MWJ & IMA SERIES-CLASSIC MODELS Worm gear screw jacks are used for lifting, lowering, traversing and swinging applications. Wide varieties models and large range of lifting forces facilitate large end applications. Classic: Foot print to match with German Actuator models WJ Series : Lifting capacity: 5,10,20,25,50,100,150,200.250.300,350,500, 750,1000,1500,2500 kN