What is the purpose of a stop tube in a cylinder?

The purpose of a stop tube in a cylinder is to prevent overextension. This component acts as a limiter for the moving parts within the cylinder, ensuring that they do not extend beyond a safe operating range. By restricting the movement, the stop tube protects the cylinder itself and attached components from damage that can occur due to excessive travel.

In hydraulic and pneumatic systems, avoiding overextension is crucial as it can lead to mechanical failure, loss of efficiency, or hazardous situations. The stop tube effectively maintains the integrity of the system by providing a physical barrier that defines the maximum allowable stroke of the cylinder, thereby ensuring safe and reliable operation.