AC110/220V Linear Actuator Reciprocating Motor + Speed Controller Stroke 160mm. Information: Stroke:160mm(The stroke from 50 to160mm, every 10mm there is a scale can be adjusted stroke by yourself). 1PCS AC Motor Linear Actuator (1PCS AC Speed Controller + 1PCS plug). The longer the stroke, the smaller the torque; the speed faster, the noise louder; if you use the speed controller to reducer the speed, the torque will be smaller; before you order, you need to confirm the torque, overload will burn down the motor! This Linkage Mechanism is an automatic constantly reciprocating linear actuator motor, which frequency is Variable. This machine output in an axle, the run speed on axis is Non-uniform. The speed faster, the noise louder. Linear motion part is consist of sliding linear ball bearing and steel axle. Axle need adds lubricating oil at regular intervals, in order to limited axle temperature less than 90 degrees, and oil wetness. Due to rotating lump is affected by gravity, the machine go and back speed is different. Thanks for your attention. We appreciate highly your cooperation. Any return of faulty items we will cover the return postal cost. Please note, if you don’t want the item for any other reason postal charges is yours. Any return, please send by recorded post only. If you didn’t receive the item, please wait for maximum 15 days and kindly inform us within 7 days.