Piston Pin

A piston pin, also known as a wrist pin or gudgeon pin, is a cylindrical metal component that connects the piston to the connecting rod in an internal combustion engine. It serves as a pivot point for the piston, allowing it to move up and down within the cylinder bore.

The piston pin is typically made of hardened steel or alloy, and it is designed to withstand high temperatures and pressures. It is inserted through the small end of the connecting rod and secured in place with retaining clips or circlips.

The piston pin plays a crucial role in the engine's operation by transmitting the force generated by the combustion process from the piston to the connecting rod. It must be strong enough to handle the forces exerted on it, yet lightweight to minimize reciprocating mass and reduce friction.

Overall, the piston pin is an essential component in the engine's piston assembly, ensuring smooth and efficient operation of the internal combustion engine.