screw lifter

screw lifter


A screw jack, also known as a screw lifter, is a mechanical device used to lift heavy loads vertically. It consists of a threaded screw shaft and a mating nut, which moves along the screw when rotated. This simple yet powerful mechanism allows for precise and controlled lifting in various industrial applications.

screw jack

What is a screw jack used for?

1. Construction industry

Screw jacks are commonly used in the construction industry to lift and support structures during the building process. They provide stability and help in evenly distributing the load, ensuring the safety of workers and the structural integrity of the building.

2. Automotive industry

In the automotive industry, screw jacks are utilized for lifting vehicles during repairs and maintenance. They offer a stable and secure platform for mechanics to access various parts of the vehicle, enabling efficient and safe work.

3. Industrial machinery

Screw jacks play a crucial role in industrial machinery, where precise and controlled lifting is essential. They are used for adjusting the height of conveyor belts, positioning heavy equipment, and providing support in manufacturing processes.

4. Aerospace industry

In the aerospace industry, screw jacks are employed in the assembly and maintenance of aircraft. They assist in lifting heavy components and ensure accurate alignment during the manufacturing and servicing of aircraft parts.

5. Entertainment industry

Screw jacks are also utilized in the entertainment industry to create dynamic stage setups. They enable the movement of platforms, props, and lighting fixtures, enhancing the visual experience for audiences.

screw jack

What is the working principle of screw jack?

1. Mechanical advantage

The working principle of a screw jack lies in the mechanical advantage gained through the screw thread. By rotating the screw shaft, a small amount of rotational force is converted into a larger vertical force, allowing for the lifting of heavy loads with ease.

2. Self-locking mechanism

Screw jacks employ a self-locking mechanism, which prevents the load from descending when the screw is not being rotated. This feature ensures the stability and safety of the lifted load, even in the absence of external power or support.

3. Linear motion

As the screw is rotated, the nut moves linearly along the screw shaft, facilitating vertical motion. This linear motion can be precisely controlled by adjusting the rotation of the screw, enabling accurate positioning and height adjustments.

4. Load distribution

The threaded screw and nut distribute the load evenly along their contact surfaces. This uniform distribution of force minimizes stress concentration and ensures that the load is supported securely and without excessive strain on any particular area.

screw jack

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

The main difference between a screw jack and a hydraulic jack lies in their mechanisms of operation. While both are used for lifting heavy loads, they function in distinct ways:

Screw jack:

A screw jack uses the mechanical advantage of the screw thread to lift loads vertically. It is manually operated or driven by an electric motor, offering precise control and stability. The lifting capacity of a screw jack is generally lower compared to a hydraulic jack.

Hydraulic jack:

A hydraulic jack utilizes the principle of hydraulic pressure to lift heavy loads. It consists of a hydraulic cylinder and a pump system, which pressurizes the hydraulic fluid to generate force for lifting. Hydraulic jacks can handle significantly higher loads and provide faster lifting speeds.

How to choose or customize the right screw jack?

1. Load capacity

Consider the maximum weight that the screw jack needs to lift. Ensure that the chosen screw jack has a load capacity that exceeds the intended load, allowing for a safety margin.

2. Travel distance

Determine the required vertical travel distance. Screw jacks are available in various lengths, and selecting the appropriate travel distance ensures that the load can be lifted to the desired height.

3. Operating environment

Take into account the environmental conditions in which the screw jack will operate. Factors such as temperature, humidity, and exposure to corrosive substances can influence the choice of materials and protective coatings for the screw jack.

4. Speed and precision

Consider the required lifting speed and precision. Some screw jacks offer higher lifting speeds, while others prioritize precise positioning. Choose a screw jack that aligns with the specific needs of your application.

5. Integration with other systems

If the screw jack needs to be integrated with other systems or equipment, ensure compatibility and explore customization options to meet the specific requirements of the application.

screw jack

About HZPT

As a leading manufacturer in China for industrial motors, gearboxes, and drives, HZPT is committed to technological innovation and delivering excellent quality products. Our product range includes micro gear motors, medium-sized gear motors, brake adjustable-speed motors, torque motors, DC motors, NMRV worm gear motors, bevel gear motors, WPRV worm gear reducers, rigid tooth surface bevel gear reducers, helical-worm gear reducers, parallel shaft helical gear reducers, spiral bevel gear reducers, worm screw lifts, rigid tooth surface gear reducers, and planetary gear reducers. These transmission products are widely used in various industrial production lines, such as transportation machinery, food machinery, medical machinery, printing machinery, textile machinery, packaging machinery, office equipment, and instruments. HZPT is the preferred choice for automation equipment.

Our advantages:

1. Technological innovation

HZPT is dedicated to staying at the forefront of technological advancements in the industry. We continuously invest in research and development to offer innovative solutions that meet the evolving needs of our customers.

2. Superior product quality

We prioritize the production of high-quality products that adhere to strict quality control standards. Our products undergo rigorous testing to ensure durability, reliability, and optimal performance in demanding industrial environments.

3. Extensive product range

With a wide range of transmission products, we provide comprehensive solutions for various applications. Our diverse product portfolio allows customers to find the most suitable screw jack and other transmission components for their specific requirements.

4. Customization options

We understand that each application has unique demands. Therefore, we offer customization options to tailor our products to specific customer needs. This ensures optimal performance and compatibility with existing systems.

5. Dedicated customer support

HZPT is committed to providing excellent customer service. Our knowledgeable team is available to assist customers throughout the entire process, from product selection to after-sales support. We strive to build long-term partnerships based on trust and satisfaction.

Choose HZPT as your trusted partner for screw jacks and other transmission products. Contact us today to discuss your specific requirements and experience the advantages of our high-quality solutions.


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.