Eagle Cutting Tool C1080-057-D Cobalt Drill Bit 57/64

Product Description

The EAGLE CUTTING TOOL C1080-057-D is a 57/64-inch cobalt screw machine (stub length) drill bit with a 1/2-inch reduced shank, manufactured in the USA. Cobalt construction provides superior heat resistance and edge retention compared to standard high-speed steel, making this bit well-suited for drilling through hard metals, stainless steel, cast iron, and high-tensile alloys. The stub-length flute design increases rigidity and reduces deflection during penetration, which is especially valuable in tight-clearance drilling applications. Licensed machinists, tool-and-die technicians, pipefitters, and industrial maintenance professionals are the primary users of this bit.

This drill bit is designed for use in stationary drill presses, CNC machining centers, radial arm drills, and heavy-duty handheld drill motors equipped with 1/2-inch chucks. The 57/64-inch diameter is a common size for hole preparation prior to reaming or tapping in metal fabrication and industrial maintenance environments. The 1/2-inch shank allows the bit to seat securely in standard 1/2-inch drill chucks without requiring a larger spindle bore, broadening its compatibility across common shop equipment.

Key Features

• 57/64-inch cutting diameter for precision metal drilling and pre-ream hole prep
• Cobalt construction for extended tool life in hard and abrasive materials
• Stub screw machine length reduces deflection and improves hole accuracy
• 1/2-inch reduced shank fits standard 1/2-inch drill chucks
• Made in the USA

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for standard 1/2-inch chuck drill presses, machining centers, and heavy-duty drill motors used in metal fabrication and industrial maintenance applications.

Installation Notes

Install and remove only with the drill motor fully powered down and the chuck key removed from the area. Secure the shank fully into the chuck and tighten evenly before operation. Use appropriate cutting fluid or coolant when drilling ferrous metals to extend bit life and maintain cutting edge integrity. Follow applicable shop safety standards and employer-mandated PPE requirements when operating rotary cutting tools.

Technical Specifications

• Cutting Diameter: 57/64 inches
• Shank Diameter: 1/2 inches
• Drill Style: Screw Machine (Stub Length)
• Material: Cobalt
• Country of Origin: USA
• Weight: 0.69 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1080-057-D