The function of the shock absorber is to give full scope to its damping force that happens when the piston rod moves up and down There are two ways to test the damping force, namely pulling (piston rod moves up) and compressing (piston rod moves down). Generally, to test the damping force, three velocities test point-0.1m/s for the low speed , 0.3m/s for the middle speed, and 0. 6m/s for the high speed, are set on the testing machine, the quality of damping force depends greatly on the designer\'s working experience .
