Eagle Cutting Tool 1090D-108-I Drill Bit 1-1/8 in

Product Description

The EAGLE CUTTING TOOL 1090D-108-I is a 1-1/8 inch diameter Dyno bright gold cobalt twist drill bit with a 1/2 inch reduced shank. Designed for high-speed drilling through ferrous metals, stainless steel, cast iron, and hard alloys, this bit is suited for heavy-duty production and maintenance applications. The bright gold finish indicates a cobalt-grade construction that provides increased heat resistance and edge retention compared to standard high-speed steel bits. Installed in a 1/2 inch chuck, it delivers the rigidity needed to hold tight tolerances in demanding cut conditions.

This drill bit is used in industrial, commercial, and mechanical service environments where large-diameter holes are required in tough base materials. Typical applications include structural fabrication, pipefitting, millwright work, and equipment repair. The 1/2 inch shank makes it compatible with most heavy-duty drill presses, magnetic base drills, and right-angle drilling machines equipped with a 1/2 inch chuck or collet system. It is appropriate for both shop use and field service work.

Key Features

• 1-1/8 inch cutting diameter for large-bore drilling in hard materials
• 1/2 inch reduced shank fits standard 1/2 inch drill press and hand-drill chucks
• Bright gold cobalt construction provides elevated heat and wear resistance
• Heavy-duty twist geometry suited for ferrous metals and hard alloys
• Minimum order quantity of 1 unit — available as a single piece

Compatibility

Designed as a direct-fit replacement or production drill bit for use in any 1/2 inch keyed or keyless chuck capable of accommodating a 1-1/8 inch diameter twist drill.

Installation Notes

This bit should be installed by a qualified machinist, pipefitter, or mechanical technician using a properly rated drill press or magnetic base drill. Secure the 1/2 inch shank fully in the chuck and verify runout before drilling. Use appropriate cutting fluid or coolant when drilling ferrous metals to extend bit life and maintain edge integrity. Never exceed the recommended RPM range for the bit diameter and material being drilled.

Technical Specifications

• Cutting Diameter: 1-1/8 inches
• Shank Diameter: 1/2 inch
• Weight: 1.2 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: 1090D-108-I