... power:1.96-980(kN)2,lifting speed:0.0105-3.006(m/min)3,worm speed:70-1800(r/min)4,model ... With compact structure, small volume, light weight, power source extensively, no noise, easy installation, use agile, versatility, and supporting form more, reliability ... don't feel trouble direct contact with me JWM series Worm gear lead screw jacks