#55 (.0520") Counterbore Drill .400" LOC 1/8" Shank Carbide 18-Pack

#55 (.0520") Solid Carbide Counterbore Drill – 18 Piece Pack

This precision-ground solid carbide counterbore drill is designed to drill a pilot hole and produce a flat-bottom counterbore in a single operation. Ideal for PCB and CNC applications where accuracy and efficiency are critical.

• Drill Diameter: #55 (.0520")
• Flute Length (LOC): .400"
• Shank Diameter: 1/8"
• Overall Length (OAL): 1.50"
• Material: Solid Carbide
• Quantity: 18 Pieces

Combined Drill & Counterbore Design:
Drills the pilot hole and forms a flat-bottom counterbore in a single operation, improving alignment and reducing machining time.

Flat-Bottom Counterbore Geometry:
Produces a flat seating surface suitable for fasteners and precision components.

Solid Carbide Construction:
Provides rigidity and wear resistance for consistent performance in abrasive materials and high-speed CNC applications.

Common Applications:

• PCB fabrication and electronics work
• FR4, G10, and laminates
• Plastics and composites
• Light metals
• Precision counterbored holes