screw jack engineering





screw jack engineering

screw jack engineering

A screw jack is a simple mechanical device that is used to lift heavy loads or apply great forces. It is a type of jack that is operated by turning a screw, which moves a load-bearing collar up and down the length of the screw.

screw jack

What is a screw jack used for?

  • Construction: screw jacks are commonly used in construction for lifting heavy loads, such as concrete slabs or steel beams.
  • Manufacturing: screw jacks are used in manufacturing to support or position large equipment, or to apply pressure in pressing operations.
  • Transportation: screw jacks are used in transportation to lift and support vehicles, such as trains or buses, for maintenance or repair work.
  • Mining: screw jacks are used in mining to support and stabilize tunnels, or to lift and move heavy equipment.
  • Automation: screw jacks can be used in automated systems to precisely position or move objects, such as in robotics or assembly lines.

screw jack

What is the working principle of screw jack?

  • The screw: the screw is the main component of a screw jack. It is a long, threaded rod that runs through a nut and a load-bearing collar.
  • The nut: the nut is a component that fits onto the screw and moves up and down as the screw is turned. It is typically made of bronze or other materials that offer low friction.
  • The load-bearing collar: the load-bearing collar is a component that sits on top of the nut and supports the load. It is often made of steel or other strong materials.

The working principle of a screw jack is based on the properties of the screw. When the screw is turned, the nut moves up or down along the length of the screw, depending on the direction of the rotation. This movement of the nut causes the load-bearing collar to move up or down as well, lifting or lowering the load.

screw jack

What is the difference between a screw jack and a hydraulic jack?

The main difference between a screw jack and a hydraulic jack is the method by which they lift loads. While a screw jack uses a mechanical screw to lift the load, a hydraulic jack uses hydraulic fluid and a piston to apply force. This means that hydraulic jacks can often lift heavier loads than screw jacks, but they are also more complex and expensive.

How to choose or customize the right screw jack?

  • Load capacity: the first consideration when choosing a screw jack is its load capacity. This is the maximum weight that the screw jack can lift, and it is determined by the size and strength of the screw, nut, and load-bearing collar.
  • Lift height: the lift height is the distance that the load-bearing collar can travel along the length of the screw. This is an important consideration if the screw jack will be used in a space with limited vertical clearance.
  • Screw pitch: the screw pitch is the distance between the ridges of the screw, and it determines how much the load-bearing collar will move up or down with each turn of the screw. A smaller pitch will provide finer control over the lift height, while a larger pitch will allow for faster lifting.
  • Environmental conditions: depending on the operating environment, it may be necessary to choose a screw jack that is resistant to corrosion, extreme temperatures, or other factors that could affect its performance.
  • Mounting options: screw jacks can be mounted in a variety of ways, including base mounting, clevis mounting, and flange mounting. The mounting option will depend on the specific application and the available space.

screw jack

About HZPT

As a leading manufacturer of industrial motors, gear reducers, and drives, HZPT has a wide range of products to meet the needs of customers in various industries. Our products include micro gear motors, brake speed-adjustable motors, torque motors, DC motors, NMRV worm gearboxes, bevel gearboxes, WPRV worm gear reducers, rigid face gear reducers, spiral bevel gear reducers, parallel axis helical gear reducers, helical-worm gear reducers, screw lifters, planetary gear reducers, and other transmission products.

Our products are widely used in transportation machinery, food machinery, medical machinery, printing machinery, textile machinery, packaging machinery, office equipment, and instrumentation, making them the preferred supporting products for automated equipment.

Here are some advantages of our screw jack products:

  • High load capacity: our screw jacks are designed with heavy-duty screws, nuts, and load-bearing collars to ensure reliable lifting of heavy loads.
  • Precision lifting: our screw jacks have a high screw pitch, which allows for precise control over the lift height with each turn of the screw.
  • Customizable options: we offer a range of mounting options, lift heights, and load capacities to suit the specific needs of each customer.
  • Corrosion resistance: our screw jacks are made with materials that are resistant to corrosion, making them suitable for use in harsh environments.
  • Ease of maintenance: our screw jacks are designed for easy maintenance, with simple components that can be easily replaced if necessary.


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Ep Screw Jack Co., Ltd.

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As one of leading manufacturers, suppliers and exporters of mechanical products in China, We offer reducers, sprockets, industrial and conveyor chain, belts, pulleys, gears, racks, gearboxes, motors, PTO Shafts, taper lock Bushing, vacuum Pumps, screw air compressors and many other products. Please contact us for details.