hole scenarios. It is rated for general-purpose use under NAS 907 Type J standards.

Key Features

• Cobalt tool material provides heat and wear resistance for drilling hard metals and alloys
• 135-degree split point is self-centering and reduces entry walking without a center punch
• Straw finish indicates heat-treated cobalt construction for extended tool life
• Web-thinned, tapered web configuration reduces thrust and improves chip clearance
• 6-inch overall length with 1.875-inch flute length for extended-reach applications
• Meets NAS 907 Type J standards for aircraft and industrial use

Compatibility

Designed as an OEM-style replacement and general-purpose drill bit for use in standard drill chucks accepting a 0.147-inch straight-cylindrical shank, suitable for aircraft extension drilling applications in industrial and mechanical trade environments.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists, sheet metal workers, or mechanical tradespeople familiar with proper drilling techniques. Secure the workpiece before drilling and confirm the drill chuck is tightened to the shank before operation. Use appropriate cutting fluid for hard metals to manage heat buildup and extend bit life. Inspect the cutting edges before each use and replace the bit if chipping or wear is observed.