Precision Twist Drill 5996053 Cobalt Drill Bit 33

Product Description

The PRECISION TWIST DRILL 5996053 is a cobalt aircraft extension drill bit designed for drilling in tough materials including stainless steel, high-temperature alloys, and hardened steels. Built to Series CO501-6 specifications, this wire gauge size 33 bit measures 0.113 inches in diameter with a 135-degree split point that is self-centering, reducing the need for a center punch and minimizing walking on contact. The straw finish indicates a heat-treatment process that enhances hardness and wear resistance. With a 1.5-inch spiral flute length and 6-inch overall length, it is suited for reaching into deeper workpieces or tight clearance areas. Licensed mechanics, aerospace technicians, and industrial maintenance trades commonly use this bit.

This drill bit is intended for use in aircraft-style drilling applications where extended reach is required. The 6-inch overall length provides access to recessed locations that standard-length bits cannot reach. It is well suited for production shops, MRO environments, and field repair work involving aluminum airframes, steel structural members, and similar materials. The right-hand cutting direction and two-flute spiral design support efficient chip evacuation during through-hole and blind-hole drilling operations.

Key Features

• Wire gauge size 33 with 0.113-inch diameter for precision hole sizing
• 135-degree split point with self-centering geometry reduces center-punch requirement
• Cobalt tool material provides heat and wear resistance in hard metals
• 6-inch overall length with 1.5-inch flute length for extended-reach applications
• Straw finish from heat treatment improves surface hardness
• Web-thinned tapered web construction reduces thrust during drilling
• Meets NAS 907 Type J standards for aerospace drill bit performance

Compatibility

Designed as an OEM-style replacement and standard production drill bit for use in aircraft-extension drilling applications conforming to NAS 907 Type J requirements.

Installation Notes

This bit is installed in standard drill chucks or collet systems that accept a 0.113-inch straight cylindrical shank. Secure the shank fully in the chuck before operation and verify runout is within acceptable limits for the application. Use appropriate cutting fluid for hard metals to manage heat buildup and extend bit life. Always wear eye protection and follow applicable shop safety procedures when operating rotary cutting tools.