Holding- This mechanism is used in hold the heavy loads to replace the components inside.Ĥ. Adjusting- This mechanism is also used in adjusting and moving heavyweights such as scaffolding pipes in various industries like civil and mechanical.ģ. This mechanism is also used in fixing errors in a vehicle like cars, trucks, buses etc.Ģ. Assembling- This is used to assemble the vehicle parts while lifting the base of the vehicle up using a screw jack mechanism. Here are some common jackscrew uses, given below-ġ. Screw jacks are modern equipment used in various industries which can be easily seen around you here and there to lift the heavy loads using marginal efforts. The velocity ratio of differential screw jack–Īnd, The mechanical advantage of differential screw jack. Therefore, the total distance travelled by both of the threads- P A-P B When the lever arm moves clockwise, portion A will go down toward the base nut and this cause to uplift of portion B and vice-versa, hence lifting the load with less amount of effort than a simple jackscrew. The internal threading will give space to rotate Portion B inside. The outer thread of portion A will rotate with the base nut with a fixed lever arm on the top of the A portion, as you can see in the figure. The A portion is threaded internally and externally. This mechanism consists of two different screw threads A and B, shown in the figure. Now, Let’s see the diagram of the differential screw jacks. So, the difference between the thread sizes and their pitches is the cause behind the name of differential jack. Now, you may be wondering, why it is called differential jackscrew? A differential screw jack provides an increased velocity ratio as compared to a simple screw jack. It is also known as a compound screw jack or Hunter screw jack. The same effort is required to lift larger loads than a simple screw jack. Η= (M.A/V.R)×100 Differential Screw Jack-Ī differential screw jack is an upgraded version of a simple screw jack where a differential screw is used to increase the velocity ratio of the differential screw jack. Where W= applied load and P= applied effort.Īnd, the efficiency of a simple jackscrew, The Mechanical advantage of a simple screw jack, Where D= diameter of the head and p= pitch gap The velocity ratio of a simple screw jack, Related: Simple Screw Jack and Their Application The application of the simple screw jack is in car lifting, heavy-vehicle lifting to repair or change the damaged equipment and so on. Lastly, the head where the existing load is applied to lift by applying less effort. This lead screw is used in various heavyweight machines like lathe machines, drill machines etc. The lead screw counts as the best screw to lift heavyweight. The threaded area is consists of the lead screw with square thread. This is also known as a Manual screw jack.įirstly, the cone-shaped base area is given to support the lifting mechanism, and above the base, the bolt is given to regulate the square shape thread and prevent it from slipping, when the load is applied. This rotation causes to climb up and down the linear pitches or threads and thus load moves up and down with less effort applied.Ī simple screw jack is a simple lifting machine, where a simple mechanism of lifting is used to lift the heavy loads applying marginally less effort. When the load is placed on the head, it can be lifted up and down by rotating the lever arm or handle in the clockwise direction and vice-versa. The Screw thread situated on the nut is the heart of the screw jacks. According to the professional design and advanced technology, all products are manufactured in strict accordance with EN74 and BS1139 standards, quality guarantee, ensure construction safety and personnel safety.The main working principle behind the jackscrew is the inclined plane. After passivation and surface galvanized anti-rust treatment, it is corrosion resistance is better than the ordinary coupler, longer service life. C. Anti-rust treatment, longer service life. B. Advanced technology, better performance Products using advanced technology, avoid the production malpractice of old craft, causes the product the anti-deformation and the anti-stretching performance to be stronger, more fits the scaffolding, more firm, not easy to slide. Quality assurance, more resistance to falls, improve the efficiency of scaffolding removal, saving time. Bolt-The bolt is 8.8 grade high-strength bolt, which ensures the quality. Material-The product material is Q235 carbon steel which is higher than the standard as the raw material. Scaffolding Adjustable Solid Screw Base JackĪdjustable Solid Screw Jack Base for ScaffoldingĬompetitive price, High-quality products, 24-hour after-sales serviceĢ. Product Advantage A. High quality materials, higher quality.
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