Eagle Cutting Tool SC400-028-I Cobalt Stub Drill 7/16

Product Description

The EAGLE CUTTING TOOL SC400-028-I is a cobalt stub-length drill bit designed for high-performance drilling in hard and abrasive materials. Built with a 135-degree split point, this bit starts on contact without a center punch and reduces walking on smooth or curved surfaces. The stub-length body provides added rigidity and reduced deflection compared to jobber-length bits, making it well suited for production drilling in tight spaces or on drill presses. Cobalt construction gives it elevated heat resistance, extending tool life when drilling stainless steel, cast iron, high-strength alloys, and other tough workpiece materials. The 7/16 inch diameter meets common hole-size requirements across a wide range of fabrication and maintenance applications.

This bit is used in metalworking environments including manufacturing, fabrication shops, maintenance and repair operations, and industrial service work. Its stub-length geometry makes it a preferred choice when standard jobber bits flex too much or when spindle-to-workpiece clearance is limited. The 135-degree split point geometry performs particularly well on stainless steel and hardened materials where conventional 118-degree bits tend to work-harden the surface. Professional machinists, millwrights, pipefitters, and maintenance technicians are the primary users of this tool type.

Key Features

• Cobalt construction provides superior heat and wear resistance for drilling hard metals
• 135-degree split point starts on contact and reduces bit walking on hard or curved surfaces
• Stub-length body increases rigidity and reduces deflection compared to jobber-length bits
• 7/16 inch diameter suits a wide range of production and maintenance hole-size requirements
• Designed for repeated use in stainless steel, cast iron, and high-strength alloys

Compatibility

Designed as an OEM-style stub drill for use in standard drill chucks and drill press spindles accepting 7/16 inch shank drill bits.

Installation Notes

Install and remove this bit only when the drill press or hand drill is fully powered down and the chuck is stationary. Secure the bit firmly in the chuck and verify concentricity before beginning a drilling operation. Use appropriate cutting fluid or coolant when drilling stainless steel or other heat-sensitive alloys to preserve tool life. Always wear eye protection and secure the workpiece before drilling.

Technical Specifications

• Diameter: 7/16 inch
• Point Angle: 135 degrees
• Point Type: Split Point
• Length Style: Stub
• Material: Cobalt
• Weight: 0.95 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: SC400-028-I