Precision Twist Drill 5996067 Cobalt Drill Bit Wire 36

Product Description

The PRECISION TWIST DRILL 5996067 is a cobalt aircraft extension drill bit engineered for drilling in tough materials where standard high-speed steel bits fall short. Built to Series CO501-6 standards and conforming to NAS 907 Type J, this bit carries a 0.1065 inch diameter with a straight-cylindrical shank of matching diameter. The 135-degree split point is self-centering and web-thinned, reducing the need for a center punch and minimizing walking on hard or curved surfaces. The straw finish indicates a heat-treatment process consistent with cobalt tooling. Two spiral flutes with a tapered web configuration provide efficient chip evacuation during extension drilling operations.

This drill bit is suited for aircraft fabrication, sheet metal work, and general-purpose drilling in stainless steel, high-nickel alloys, titanium, and other work-hardening materials. The wire gauge No. 36 sizing and 6 inch overall length make it appropriate for reaching into recessed locations or through stacked material assemblies where standard-length bits cannot reach. It is used by aerospace maintenance technicians, aircraft mechanics, and precision metalworking trades on both production and MRO applications.

Key Features

• Cobalt tool material for heat resistance and durability in hard and work-hardening metals
• 135-degree split point with self-centering geometry reduces setup time and bit walking
• Web-thinned tapered web lowers thrust requirements during penetration
• 6 inch overall length provides reach into deep or recessed drilling locations
• 1.4375 inch flute length with 4xD flute-to-diameter ratio for controlled chip removal
• Straw finish consistent with cobalt high-temperature processing
• Conforms to NAS 907 Type J standard

Compatibility

Designed as an OEM-style replacement and standard-issue cobalt extension drill bit for use in aircraft fabrication and precision metalworking applications requiring a No. 36 wire-gauge diameter at 6 inch overall length.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists, aircraft mechanics, or metalworking tradespeople familiar with cobalt tooling. Secure the workpiece firmly before drilling and use appropriate cutting fluid for the material being drilled to extend bit life. Inspect the shank and cutting edges before each use and discard bits showing chipping, cracking, or excessive wear. Right-hand rotation only — confirm drill press or hand drill is set to forward before operation.