Eagle Cutting Tool S300-020-I Cobalt Jobber Drill 5/16 in

Product Description

The EAGLE CUTTING TOOL S300-020-I is a 5/16-inch cobalt jobber-length drill bit designed for general-purpose drilling in demanding materials. Cobalt construction provides elevated heat resistance compared to standard high-speed steel, making it suitable for drilling through stainless steel, cast iron, hardened alloys, and other tough metals encountered on commercial and industrial job sites. This bit is built to jobber-length specifications, offering the reach and rigidity tradespeople rely on for consistent hole placement in metal fabrication, HVAC mechanical work, electrical rough-in, and plumbing installations.

This drill bit is appropriate for use in residential and commercial trade applications where hard or abrasive materials are involved. It fits standard 3-jaw drill chucks and is compatible with corded and cordless drill drivers used by licensed electricians, HVAC technicians, pipefitters, and general mechanical contractors. The 5/16-inch diameter is a common size for conduit knockouts, anchor bolt clearance holes, and mechanical fastener pilot holes.

Key Features

• Cobalt construction for improved heat resistance and durability in tough metals
• Jobber-length design provides standard reach and balanced rigidity
• 5/16-inch diameter suits common trade applications including pilot holes and anchor clearances
• Compatible with standard 3-jaw drill chucks on corded and cordless equipment

Compatibility

Designed as a jobber-length drill bit for use with standard drill chucks in typical metal drilling applications across HVAC, electrical, plumbing, and mechanical trades.

Installation Notes

A licensed tradesperson or qualified operator should select the appropriate drill speed for the material being drilled, as cobalt bits perform best at lower RPMs with consistent feed pressure on hard metals. Ensure the workpiece is securely clamped before drilling to prevent bit walking or injury. Use cutting fluid on stainless steel and hardened alloys to extend bit life and maintain hole quality. Inspect the cutting edges before each use and replace the bit if chipping or dullness is observed.

Technical Specifications

• Drill Diameter: 5/16 inches
• Drill Type: Jobber Length
• Material: Cobalt
• Weight: 1.2 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: S300-020-I