Counterbore Cutter, Pilot Counterbore

HSS Pilot Counterbore Cutter / Step Counterbore Drill
Made of high-speed steel, sharp cutting edge, good rigidity.
Built-in pilot guide ensures accurate centering, avoids offset during countersinking.
Mainly used for machining counterbore holes to recess hex socket screws.
✅ Suitable materials: Carbon steel, aluminum alloy, copper, plastic
✅ Advantages:
• Integrated pilot design, high concentricity
• Smooth cutting, low burr
• Standard sizes match metric screw specs (M3~M24 optional)
• Straight shank, easy to install on CNC machines, drill presses
Great for machinery assembly, fixture processing, metal workshop.