long screw jack

Long Screw Jack: The Ultimate Guide

A screw jack is a mechanical device that is used to raise or lower heavy loads. It is also known as a worm gear screw jack or a machine screw jack. The screw jack is operated by turning a handle, which rotates the screw. As the screw rotates, it moves the load up or down, depending on the direction of rotation. In this article, we will be discussing long screw jacks in detail, including their working principle, applications, differences from hydraulic jacks, and how to choose the right screw jack for your needs.

What is a Screw Jack Used For?

screw jack

A long screw jack is used primarily for heavy-duty lifting applications that require precise positioning. It is commonly used in industries such as construction, manufacturing, and transportation. Here are some of the most common applications of screw jacks:

  • Machine tools: Screw jacks are used to adjust the height of machine tools such as milling machines and lathes.
  • Construction: Screw jacks are used to lift and support structures during construction.
  • Transportation: Screw jacks are used to lift and level trailers, trucks, and other vehicles.
  • Material handling: Screw jacks are used to lift and lower heavy loads such as pallets and crates.
  • Entertainment: Screw jacks are used in theaters and concert halls to move sets and equipment.

What is the Working Principle of Screw Jack?

screw jack

The working principle of a screw jack is based on the relationship between rotational motion and linear motion. As the handle is turned, the screw rotates, causing the nut to move up or down the screw. This linear motion is used to lift or lower the load. Screw jacks use a worm gear drive to achieve high gear ratios, which allows for a large amount of force to be generated with relatively little effort.

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 way in which they generate force. Screw jacks use a mechanical advantage to generate force, whereas hydraulic jacks use hydraulic pressure. Screw jacks are generally slower than hydraulic jacks but are more precise and do not require a power source. Hydraulic jacks are faster and more powerful but are less precise and require a power source.

How to Choose or Customize the Right Screw Jack?

screw jack

Choosing the right screw jack for your needs requires considering several factors, including the load capacity, travel distance, speed, and accuracy. Other factors that may be important include the environment in which the screw jack will be used, the size and weight of the screw jack, and the level of precision required. Here are some key factors to consider:

  • Load capacity: The load capacity of the screw jack should be sufficient to handle the weight of the load.
  • Travel distance: The travel distance of the screw jack should be sufficient to meet the requirements of the application.
  • Speed: The speed of the screw jack should be appropriate for the application. In general, screw jacks are slower than hydraulic jacks but are more precise.
  • Accuracy: The level of accuracy required will depend on the application.
  • Environment: The environment in which the screw jack will be used should be considered. For example, if the screw jack will be used in a corrosive environment, a stainless steel screw jack may be required.

Why Choose HZPT Screw Jack?

As a leading manufacturer of industrial motors, gearboxes, and drive systems, HZPT offers a wide range of screw jacks to meet the needs of various industries. Here are some of the key advantages of choosing HZPT:

  • High-quality materials: Our screw jacks are made from high-quality materials to ensure durability and reliability.
  • Customization options: We offer a wide range of customization options to meet the specific needs of our customers.
  • Expertise: Our team of experts has extensive knowledge and experience in designing and manufacturing screw jacks.
  • Reliability: Our screw jacks are designed and manufactured to meet the highest standards of quality and reliability.
  • Competitive pricing: We offer competitive pricing to provide our customers with the best value for their money.

If you are looking for a reliable and high-quality screw jack, look no further than HZPT. Contact us today to learn more about our products and services.


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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.