... 15T,20T,30T,40T,50T,100T2.Configuration: worm and worm gear,bearing,housing and lead screw3.Function: Elevating, Lowering, Pulling, ... lifting speed,small sizes,easy installation,low noise,long life,security and environment protection.6.Loading Duty: Static Loading: 0 ... hand wheel,reducers,rubber Bellows,steel cover,bevel gearbox,Safety nut,frequency-inverter,brake,trunnion base,limit switches,coupling, ...