Eagle Cutting Tool C1080-056-D Cobalt Drill Bit 7/8 in

Product Description

The EAGLE CUTTING TOOL C1080-056-D is a cobalt screw machine (stub) length drill bit designed for high-performance drilling in tough materials. Built with a 7/8-inch diameter and a 1/2-inch reduced shank, this bit is suited for use in standard drill presses, milling machines, and heavy-duty handheld drills where a full-diameter shank would not fit available collets or chucks. Cobalt construction provides increased heat resistance and edge retention compared to standard high-speed steel, making it a reliable choice for drilling hardened steels, stainless steel, cast iron, and other abrasive metals. Manufactured in the USA.

This drill bit is intended for metal fabrication shops, maintenance and repair operations, and industrial production environments. The screw machine length profile is shorter than a jobber-length bit, which improves rigidity, reduces deflection, and allows drilling in tighter clearance situations. The 1/2-inch shank makes it compatible with a wide range of standard drill chucks and tool holders. It is commonly used by machinists, pipefitters, ironworkers, and tool-and-die tradespeople working with ferrous and non-ferrous metals.

Key Features

• 7/8-inch diameter cobalt construction for heat and wear resistance in hard metals
• 1/2-inch reduced shank fits standard 1/2-inch chucks and collet holders
• Screw machine (stub) length design increases rigidity and reduces bit deflection
• Manufactured in the USA
• Minimum order quantity of 1 unit

Compatibility

Designed as an OEM-style replacement or direct-use cobalt stub drill bit for industrial and trade applications requiring a 7/8-inch diameter, 1/2-inch shank configuration in standard drill presses, CNC setups, or heavy-duty portable drills.

Installation Notes

Install securely in a 1/2-inch drill chuck or compatible collet holder before use. Always power down and lock out the machine before changing bits. Use appropriate cutting fluid or coolant when drilling hard or stainless steel to extend bit life and prevent work hardening. Follow applicable shop safety standards and wear proper eye protection during operation.

Technical Specifications

• Diameter: 7/8 inches
• Shank Size: 1/2 inches
• Drill Type: Screw Machine (Stub) Length
• Material: Cobalt
• Country of Origin: USA
• Weight: 0.69 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1080-056-D