Eagle Cutting Tool C1090-044-I Cobalt Drill Bit 11/16 in

Product Description

The EAGLE CUTTING TOOL C1090-044-I is a cobalt screw machine length (stub) drill bit designed for drilling through hard and tough materials in production and fabrication environments. Built to a 11/16-inch diameter with a 1/2-inch reduced shank, this bit fits standard 1/2-inch drill chucks and milling machine spindles without an adapter. Cobalt construction provides elevated heat resistance compared to standard high-speed steel, making it suitable for stainless steel, cast iron, titanium, and other abrasion-resistant alloys. Machinists, tool-and-die workers, and metal fabricators reach for screw machine length bits when rigidity and reduced deflection matter more than deep hole reach.

This drill bit is suited for use in CNC machining centers, knee mills, drill presses, and handheld magnetic drills where a 1/2-inch chuck or collet is present. The stub length body reduces chatter and walkoff on hard-metal surfaces, making it a common choice in job shops and maintenance facilities handling structural steel, stainless components, and heat-treated alloy stock. It is appropriate for both production drilling runs and one-off maintenance applications requiring a reliable cobalt-grade tool.

Key Features

• Cobalt construction resists heat buildup when drilling hard and abrasion-resistant metals
• 11/16-inch cutting diameter with 1/2-inch reduced shank for broad chuck compatibility
• Screw machine (stub) length body reduces deflection and improves hole accuracy
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed as a standard screw machine length drill bit compatible with any 1/2-inch drill chuck or collet on drill presses, mills, and magnetic base drills.

Installation Notes

Secure the 1/2-inch shank firmly in a properly sized chuck or collet before operation. Confirm spindle speed is appropriate for the workpiece material and bit diameter — consult standard feeds-and-speeds charts for cobalt tooling. Always wear appropriate eye protection and secure the workpiece. Inspect the cutting edges for wear or chipping before each use and replace if the tip is damaged.

Technical Specifications

• Cutting Diameter: 11/16 inches
• Shank Diameter: 1/2 inch
• Drill Series: Screw Machine Length (Stub)
• Material: Cobalt
• Weight: 0.69 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1090-044-I