Eagle Cutting Tool C1090-057-I Cobalt Drill Bit 57/64

Product Description

The EAGLE CUTTING TOOL C1090-057-I is a 57/64-inch cobalt screw machine (stub length) drill bit with a 1/2-inch reduced shank. Cobalt high-speed steel construction provides increased heat resistance and hardness retention compared to standard HSS, making it suitable for drilling stainless steel, cast iron, hard alloys, and other tough materials. The stub-length body offers greater rigidity and reduced deflection, which is critical when drilling in confined spaces or on manual and CNC machine setups. At 0.69 pounds, the bit is a solid, production-grade tool suited for machinists, fabricators, and maintenance technicians.

The C1090-057-I is designed for use in drill presses, milling machines, and CNC machining centers where a 1/2-inch chuck or collet is available. The screw machine length is the preferred format in production environments and heavy fabrication shops where hole accuracy and tool life under repeated use are priorities. Typical applications include metalworking, structural fabrication, and maintenance drilling in industrial and commercial settings.

Key Features

• 57/64-inch cutting diameter in a stub-length screw machine profile for added rigidity
• Cobalt high-speed steel construction for heat resistance and durability in hard metals
• 1/2-inch reduced shank fits standard drill press chucks and CNC tool holders
• Stub-length design minimizes deflection and improves hole location accuracy
• Production-grade construction suited for repeated use in shop and field environments

Compatibility

Designed for use in any drill press, milling machine, or machining center equipped with a 1/2-inch chuck, collet, or tool holder. Suitable for drilling ferrous and non-ferrous metals including stainless steel, hardened steel, cast iron, and hard alloys.

Installation Notes

Installation and use should be performed by a qualified machinist or experienced tradesperson familiar with cutting tool safety practices. Ensure the shank is fully seated and securely clamped in the chuck or collet before operation. Always wear appropriate eye and face protection when operating drill equipment. Use cutting fluid or coolant when drilling hard or heat-sensitive materials to extend tool life and maintain hole quality.

Technical Specifications

• Cutting Diameter: 57/64 inches
• Shank Diameter: 1/2 inches
• Drill Style: Screw Machine (Stub Length)
• Material: Cobalt High-Speed Steel
• Weight: 0.69 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1090-057-I