Eagle Cutting Tool C1090-104-I Cobalt Drill Bit 1-1/16 in

Product Description

The EAGLE CUTTING TOOL C1090-104-I is a cobalt screw machine (stub length) drill bit designed for drilling into tough materials including hardened steel, stainless steel, cast iron, and other hard-to-machine metals. The 1-1/16-inch cutting diameter pairs with a 1/2-inch straight shank, making it compatible with standard drill chucks found on drill presses, milling machines, and heavy-duty hand drills. The cobalt construction provides superior heat resistance compared to standard high-speed steel, allowing the bit to maintain a sharp cutting edge under high-speed, high-feed conditions common in metalworking and fabrication shops.

This drill bit is suited for use in machine shops, fabrication facilities, and industrial maintenance environments where stub-length drills are preferred for their rigidity and reduced deflection. The shorter flute length of the screw machine style improves stability when drilling through thick stock or when working in tight clearance situations. It is typically installed and used by machinists, tool-and-die technicians, pipefitters, and maintenance mechanics who require consistent hole quality in demanding materials.

Key Features

• Cobalt construction for improved heat resistance and longer tool life in hard metals
• Screw machine (stub) length design reduces deflection and improves hole accuracy
• 1-1/16-inch cutting diameter for large-bore drilling applications
• 1/2-inch straight shank fits standard drill chucks without adapters
• Suitable for drilling hardened steel, stainless steel, cast iron, and similar hard materials

Compatibility

Designed as a direct-fit replacement or standard addition for any drill press, milling machine, or heavy-duty drill equipped with a 1/2-inch or larger chuck capacity. No specific OEM model compatibility was provided in the product data.

Installation Notes

Secure the 1/2-inch shank firmly in the drill chuck before operation and verify the chuck key is removed prior to starting the machine. Use appropriate cutting fluid or coolant when drilling hard metals to extend tool life and improve hole finish. Always wear proper eye protection and secure the workpiece with a vise or clamps. Follow applicable shop safety standards and machine manufacturer guidelines for spindle speed and feed rate selection.

Technical Specifications

• Cutting Diameter: 1-1/16 inches
• Shank Diameter: 1/2 inch
• Drill Style: Screw Machine (Stub Length)
• Material: Cobalt
• Weight: 1.2 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1090-104-I