Worm Gear Screw Jacks---Lude Transmission

If you need   screw jacks   or   screw jack system ,but not sure about the details.What should you do? Donot worry.   Just refer to the five questions below and come back to us with the answers. Then we will help you choose suitable model and make drawing for your confirmation. Q1:   The lift capacity is   ?   Kg (it means how many Kilos or KN the   screw jack   need to lift) The screw’s travel stroke is   ?   mm (it means the screw length, such as 400mm) The ratio? (it means how much time you want the screw to use to finish the travel stroke? Such as I want to use 10 Sec to finish the 400mm stroke, it means the speed requirement) Answer: I need lift   Kn (Kg) weight,  stroke is   mm,  I want to use   seconds to finish the stroke. Q2:   Which the screw top you need?   Answer:  I need ___(ABCDEF). Q3: Hand wheel driven (manual) or electric motor drive...

Sometimes customers look for screw jacks with anti-rotation function. Then lets us see more about anti-rotation device. When work screw rotation must be prevented, the Jacks can be realized with keyway along the Work Screw, a matching key (6) is fastened to the cover of the Jack which will eliminate Work Screw rotation. This design is only available for   translating screw jacks . If the structure/object connected to the lead screw is not prevented from rotating or the lead screw is not always in contact with the structure then a screw jack with an   “ Anti-Rotation ”   mechanism (keyed) should be used. For machine screw jacks the mechanism uses an internal key to prevent the lead screw from rotating. Anti-rotation device is suggested for limited strokes and low speed. The Anti-rotation device causes greater than normal wear on the Work Screw, somewhat reducing Jack life. For ball screw jacks a guided element fixed to the ball screw is used to prevent t...

The hand crank table's height can be adjusted through the manual screw jack. The   hand   crank screw jacks   mechanism usually includes cast iron crank, screw jack mechanism ,connecting shaft,flexible couplings and pillow block. Pillow block Connecting shaft Couplings Handwheel With the crank table loading capacity,lifting height,distance between screw jacks, we can give customers whole solution.When loading capacity is big, the guide support will be suggested. Because screw jacks are designed primarily to raise and lower axial loads and any side loads should be avoided. The jacks will withstand some side loads, depending on the diameter of the lifting screw and the extended length of the lifting screw. For most of table sizes is not small, when put the loads on the table, the loads is not uniform on the lifting screw, where side loads are present, the loads should be guided and the guides, rather than the screw jacks, should take the si...

Ball worm gear screw jack   is widely used for lifting.It has following advantages: • Are suitable for higher travel speeds and moderate to   high duty cycles • Move loads faster and with less horsepower • Are good for moving loads with longer continuous travel Ball screw is an important part of the   ball worm screw lift .How to maintain and store the ball screw? Let’s see the following information. Ball Screw Maintenance (Lubrication and Cleanliness) A ball screw must be properly lubricated and kept clean at all times. Otherwise its life will be reduced. When ball screws are not lubricated, the wear life drops by as much as 85-percent. Lubrication reduces friction, prevents corrosion and allows the ball screw to operate more efficiently. Oil and grease are both used for lubrication. Grease is not normally used in low temperature or high speed applications. Graphite grease or grease with suspended solid particles are never used because they tend to c...

  The difference between an upright and an   inverted screw jack   is the location at which the lifting screw exits the jack relative to the jack base. For example, an upright jack's lifting screw exits the jack opposite the base. An inverted jack's lifting screw exits the jack on the same side as the base. The choice between inverted and upright jack is dependent upon the application. The above picture shows the translating &   rotating screw jacks   in upright and inverted design. For ball screw jack ,upright and inverted design are also available. Note: An upright jack mounted upside down is still referred to as an upright jack.