What is an internal cushion primarily used for?

An internal cushion is primarily designed to provide gradual deceleration at the end of a cylinder stroke. This feature is especially important in pneumatic systems where components can be subject to sudden stops. Without proper cushioning, the impact created when the cylinder reaches the end of its stroke could cause excessive wear or damage to both the cylinder itself and any connected machinery.

By incorporating an internal cushion, the airflow through the cylinder is adjusted, allowing for a slowing down of the piston just before it reaches the end of its travel. This results in a smoother motion and reduces the chances of jarring impacts that typically occur during rapid extension or retraction. A properly functioning cushion helps extend the lifespan of pneumatic components and improves overall system efficiency by minimizing abrupt stops.