We provide the customer with a wide variety of choices. Series of actuators can be driven by the AC/DC motors, synchronous motor and servo motor, with the wide range of load capacity from 10kg to 50 ton, and the screws can be matched with acme screw, ball screw, roller screws etc. A variety of protective accessories, over-load protection device, and mounting accessories enables our products .to satisfy the wide applications of the customers. The patented external shape design-unique rectangle fluted housing of the screw jack increases the heat-dissipation ability of the housing and extend the lifetime of the lubricant etc. The material of ductile cast iron raises the hardness and increase the efficiency and the wide application in low or high temperature environment of the housing. The design of the rectangle rear tube prevents the screw from self-rotating and the safety nut offers a guarantee to the security of the screw jack and monitors the wear degree of the nut.