gear jack

What is Gear Jack and How Does It Work?

Gear jack is a type of mechanical jack that uses a screw thread to lift heavy loads. It is widely used in various industrial applications, such as transportation machinery, food machinery, medical machinery, printing machinery, textile machinery, packaging machinery, office equipment, and instruments, etc.

screw jack

What is a screw jack used for?

  • Load Lifting: Screw jacks are commonly used for lifting heavy loads in various applications, such as bridges, buildings, and heavy machinery.
  • Positioning: Screw jacks can also be used for precise positioning of machinery and equipment, making it perfect for use in various industrial applications.
  • Tensioning: Screw jacks are used in various applications to apply tension to cables, chains, and other components.
  • Pressing: Screw jacks can be used for pressing components together, such as in automotive assembly.
  • Clamping: Screw jacks can be used for securely clamping components in place, making it ideal for use in woodworking and metalworking applications.

screw jack

What is the working principle of screw jack?

The working principle of screw jack is based on the concept of simple machines, which involves applying a smaller force over a longer distance to lift a heavy load. It consists of a helical screw thread that is attached to a motor or a manual crank. When the screw is rotated, it moves the load up or down depending on the direction of rotation. The screw thread is usually made of steel, and it is designed to resist shear forces and bending moments. The load-carrying capacity of a screw jack is determined by the thread pitch, diameter, and the material used.

screw jack

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

The primary difference between a screw jack and a hydraulic jack is the method used to apply force. A screw jack uses a mechanical screw thread to lift heavy loads, while a hydraulic jack uses pressurized fluid to lift loads. Screw jacks are generally slower and less powerful than hydraulic jacks, but they are more precise and require less maintenance. Hydraulic jacks are generally faster and more powerful than screw jacks, but they require more maintenance due to the hydraulic fluid and the potential for leaks.

How to choose or customize a suitable screw jack?

When choosing or customizing a suitable screw jack for your application, there are several factors to consider:

  • Load Capacity: The load capacity of the screw jack should be greater than the maximum load that needs to be lifted.
  • Lift Height: The lift height of the screw jack should be greater than the maximum height that needs to be lifted.
  • Screw Pitch: The screw pitch should be selected based on the required lifting speed and the load capacity.
  • Screw Diameter: The screw diameter should be selected based on the torque required to lift the load and the load capacity.
  • Material: The material used in the screw jack should be selected based on the application requirements, such as resistance to corrosion, temperature, and chemicals.

screw jack

HZPT – Your Trusted Supplier of Screw Jacks

As a leading manufacturer of industrial electric motors, gear reducers, and drive components, HZPT has been providing high-quality products and outstanding service to customers around the world for many years. Our screw jacks are designed and engineered to meet the specific needs and requirements of our customers, and we offer a wide range of models to choose from.

Here are some of the advantages of our screw jacks:

  • High load capacity, up to several hundred tons
  • Precise positioning and movement control, with high repeatability
  • Low noise and vibration, thanks to the use of high-quality materials and advanced manufacturing techniques
  • Long service life, with minimal maintenance requirements
  • Customizable options, such as different screw pitches, diameters, materials, and mounting configurations

At HZPT, we are committed to providing our customers with the best possible solutions at competitive prices. Contact us today to learn more about our screw jacks and how we can help you with your lifting and positioning needs.


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.