Driving a pin out of a shaft requires a tool that fits the hole exactly. A pin punch has a flat tip and a uniform shaft length to push pins completely through their bores. They come in precise sizes like 1/8 or 3/16 inch. Always use a starting punch first to break the pin loose before switching to a pin punch. If you bend the punch, discard it. A bent punch will scrape the bore walls or jam inside the hole.
Mechanic Glossary
Pin Punch
A narrow, straight metal rod used with a hammer to drive out retaining pins, dowels, or rivets from mechanical assemblies.
Frequently Asked Questions
Center punches have a sharp, pointed tip to mark drilling points. Pin punches have a flat, straight tip to push pins out of holes.
You likely used a punch that was too thin for a tight pin, or you struck it at an angle. Always keep the punch perpendicular to the pin.
You can grind the tip flat if it chips, but if the main shaft bends, grinding will not fix it. A bent shaft will jam in the pin hole.