motor screw jack

Motor Screw Jack: The Ultimate Guide

screw jack


Motor screw jack, also known as a mechanical actuator, is a versatile device used in various industries for lifting, lowering, or precisely positioning heavy loads. It consists of a motor-driven screw mechanism, which converts rotary motion into linear motion. In this comprehensive guide, we will explore the applications, working principle, differences from hydraulic jacks, and how to select or customize the right screw jack for your specific needs.

What is a screw jack used for?

Screw jacks find applications in multiple industries due to their precise and reliable lifting capabilities. Here are some common uses:

screw jack

  • Industrial automation: Screw jacks play a crucial role in automated manufacturing processes, such as assembly lines, material handling systems, and robotic applications.
  • Construction and engineering: They are used for lifting heavy loads, adjusting heights, and supporting structures in areas like bridge construction, stage setups, and industrial machinery installations.
  • Transportation: Screw jacks are employed in vehicle lifting systems, such as car lifts and truck tailgate lifts, for maintenance, loading, and unloading operations.
  • Agriculture: These jacks are utilized in agricultural machinery for adjusting the height of equipment, such as spreaders, seeders, and harvesters.
  • Renewable energy: Screw jacks are essential components in solar tracking systems and wind turbine maintenance platforms, ensuring optimal positioning and easy access for maintenance.
  • Healthcare: They are used in medical equipment, such as patient lifts and hospital beds, providing controlled movement and positioning for patient care.

What is the working principle of screw jack?

screw jack

The working principle of a screw jack involves the conversion of rotary motion to linear motion using a screw and nut mechanism. Here are the key aspects of its working:

  • Rotary motion input: The screw jack is driven by an electric motor, which rotates the input shaft.
  • Screw and nut mechanism: The input shaft is connected to a screw, and the screw engages with a nut. As the input shaft rotates, the nut moves linearly along the screw.
  • Lifting action: The linear motion of the nut translates into axial movement of the lifting mechanism, which raises or lowers the load.
  • Self-locking feature: The screw and nut design provides a self-locking ability, allowing the screw jack to hold the load in position without the need for continuous motor power.

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

While both screw jacks and hydraulic jacks serve the purpose of lifting heavy loads, there are significant differences between the two:

  • Power source: Screw jacks are powered by electric motors, while hydraulic jacks rely on hydraulic fluid pressure.
  • Mechanism: Screw jacks use a screw and nut mechanism for linear motion, whereas hydraulic jacks utilize a hydraulic piston to generate force.
  • Precision and control: Screw jacks offer precise positioning and control due to their threaded design, while hydraulic jacks provide faster lifting speed and higher load capacities.
  • Maintenance and operation: Screw jacks are generally easier to maintain and operate, as they do not require hydraulic fluid and have fewer components.
  • Application versatility: Screw jacks are suitable for a wide range of applications, including precise positioning, whereas hydraulic jacks excel in heavy-duty lifting tasks.

How to choose or customize the right screw jack

screw jack

Choosing or customizing the right screw jack requires careful consideration of various parameters and real-world conditions. Here are the key factors to keep in mind:

  • Load capacity: Determine the maximum load the screw jack needs to lift or support to ensure it can handle the required weight.
  • Travel speed: Consider the desired speed at which the screw jack needs to move the load, as it may influence the motor power and gear ratio selection.
  • Lifting height and stroke length: Define the required lifting height and stroke length to ensure the screw jack can accommodate the necessary range of motion.
  • Environmental conditions: Take into account the operating environment, including temperature, humidity, and exposure to dust, to choose a screw jack with suitable protection and sealing options.
  • Mounting and integration: Evaluate the available space and mounting options to ensure proper integration of the screw jack into your system or equipment.

HZPT: Your Trusted Screw Jack Manufacturer

As a leading manufacturer of industrial electric motors, gearboxes, and drive systems, HZPT is dedicated to pioneering technological innovation and delivering excellent product quality. Our extensive range of transmission products includes:

  • Micro gear motors
  • Medium-sized gear motors
  • Brake speed control motors
  • Torque motors
  • DC motors
  • NMRV worm gear motors
  • Spiral bevel gear motors
  • WPRV worm gear reducers
  • Rigid tooth face helical gear reducers
  • Helical-worm gear reducers
  • Parallel shaft helical gear reducers
  • Spiral bevel gear reducers
  • Worm-screw elevators
  • Rigid tooth face gear reducers
  • Planetary gear reducers

Our transmission products are widely used in various industrial production lines, including transportation machinery, food machinery, medical equipment, printing machinery, textile machinery, packaging machinery, office equipment, and instrumentation. They are the preferred choice for automated equipment.

Why Choose HZPT?

Here are five reasons why you should choose HZPT as your trusted screw jack supplier:

  1. Superior product quality: Our screw jacks are manufactured using high-quality materials and advanced production techniques, ensuring durability, precision, and reliable performance.
  2. Customization options: We offer a wide range of customization possibilities to meet your specific requirements, including load capacity, travel speed, stroke length, and mounting options.
  3. Technical expertise: With years of experience in the industry, our team of engineers and technicians possesses deep knowledge and expertise in screw jack design, ensuring optimal solutions for your applications.
  4. Prompt delivery: We understand the importance of timely delivery. Our streamlined production processes and efficient logistics enable us to deliver your screw jacks on schedule.
  5. Excellent customer support: We are committed to providing exceptional customer service. Our dedicated support team is always ready to assist you with any inquiries or technical assistance you may require.

Partner with HZPT for your screw jack needs, and experience the difference of working with a reliable and innovative manufacturer. Contact us today to discuss your requirements and start a fruitful collaboration.


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.