Eagle Cutting Tool SC400-020-I Cobalt Stub Drill 5/16

Product Description

The EAGLE CUTTING TOOL SC400-020-I is a 5/16-inch cobalt stub drill designed for metal drilling applications where a shorter flute length provides added rigidity and reduced deflection. Cobalt construction gives this drill increased heat resistance and hardness compared to standard high-speed steel, making it well suited for drilling into harder ferrous metals, stainless steel, and abrasive alloys. The stub (screw machine) length geometry keeps the tool close to the chuck, minimizing flex during high-feed drilling. Machinists, maintenance technicians, and metalworkers are the primary users of this drill.

This drill is commonly used in shop and field applications where standard jobber-length drills introduce too much flex or chatter. Typical uses include drilling through structural steel, pipe, plate, and other hard metals in HVAC, plumbing, and electrical rough-in work, as well as general fabrication and maintenance operations. The 5/16-inch diameter is a frequently used size for tapping 3/8-inch threads and for clearance holes in light structural applications.

Key Features

• Cobalt alloy construction for improved heat and wear resistance over standard HSS drills
• Stub (screw machine) length for added rigidity and reduced deflection in hard materials
• 5/16-inch diameter suits common tapping and clearance-hole applications
• Suitable for drilling ferrous metals, stainless steel, and abrasive alloys
• Minimum order quantity of 1 allows single-unit purchasing

Compatibility

Designed as a standard 5/16-inch stub-length cobalt drill compatible with any drill press, hand drill, or CNC machine tool accepting a 5/16-inch straight shank.

Installation Notes

This drill is installed and used by machinists, maintenance technicians, and trade professionals working with metal. Secure the shank fully in the chuck before use and confirm chuck key is removed before powering on the drill. Use appropriate cutting fluid or lubricant when drilling hard metals to extend tool life and improve hole quality. Always wear eye protection and secure workpieces with a vise or clamp rather than holding by hand.

Technical Specifications

• Diameter: 5/16 inches
• Drill Type: Stub (Screw Machine) Length
• Material: Cobalt
• Weight: 0.95 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: SC400-020-I