Eagle Cutting Tool C1090-058-I Cobalt Drill Bit 29/32 in

Product Description

The EAGLE CUTTING TOOL C1090-058-I is a 29/32-inch cobalt screw machine (stub length) drill bit with a 1/2-inch reduced shank, built for drilling through hard and abrasive materials in demanding shop and field environments. Cobalt construction gives the bit greater heat resistance than standard high-speed steel, allowing it to maintain cutting edge integrity under high-friction conditions. The stub-length body provides added rigidity and reduced deflection compared to jobber-length bits, making it well suited for production drilling operations where accuracy and repeatability matter. Licensed machinists, tool-and-die technicians, pipefitters, and industrial maintenance mechanics are the primary users of this style of bit.

This drill bit is designed for use in drill presses, milling machines, and magnetic-base drills where a 1/2-inch chuck is standard. The 29/32-inch diameter is a common sizing for bolt clearance holes, port openings, and stepped-hole operations in steel, stainless steel, cast iron, and other ferrous materials. The reduced shank allows the bit to seat in standard 1/2-inch chucks even though the cutting diameter exceeds that measurement, expanding its usability across common machine setups without the need for specialty tooling.

Key Features

• Cobalt construction for improved heat resistance and extended tool life in hard metals
• Stub screw machine length for increased rigidity and reduced bit deflection
• 29/32-inch cutting diameter suits bolt clearance and port-opening applications
• 1/2-inch reduced shank fits standard 1/2-inch drill press and machine chucks
• Suitable for ferrous metals including steel, stainless steel, and cast iron

Compatibility

Designed as a screw machine stub-length drill bit for use in drill presses, milling machines, and magnetic-base drills equipped with a standard 1/2-inch chuck.

Installation Notes

This bit should be installed by a qualified machinist or trained tradesperson familiar with rotary cutting tools. Secure the shank fully in the chuck and verify concentricity before drilling. Use appropriate cutting fluid or coolant when drilling ferrous metals to prolong tool life and maintain hole quality. Always wear eye protection and follow shop safety protocols when operating drilling equipment.

Technical Specifications

• Cutting Diameter: 29/32 inches
• Shank Diameter: 1/2 inch
• Drill Style: Screw Machine (Stub Length)
• Material: Cobalt
• Weight: 0.69 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1090-058-I