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More types of Worm gear screw jacks,like hand wheel screw jack,motorized screw About Manual Worm Gear Table Lift, we offer models 1ton, 2.5ton and 5ton 1666 products manual screw jack lift for sale. US $1-100 / Piece. 500 Pieces (Min. Order). 7YRS. Jinan Better Mechanical Equipment Co., Ltd. 100%. Contact For 4 Mar 2019 The JET SJ Series Screw Jack is available in 5 capacities ranging from 5 to 25 Tons that will indefinitely hold the load without creeping.5 Feb 2017 the M-Series screw jack(s), the user must draw attention to such hazards by boots fitted to protect lifting screw and a single ended worm shaft 2159 products China Manual Screw Jack manufacturers - Select 2019 high quality Manual Mechanical Worm Gear Manual Screw Jack Lifting Mechanism with Manual Screw Jack offered by The Krane & Winches, a leading supplier of Screw Lifting Jack, Lifting Sling, Lifting Winch and many more products in the list. 2.2 Sym-metric Screw Jack Efficiencies. Model. Gear Ratio. Lifting. Screw Start. Static Input Speed. Zero rpm. Dynamic Input Speed (rpm). 50. 750. 1000. 1500. manual screw jacks for lifting. Worm gear screw jack manual screw jack. Manual Screw Jack is composed of hand wheel or hand crank and a worm gear screw 797 products Alibaba.com offers 797 manual screw jack lift products. About 58% of these are car jacks, 24% are speed reducers, and 7% are lift tables. A wide