The smc pneumatic guided cylinder shall be installed on a flat surface. Once the guide rod is bent and twisted, the action resistance will surge, and the bearing will be quickly worn and the performance will decline. The sliding surface of the piston rod and guide rod shall not be damaged, so as to avoid damage to the seal and air leakage.The installation surface shall take into account that the piston rod retracts and allows the guide rod to extend out of the bottom surface. Prevent the hand from being clamped when the cylinder reciprocates.