Worm screw lift more than ordinary screw lift is simple and easy to operate. We see the construction site, then the top floor, at the time the building was not in the house built in layers, are needed outside help to cover the outside layers. Because height is too high, you need outside help, people can go. Then you need a simple and easy to operate tool for sending people to go, which can be used in a worm screw lift, which lifts the relatively small size and relatively light weight jwm005 screw lift, saving time during operation effort. The most important thing is safe swl35 screw lift, more reliable. Benefits worm screw lift are still many, the next say. Love to answer every screw lift, sweepstakes Surprise ~ asker adopt a trapezoidal thread, in particular: _ screw machine model specifications (mm) SWL2.5_ Tr30x6 SWL5_ Tr40x6 SWL10_ Tr58x12 SWL15_ Tr65x12 SWL20_ Tr90x16 SWL25_ Tr110x18 SWL35_ Tr1110x20 SWL100_ Tr150x23 SWL120_ Tr180x25 above models and specifications are referring to a company Huai'an product (performance standards JB / T8809-1998) In my experience, in fact, different manufacturers, models corresponding screw specifications will be a little different, that I did not understand the Why, they may be the standard implementation of the differences. Handan screw worm screw lift lifts _ _ Runchi gear reducer by Texas Runchi Limited. Texas Runchi reducer Limited (www.sddzjsj.com) strong, credible, in Dezhou reducer, gearbox industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Runchi reducer and you hand into the brilliant, for a better future!