Eagle Cutting Tool S304-109-I Cobalt Jobber Drill Size 9

Product Description

The EAGLE CUTTING TOOL S304-109-I is a Size 9 cobalt jobber-length drill bit built for demanding drilling applications in metal, stainless steel, cast iron, and other hard materials. Cobalt construction provides superior heat resistance compared to standard high-speed steel, making it the right choice when cutting speeds or workpiece hardness generate significant friction. Jobber-length geometry offers the balance of reach and rigidity that tradespeople and machinists rely on for general-purpose through-hole drilling. This bit is suited for use in hand drills, drill presses, and CNC setups where a standard jobber drill is specified.

The S304-109-I fits residential, commercial, and light industrial applications wherever a Size 9 drill is required. Typical use cases include drilling pilot holes, clearance holes, and through-holes in ferrous and non-ferrous metals during HVAC, plumbing, electrical, and mechanical installation work. It is equally at home in a fabrication shop or on a job site.

Key Features

• Cobalt construction for elevated heat and wear resistance when drilling hard metals
• Jobber-length design balances reach with torsional rigidity
• Size 9 wire gauge diameter for precise clearance and pilot-hole applications
• Compatible with standard drill chucks on hand drills, drill presses, and CNC equipment
• Minimum order quantity of 1, available as a single unit

Compatibility

Designed as a general-purpose Size 9 cobalt jobber drill suitable for use in any standard drill chuck accepting wire gauge shank diameters in this size range.

Installation Notes

Drilling with cobalt bits should be performed at appropriate speeds for the workpiece material — lower RPM for harder metals and larger diameters reduces heat buildup and extends bit life. Use cutting fluid or a suitable lubricant when drilling ferrous metals to prolong edge life. Secure the workpiece firmly before drilling to prevent walking. Wear appropriate eye protection in accordance with applicable job-site safety requirements.

Technical Specifications

• Drill Size: 9 (wire gauge)
• Drill Type: Jobber Length
• Material: Cobalt
• Weight: 0.4 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: S304-109-I