Eagle Cutting Tool C1090-112-I Cobalt Drill Bit 1-3/16 in

Product Description

The EAGLE CUTTING TOOL C1090-112-I is a cobalt screw machine (stub length) drill bit with a 1-3/16 inch cutting diameter and a 1/2 inch reduced shank. Cobalt construction provides increased heat and wear resistance compared to standard high-speed steel, making this bit well suited for drilling hard, abrasive, or stainless steel materials. The stub length body offers greater rigidity than jobber-length bits, reducing deflection and improving hole accuracy in production and heavy-duty drilling operations. Machinists, tool and die workers, and metalworking professionals rely on this style of drill for demanding metal-removal applications.

This drill bit is designed for use in machine shop, manufacturing, and industrial fabrication environments. It performs well in drill presses, milling machines, and CNC equipment where a 1/2 inch shank chuck or collet is used. The reduced shank allows the larger 1-3/16 inch diameter bit to be held in standard 1/2 inch capacity toolholders. Typical applications include drilling through mild steel, alloy steel, stainless steel, cast iron, and other ferrous metals where tool life and heat resistance are priorities.

Key Features

• 1-3/16 inch cutting diameter for large-bore metal drilling
• Cobalt alloy construction resists heat buildup and extends tool life in hard materials
• Screw machine (stub) length body improves rigidity and reduces deflection
• 1/2 inch reduced shank fits standard 1/2 inch capacity chucks and collets
• Suitable for drilling ferrous metals including stainless and alloy steels

Compatibility

Designed as a replacement or production-use cobalt stub drill for any drill press, milling machine, or CNC setup equipped with a 1/2 inch capacity chuck or toolholder.

Installation Notes

Installation and use should be performed by qualified machinists or metalworking professionals familiar with machine tool operation. Secure the shank fully in a properly rated chuck or collet before operation and verify the holding device is tightened to the machine manufacturer's specifications. Use appropriate cutting fluid or coolant to maximize bit life when drilling hard or abrasive metals. Always wear appropriate personal protective equipment and follow shop safety procedures when operating drilling machinery.

Technical Specifications

• Cutting Diameter: 1-3/16 inches
• Shank Diameter: 1/2 inch
• Drill Style: Screw Machine (Stub Length)
• Material: Cobalt
• Weight: 1.2 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1090-112-I