Eagle Cutting Tool SC404-121-D Cobalt Stub Drill Size 21

Product Description

The EAGLE CUTTING TOOL SC404-121-D is a size 21 cobalt stub drill manufactured in the USA. Stub-length drills feature a shorter flute and overall length compared to jobber-length bits, providing greater rigidity and reduced deflection when drilling in tight spaces or hard materials. The cobalt construction gives this bit increased heat resistance and wear life over standard high-speed steel, making it well suited for drilling into stainless steel, cast iron, hardened alloys, and other tough materials encountered in trade applications. Licensed tradespeople and machinists reach for cobalt stub drills when precision and durability in demanding materials are the priority.

This stub drill is appropriate for use in metalworking and fabrication settings, including HVAC equipment service, plumbing rough-in, electrical panel work, and general mechanical shop use. The shorter body makes it practical for drilling in confined areas where a standard jobber-length bit would not fit or would flex. It is compatible with any standard drill chuck that accepts its shank diameter.

Key Features

• Cobalt construction for superior heat resistance and extended tool life in hard metals
• Stub-length body provides greater rigidity and minimizes deflection
• Size 21 wire gauge designation for precise hole sizing
• Manufactured in the USA
• Minimum order quantity of 1 unit

Compatibility

Designed as an OEM-style replacement or direct-use stub drill suitable for standard drill chucks accepting the appropriate wire-gauge shank size in metalworking and trade applications.

Installation Notes

Cobalt stub drills should be installed in a properly rated drill press or hand drill with a secure chuck. Always wear appropriate eye protection and ensure the workpiece is firmly clamped before drilling. Use a cutting fluid or lubricant when drilling hard metals to extend bit life and maintain hole quality. Inspect the cutting edges for wear before each use and replace when the bit no longer cuts cleanly.

Technical Specifications

• Drill Size: 21 (wire gauge)
• Material: Cobalt
• Length Type: Stub
• Country of Origin: USA
• Weight: 0.1 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: SC404-121-D