Eagle Cutting Tool C1090-060-I Cobalt Drill Bit 15/16 in

Product Description

The EAGLE CUTTING TOOL C1090-060-I is a cobalt screw machine (stub) length drill bit with a 15/16-inch cutting diameter and a 1/2-inch straight shank. Cobalt construction provides increased heat resistance and hardness compared to standard high-speed steel, making it well suited for drilling through tough ferrous metals, stainless steel, cast iron, and other hard-to-machine materials. The stub-length body reduces deflection and improves rigidity in short-reach drilling applications. Electricians, pipefitters, machinists, and maintenance technicians use this style of drill bit where accuracy and tool life in hard materials are priorities.

This bit is intended for use in stationary drill presses, magnetic drills, and heavy-duty hand drills equipped with a 1/2-inch chuck. Typical applications include drilling clearance holes, pilot holes, and through-holes in structural steel, hard plate, and similar materials encountered in industrial and commercial trade work. The screw machine length profile makes it a practical choice in confined spaces or where a shorter bit is preferred for control and stability.

Key Features

• 15/16-inch cutting diameter for standard clearance and through-hole applications in hard materials
• Cobalt construction delivers superior heat and wear resistance over standard HSS bits
• Stub screw machine length reduces deflection and increases rigidity during drilling
• 1/2-inch straight shank fits standard 1/2-inch drill chucks and magnetic drill arbors
• Suited for ferrous metals, stainless steel, cast iron, and similarly hard workpiece materials

Compatibility

Designed as a direct-fit replacement for standard 15/16-inch cobalt screw machine drill bits with a 1/2-inch straight shank, compatible with any drill press, magnetic base drill, or heavy-duty hand drill accepting a 1/2-inch shank.

Installation Notes

A licensed machinist or qualified tradesperson should secure the bit fully in a 1/2-inch chuck before operation. Ensure the workpiece is firmly clamped and the drill is powered down completely before bit changes. Use appropriate cutting fluid on hard or stainless materials to extend tool life and manage heat buildup. Follow applicable shop safety codes and wear appropriate PPE during all drilling operations.

Technical Specifications

• Cutting Diameter: 15/16 inches
• Shank Diameter: 1/2 inch
• Bit Type: Screw Machine (Stub) Length
• Material: Cobalt
• Weight: 0.69 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1090-060-I