Eagle Cutting Tool C1090-035-I Cobalt Drill Bit 35/64 in

Product Description

The EAGLE CUTTING TOOL C1090-035-I is a 35/64-inch cobalt screw machine (stub length) drill bit with a 1/2-inch straight shank. Cobalt construction gives the bit improved heat resistance and wear life compared to standard high-speed steel, making it well suited for drilling harder ferrous metals, stainless steel, cast iron, and abrasive alloys. The stub-length body provides added rigidity and reduces deflection in short-reach drilling applications. Machinists, toolroom technicians, and industrial maintenance trades rely on this geometry when working in drill presses, CNC machining centers, and manual mills where a shorter flute length is an advantage.

This drill bit is intended for metalworking applications in manufacturing, fabrication shops, and industrial maintenance environments. The 1/2-inch shank seats directly into standard 1/2-inch drill chucks and collet holders without a reducer. The 35/64-inch cutting diameter is a common size for close-tolerance hole making and pre-drill operations ahead of reaming or tapping in production and repair work.

Key Features

• Cobalt construction for extended wear life and heat resistance in hard-metal drilling
• Stub/screw machine length for added rigidity and reduced deflection
• 35/64-inch cutting diameter for close-tolerance hole making
• 1/2-inch straight shank fits standard drill chucks and collet holders directly
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed as a standard screw machine length cobalt drill bit compatible with any drill press, CNC machine, or manual mill equipped with a 1/2-inch chuck or collet holder.

Installation Notes

Secure the shank fully in the chuck or collet before operation and verify runout before beginning a cut. Use appropriate cutting fluid or coolant when drilling hard or abrasive materials to preserve cutting edge life. Ensure the workpiece is firmly clamped before applying feed pressure. Follow applicable shop safety standards and machine manufacturer guidelines for spindle speed selection based on material type and drill diameter.

Technical Specifications

• Cutting Diameter: 35/64 inches
• Shank Diameter: 1/2 inch
• Drill Type: Screw Machine (Stub Length)
• Material: Cobalt
• Weight: 0.69 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1090-035-I