screw jack lift

Screw Jack Lift: A Comprehensive Guide

A screw jack lift is a mechanical device used to lift heavy loads vertically or horizontally. It works by converting rotational motion into linear motion. Screw jacks are versatile and can be used in various industries including construction, manufacturing, and transportation. In this article, we will dive deeper into the world of screw jacks and explore their applications, working principle, differences from hydraulic jacks, and how to choose the right screw jack for your needs.

What is a Screw Jack Used For?

screw jack

  • Heavy Machinery: Screw jacks are used to lift and support heavy machinery during maintenance or repairs.
  • Construction: They can be used to lift heavy building materials, such as steel beams and concrete slabs.
  • Transportation: Screw jacks can be used to lift and lower trailers, trucks, and other vehicles for loading and unloading.
  • Automation: They can be integrated into automated systems to control positioning and movement of components.
  • Stage and Theater: Screw jacks are used to lift and lower stage props, lighting, and sound equipment.

What is the Working Principle of a Screw Jack?

screw jack

The working principle of a screw jack involves a screw shaft, which is rotated by a motor or hand crank. The screw shaft is threaded and rotates inside a cylindrical nut, which moves up and down along the screw as it rotates. The load is attached to the nut, and as the nut moves along the screw, it is lifted or lowered depending on the direction of rotation. The pitch of the screw threads determines the amount of linear motion produced by each rotation of the screw shaft.

  • Efficiency: Screw jacks have a high mechanical efficiency, typically around 50-60%, which means that only half of the input energy is lost to friction and heat.
  • Precision: They offer precise control over the lifting and lowering of loads, with fine adjustments possible by varying the rotation speed of the screw shaft.
  • Stability: Screw jacks are stable and can support heavy loads without the need for additional support structures.
  • Simplicity: They are simple in design and easy to operate, with minimal maintenance required.
  • Safety: Screw jacks can be equipped with safety features, such as limit switches and overload protection, to prevent accidents and damage to equipment.

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 used to generate the lifting force. Screw jacks use mechanical rotation to lift the load, while hydraulic jacks use the pressure of a fluid, such as oil or water. Screw jacks typically have a slower lifting speed but offer greater precision and stability, while hydraulic jacks can lift heavier loads quickly, but with less precision and stability.

How to Choose or Customize the Right Screw Jack?

screw jack

Choosing the right screw jack depends on several factors, including the weight of the load, the required lifting height, the operating environment, and the speed and precision required. Some important parameters to consider when selecting or customizing a screw jack include:

  • Load Capacity: The maximum weight that the screw jack can lift safely.
  • Lifting Height: The maximum vertical distance that the load can be lifted.
  • Screw Pitch: The distance between adjacent screw threads, which determines the amount of linear motion produced by each rotation of the screw shaft.
  • Gearing Ratio: The ratio of the input rotation of the screw shaft to the output linear motion of the load.
  • Operating Speed: The speed at which the screw jack can lift or lower the load.
  • Operating Temperature: The range of temperatures at which the screw jack can operate safely and reliably.

Introducing HZPT Screw Jacks

As a leading manufacturer of industrial motors, gearboxes, and drives, HZPT offers a wide range of high-quality screw jacks for various applications. Our screw jacks are designed to provide precise and reliable lifting and positioning of heavy loads, with customizable options to meet your specific needs.

Our Product Advantages

  • High Load Capacity: Our screw jacks can lift loads ranging from 0.5 tonnes to 100 tonnes, depending on the model and configuration.
  • Precision Positioning: With a screw pitch as low as 2mm, our screw jacks offer fine adjustments and precise control over the lifting height.
  • Sturdy and Durable: Our screw jacks are made from high-quality materials, such as cast iron and steel, to ensure long-lasting performance and resistance to wear and tear.
  • Customizable Options: We offer a variety of customizable options, such as different screw pitches, gearing ratios, and motor configurations, to meet your specific requirements.
  • Competitive Pricing: Our screw jacks are competitively priced without compromising on quality or performance, making them a cost-effective solution for your lifting needs.

At HZPT, we are dedicated to providing our customers with the best products and services. Contact us today to learn more about our screw jacks and how they can benefit your business.


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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.