house screw jack

House Screw Jack: A Comprehensive Guide

A screw jack, also known as a worm gear screw jack, is a mechanical device that transforms rotational motion into linear motion. It consists of a worm gear set and a lead screw, which move the lifting platform up and down. In this article, we will explore the use, working principle, and differences between screw jacks and hydraulic jacks. We will also provide guidance on how to select or customize a suitable screw jack for your specific needs.

What is a Screw Jack Used For?

Screw jacks have a wide range of industrial applications due to their high load capacity, precise positioning, and safety features. Here are some common uses:

  • Lifting heavy loads, such as industrial machinery, bridges, and buildings
  • Adjusting the height of work platforms, stages, and theatrical sets
  • Positioning solar panels, antennas, and satellite dishes
  • Controlling the tilt and vibration of large mirrors and telescopes
  • Maintaining precise tension in cable-stayed bridges and suspension bridges
  • Stabilizing and leveling machinery, such as printing presses and injection molding machines

screw jack

What is the Working Principle of Screw Jack?

The operational principle of a screw jack is based on the simple machine concept of a screw. When you turn the handle or motor attached to the worm gear set, the lead screw rotates, causing the lifting platform to move up or down. The pitch of the screw thread determines the amount of linear displacement per revolution of the lead screw. This allows for precise control of the lifting height and speed, making screw jacks an excellent choice for heavy-duty applications.

screw jack

What is the Difference between a Screw Jack and a Hydraulic Jack?

While both screw jacks and hydraulic jacks are used for lifting heavy loads, there are some significant differences between them. Here are some key points:

  • Screw jacks have a slower lifting speed and lower efficiency than hydraulic jacks.
  • Screw jacks require less maintenance and have a longer lifespan than hydraulic jacks.
  • Screw jacks can lift heavier loads than hydraulic jacks without the risk of oil leaks or hydraulic fluid contamination.
  • Screw jacks are more precise and controllable than hydraulic jacks, making them ideal for applications that require accurate positioning.
  • Screw jacks are more compact and easy to install than hydraulic jacks, which require more equipment and space.

How to Choose or Customize a Suitable Screw Jack?

Choosing the right screw jack for your specific needs requires careful consideration of several factors, including:

  • Load capacity: Determine the maximum weight that the screw jack needs to lift and select a model with a suitable load rating.
  • Lifting height: Calculate the vertical distance that the screw jack needs to move and choose a lead screw with the appropriate pitch and length.
  • Lifting speed: Determine the desired lifting speed and select a motor or handle with the appropriate gear ratio or speed control.
  • Environmental conditions: Consider the temperature, humidity, and corrosive factors of the working environment and choose a screw jack with suitable materials and coatings.
  • Mounting options: Decide on the best mounting method for your application, such as base, flange, or clevis mounts.

screw jack

Why Choose HZPT Screw Jacks?

As a leading manufacturer of industrial motors, reducers, and drive systems, HZPT offers a wide range of high-quality screw jacks to meet the needs of various industries. Here are some advantages of our products and services:

  • Customizable: We can design and manufacture screw jacks according to your specific requirements and technical specifications.
  • Durable: Our screw jacks are made of high-strength materials and undergo rigorous testing to ensure long-term performance and reliability.
  • Safe: Our screw jacks are equipped with various safety features, such as limit switches, emergency stop buttons, and overload protection devices.
  • Efficient: Our screw jacks have a high load capacity and low energy consumption, making them cost-effective and environmentally friendly.
  • Responsive: Our experienced engineers and sales team can provide timely technical support and customer service to ensure your satisfaction.

If you need a reliable and efficient screw jack for your applications, please contact us for more information and a free consultation.


Find us

Ep Screw Jack Co., Ltd.

Mail: [email protected]

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.