Eagle Cutting Tool C304-139-D Cobalt Jobber Drill Size 39

Product Description

The EAGLE CUTTING TOOL C304-139-D is a size 39 cobalt jobber-length drill bit manufactured in the USA. Cobalt construction gives this bit superior heat and wear resistance compared to standard high-speed steel, making it well suited for drilling harder alloys, stainless steel, cast iron, and other tough materials. The jobber-length geometry provides a balanced combination of reach and rigidity, reducing deflection during drilling operations. This bit is a standard tool for machinists, pipefitters, electricians, HVAC technicians, and plumbers who need reliable, repeatable hole quality in metal substrates.

The C304-139-D is appropriate for use in both stationary drill press setups and handheld drill applications where a size 39 wire gauge hole is required. It is commonly used in fabrication shops, mechanical rooms, and field service work where drilling into ferrous and non-ferrous metals is part of routine tasks. USA manufacture indicates adherence to domestic tooling standards for dimensional accuracy and material consistency.

Key Features

• Cobalt construction for improved heat resistance and extended tool life in hard materials
• Jobber-length geometry balances reach with rigidity to minimize bit deflection
• Size 39 wire gauge diameter for precise, repeatable hole sizing
• Manufactured in the USA to domestic dimensional and material standards
• Compatible with standard drill chucks used in handheld and bench-mounted equipment

Compatibility

Designed as an OEM-style replacement or standard tooling addition for any application requiring a wire gauge size 39 cobalt jobber drill bit in handheld drills or drill press equipment.

Installation Notes

This bit is installed and used by machinists, pipefitters, electricians, and HVAC or plumbing technicians. Always secure the workpiece before drilling and ensure the bit is properly seated and tightened in the chuck before operation. Use appropriate cutting fluid when drilling hardened or stainless alloys to extend bit life. Inspect the cutting edges for wear before each use and replace the bit if chipping or dulling is observed.

Technical Specifications

• Drill Size: 39 (wire gauge)
• Drill Type: Jobber Length
• Material: Cobalt
• Country of Origin: USA
• Weight: 0.12 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: C304-139-D