screw jack gearbox

screw jack gearbox


A screw jack gearbox is a mechanical device that converts rotary motion into linear motion. It is commonly used in various industries for lifting heavy loads and providing precise linear positioning. This article will explore the features, applications, and working principles of screw jack gearboxes.

1. What is a screw jack used for?

Screw jacks are versatile tools utilized in many industries due to their ability to lift and lower heavy loads with ease. The following points explain the common applications of screw jacks:

  • Lifting heavy machinery and equipment during installation or maintenance.
  • Adjusting the height or position of platforms, stages, and workbenches.
  • Actuating valves, dampers, and gates in industrial processes.
  • Supporting structures and providing stability in construction projects.
  • Controlling the tension of cables and wires in various applications.

screw jack

2. What is the working principle of screw jack?

The working principle of a screw jack is based on the mechanical advantage achieved through the rotation of a screw and the corresponding linear movement of a load. The following points explain the working principle of a screw jack:

  • Rotary motion: A motor or manual input rotates the screw.
  • Linear motion: As the screw turns, it moves the load in a linear direction.
  • Thread pitch: The pitch of the screw determines the amount of linear displacement per revolution.
  • Self-locking: The friction between the threads of the screw and the load prevents the load from sliding down when the screw is not rotating.
  • Efficiency: Screw jacks can achieve high mechanical efficiency, ensuring minimal power loss during operation.

screw jack

3. 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, they differ in their working principles and applications. The following points highlight the differences between screw jacks and hydraulic jacks:

  • Working principle: Screw jacks use mechanical advantage through the rotation of a screw, while hydraulic jacks utilize the force generated by a confined fluid.
  • Load capacity: Screw jacks are capable of handling heavier loads compared to hydraulic jacks.
  • Precision: Screw jacks offer precise positioning and are suitable for applications that require accurate adjustments.
  • Speed: Hydraulic jacks can lift loads at a faster rate compared to screw jacks.
  • Maintenance: Screw jacks are generally easier to maintain and repair than hydraulic jacks.

4. How to choose or customize the right screw jack?

When selecting or customizing a screw jack, it is essential to consider various parameters and specific conditions. The following points provide guidance on choosing or customizing the right screw jack:

  • Load capacity: Determine the maximum weight the screw jack needs to lift.
  • Lifting speed: Assess the required speed at which the load needs to be raised or lowered.
  • Travel distance: Calculate the vertical distance the load must be moved.
  • Environment: Consider the operating conditions, such as temperature, humidity, and presence of contaminants.
  • Mounting options: Evaluate the available space and the required mounting configuration.

screw jack

As a leading manufacturer of industrial motors, gearboxes, and drives in China, HZPT adheres to the principles of technological innovation and excellent quality. Our range of products includes:

  • Micro gear motors
  • Medium-sized gear motors
  • Brake speed control motors
  • Torque motors
  • DC motors

We also offer a wide selection of transmission products, such as NMRV worm gear motors, bevel gear motors, WPRV worm gear reducers, helical gear reducers, spiral bevel gear reducers, parallel shaft helical gear reducers, screw lift systems, and planetary gear reducers. These products find extensive applications in various industrial production lines, including transportation machinery, food machinery, medical machinery, printing machinery, textile machinery, packaging machinery, office equipment, and instrumentation.

By choosing HZPT as your screw jack supplier, you can benefit from the following advantages:

  • High-quality products that meet international standards
  • Customization options to suit specific requirements
  • Reliable performance and long service life
  • Competitive prices and efficient delivery
  • Excellent technical support and after-sales service

Partner with us and experience the superior quality and performance of our screw jack products. Contact us today for further information and inquiries.


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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.