... 5T,10T,15T,20T,30T,40T,50T,100T2.Configuration: worm shaft,worm gear,bearing,oil seal,housing and lifting Screw3.Function: ... Positioning precision,Safely self-locking,Heavy duty,Uniform lifting speed,small sizes,easy installation,low noise,long life,security and ... ,Ordinary Motor,hand wheel,rubber Bellows,steel cover,bevel gearbox,frequency-inverter,brake,trunnion base,limit switches,coupling,link ...