Eagle Cutting Tool C1090-114-I Cobalt Silver Deming Drill

Product Description

The EAGLE CUTTING TOOL C1090-114-I is a cobalt silver deming drill bit with a 1-7/32 inch cutting diameter and a reduced 1/2 inch straight shank. Silver deming bits are designed for drilling large-diameter holes in metal using a standard 1/2 inch drill chuck, eliminating the need for a large-capacity chuck or Morse taper spindle. The cobalt construction improves heat resistance and edge retention compared to standard high-speed steel, making this bit suitable for harder metals and higher-production drilling cycles. Machinists, maintenance technicians, and fabricators typically reach for this style when drilling through steel plate, cast iron, or stainless steel where a standard twist drill would wear quickly.

This bit is suited for use in drill presses, magnetic base drills, and hand-held heavy-duty drills equipped with a 1/2 inch chuck. Typical applications include structural fabrication shops, HVAC equipment fabrication, plumbing rough-in work requiring oversized metal penetrations, and general maintenance drilling in industrial and commercial settings. The 1-7/32 inch diameter is a common size for creating clearance holes and knock-outs in sheet metal enclosures, panels, and light structural steel.

Key Features

• 1-7/32 inch cutting diameter fits oversized hole requirements without a large-capacity chuck
• Cobalt steel construction provides elevated heat resistance and extended tool life in hard metals
• Reduced 1/2 inch straight shank is compatible with standard 1/2 inch drill chucks
• Silver deming geometry allows use in portable drills and bench-top drill presses

Compatibility

Designed as a direct-fit replacement for standard 1-7/32 inch reduced-shank silver deming drill bits used with any drill press or heavy-duty drill accepting a 1/2 inch shank.

Installation Notes

Secure the 1/2 inch shank firmly in a properly rated drill chuck before operation. Use cutting fluid or a suitable metalworking lubricant when drilling hard or thick metals to reduce heat buildup and extend bit life. Wear appropriate PPE including eye protection and secure the workpiece before drilling. Inspect the cutting edges for wear or chipping before each use and replace the bit if the edge is compromised.

Technical Specifications

• Cutting Diameter: 1-7/32 inches
• Shank Diameter: 1/2 inch
• Shank Type: Reduced straight shank
• Material: Cobalt steel
• Weight: 1.2 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1090-114-I