Eagle Cutting Tool C1090-036-I Cobalt Drill Bit 9/16 in

Product Description

The EAGLE CUTTING TOOL C1090-036-I is a 9/16-inch cobalt screw machine (stub) length drill bit with a 1/2-inch straight shank. Cobalt construction provides elevated heat resistance and edge retention compared to standard high-speed steel, making it suitable for drilling hard and abrasive materials including stainless steel, cast iron, and hardened alloys. The stub-length body reduces deflection and increases rigidity during high-torque drilling operations. Machinists, pipefitters, and metal fabricators reach for cobalt stub drills when hole placement accuracy and drill life in tough materials are the priority.

This drill bit is suited for use in machine shops, fabrication facilities, and on-site metalworking applications where a 9/16-inch diameter hole is required. The 1/2-inch shank is compatible with standard drill chucks and machine spindles in that capacity range. Its screw machine length profile makes it a practical choice for drill presses, lathes, and CNC setups where clearance is limited or a shorter cutting tool is preferred over a jobber-length bit.

Key Features

• Cobalt construction for improved heat resistance and extended tool life in hard materials
• Stub/screw machine length body reduces deflection and improves hole accuracy
• 9/16-inch cutting diameter for standard fractional hole sizing
• 1/2-inch straight shank fits common drill chucks and machine spindles
• Suitable for stainless steel, cast iron, and other hard or abrasive metals

Compatibility

Designed as a screw machine length cobalt drill bit for use in drill presses, lathes, CNC machines, and hand-held drills equipped with a 1/2-inch or larger chuck capacity.

Installation Notes

Installation is performed by machinists, metal fabricators, or maintenance trades familiar with rotary cutting tools. Secure the 1/2-inch shank firmly in the chuck before operation and verify chuck tightness to prevent slippage. Use cutting fluid or coolant when drilling hard metals to preserve edge life and reduce heat buildup. Wear appropriate eye protection and follow shop safety protocols during all drilling operations.

Technical Specifications

• Cutting Diameter: 9/16 inches
• Shank Diameter: 1/2 inches
• Drill Series: Screw Machine (Stub) Length
• Material: Cobalt
• Weight: 0.69 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C1090-036-I