Eagle Cutting Tool C1090-052-I Cobalt Drill Bit 13/16 in

Product Description

The EAGLE CUTTING TOOL C1090-052-I is a 13/16-inch cobalt screw machine (stub) length drill bit with a 1/2-inch reduced shank. Cobalt high-speed steel construction provides increased heat and wear resistance compared to standard HSS bits, making it well suited for drilling hard or abrasive materials. The screw machine length geometry offers a shorter flute and body than a jobber bit, delivering greater rigidity and reduced deflection in production drilling applications. This bit is handled by machinists, tool-and-die tradespeople, and fabricators working with ferrous and difficult-to-machine metals.

This drill bit is designed for use in drill presses, milling machines, and CNC machining centers where a 1/2-inch chuck or collet is available. The stub length profile is favored in shop environments where precision hole placement and chatter reduction are priorities. Typical applications include drilling stainless steel, hardened steel, cast iron, and high-nickel alloys in light manufacturing, maintenance, and fabrication settings.

Key Features

• 13/16-inch cutting diameter for standard fractional hole sizing
• Cobalt HSS construction for superior heat resistance and extended tool life in hard materials
• Screw machine (stub) length body provides rigidity and minimizes deflection
• 1/2-inch reduced shank fits standard drill press and machine tool chucks
• Suitable for ferrous metals, stainless steel, and abrasive alloys

Compatibility

Designed as an OEM-style replacement or direct-use stub drill for any drill press, turret lathe, or machining center equipped with a 1/2-inch chuck or collet system.

Installation Notes

Secure the 1/2-inch shank fully in the chuck before operation and verify runout before drilling. Use appropriate cutting fluid or coolant when drilling hardened or stainless steel to preserve cutting edge life. Always wear appropriate eye protection and ensure the workpiece is clamped securely. Follow applicable shop safety codes and machine manufacturer guidelines for spindle speed selection based on material and diameter.

Technical Specifications

• Cutting Diameter: 13/16 inches
• Shank Diameter: 1/2 inch
• Drill Type: Screw Machine (Stub) Length
• Material: Cobalt High-Speed Steel
• Weight: 0.69 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1090-052-I