Eagle Cutting Tool 1090-108-I Silver Deming Drill Bit

Product Description

The EAGLE CUTTING TOOL 1090-108-I is a high speed steel (HSS) silver deming drill bit designed for drilling large-diameter holes in metal, wood, and plastic. The reduced 1/2 inch shank allows this oversized bit to fit standard 1/2 inch chucks, making it a practical choice when a full-shank bit would require a larger chuck. The 1-1/8 inch cutting diameter handles applications where standard jobber-length bits fall short. Machinists, maintenance technicians, and fabricators reach for silver deming bits when working with structural steel, plate stock, and heavy materials that demand controlled, high-torque drilling.

Silver deming bits are commonly used in industrial maintenance, metal fabrication shops, and construction trades. The reduced shank design makes this bit compatible with 1/2 inch drill presses and heavy-duty portable drills without requiring a dedicated large-capacity chuck. Typical applications include drilling bolt clearance holes, conduit knockouts in enclosures, and pipe flange holes where a 1-1/8 inch diameter is specified.

Key Features

• 1-1/8 inch cutting diameter for large-hole drilling in a single pass
• Reduced 1/2 inch shank fits standard 1/2 inch drill press and handheld drill chucks
• High speed steel construction provides heat resistance and edge retention during metal drilling
• Silver deming (split-point or standard) geometry reduces walking on entry
• Minimum order quantity of 1 unit

Compatibility

Designed as a standard silver deming replacement or add-on bit for use with any 1/2 inch chuck drill press or heavy-duty portable drill rated for large-diameter hole drilling.

Installation Notes

Silver deming drill bits are installed and operated by machinists and maintenance trades familiar with metal drilling procedures. Secure the workpiece firmly before drilling and use cutting fluid or oil when drilling ferrous metals to extend bit life and reduce heat buildup. Start at a lower RPM appropriate for the 1-1/8 inch diameter to avoid overloading the chuck or overheating the cutting edge. Inspect the shank seating in the chuck before each use to confirm it is fully engaged and properly tightened.

Technical Specifications

• Cutting Diameter: 1-1/8 inches
• Shank Diameter: 1/2 inch
• Material: High Speed Steel (HSS)
• Weight: 1.2 pounds

Standard Information

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