Eagle Cutting Tool C1080-043-D Cobalt Stub Drill Bit

Product Description

The EAGLE CUTTING TOOL C1080-043-D is a 43/64-inch cobalt stub-length (screw-machine) drill bit with a 1/2-inch reduced shank, manufactured in the USA. Cobalt high-speed steel construction provides superior heat resistance and edge retention when drilling through hard or abrasive materials such as stainless steel, cast iron, titanium, and hardened alloys. The stub-length flute design offers increased rigidity over jobber-length bits, reducing deflection and improving hole accuracy in demanding production and maintenance environments. Machinists, tool-and-die workers, and industrial maintenance technicians rely on this style of bit for precision drilling in tight workspaces or on drill press and CNC setups where rigidity is critical.

The C1080-043-D is suited for use in general machining, fabrication shops, and industrial maintenance applications where hard or difficult-to-machine materials are common. The 1/2-inch shank allows it to seat in standard 1/2-inch keyed or keyless chucks found on drill presses, knee mills, lathes, and compatible CNC equipment. Its stub-length geometry is particularly useful when drilling through thicker stock or when minimizing bit runout is a priority.

Key Features

• 43/64-inch cutting diameter for precise oversized or clearance hole applications
• Cobalt high-speed steel construction resists heat buildup and edge wear on hard materials
• Stub-length flute design increases rigidity and reduces deflection during drilling
• 1/2-inch reduced shank fits standard 1/2-inch drill chucks and collet holders
• Manufactured in the USA to industrial quality standards

Compatibility

Designed for use with standard 1/2-inch drill chucks on drill presses, milling machines, lathes, and compatible CNC drilling equipment commonly found in machining and fabrication environments.

Installation Notes

Secure the shank firmly in a properly sized chuck before operation and verify runout before beginning a cut. Always wear appropriate eye protection and ensure the workpiece is clamped securely to prevent movement. Use a suitable cutting fluid for hard materials to extend tool life and improve hole finish. Allow the bit to cool gradually after use — do not quench cobalt tooling in water, as thermal shock can cause micro-cracking.

Technical Specifications

• Cutting Diameter: 43/64 inches
• Shank Diameter: 1/2 inches
• Drill Series: Stub Length (Screw Machine)
• Material: Cobalt High-Speed Steel
• Country of Origin: USA
• Weight: 0.69 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1080-043-D