square thread screw jack

H1: square thread screw jack

Square Thread Screw Jack

screw jack


A square thread screw jack is a type of mechanical device used for lifting heavy loads or applying a controlled linear force. It consists of a threaded rod (screw) and a nut, which work together to convert rotational motion into linear motion. This article will explore the various aspects of square thread screw jacks and their applications in different industries.

What is a screw jack used for?

screw jack

1. Industrial Machinery

Screw jacks are commonly used in industrial machinery for lifting and positioning heavy equipment, such as conveyor systems, packaging machines, and printing presses. They provide a reliable and precise method of adjusting the height or position of these machines.

2. Construction and Infrastructure

In construction and infrastructure projects, screw jacks are utilized for tasks like raising formwork, adjusting support beams, or lifting heavy structures. Their ability to handle significant loads and provide stable support makes them ideal for these applications.

3. Automotive Industry

Screw jacks play a crucial role in the automotive industry, particularly in vehicle assembly lines and maintenance facilities. They are used for lifting cars or heavy vehicle parts during assembly, repair, and maintenance operations.

4. Aerospace and Aviation

In the aerospace and aviation sectors, screw jacks are employed for various purposes, including raising aircraft components, adjusting control surfaces, and positioning equipment in maintenance hangars. They offer high load capacity and precise control, ensuring safety and accuracy in critical operations.

5. Entertainment and Stage Production

Screw jacks find applications in the entertainment industry, especially in stage productions and theater settings. They are used for lifting and adjusting stage equipment, scenery, and lighting rigs, enabling smooth and seamless performances.

screw jack

What is the working principle of screw jack?

1. Rotational Motion to Linear Motion Conversion

A screw jack operates on the principle of converting rotational motion into linear motion. When the screw is rotated using a handle or motor, the threads on the screw engage with the nut, causing it to move along the length of the screw.

2. Mechanical Advantage

The square thread design of the screw and nut provides a mechanical advantage, allowing a relatively small input force to generate a significant output force. This makes screw jacks capable of lifting heavy loads with ease.

3. Self-Locking Feature

Screw jacks have a self-locking feature, meaning that they can hold a load in position without the need for continuous input force. This makes them suitable for applications requiring load holding or supporting over extended periods of time.

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

1. Power Source

A screw jack is powered by manual operation or an electric motor, whereas a hydraulic jack uses hydraulic fluid and a pump to generate force.

2. Load Capacity

Screw jacks typically have lower load capacities compared to hydraulic jacks. However, they are more compact and suitable for lifting lighter loads or applications where space is limited.

3. Control and Precision

Hydraulic jacks offer greater control and precision in lifting and positioning due to the hydraulic fluid’s ability to provide smooth and continuous force. Screw jacks, on the other hand, provide more incremental and step-by-step adjustments.

How to choose or customize the appropriate screw jack?

screw jack

1. Load Capacity

Consider the maximum load the screw jack needs to lift or support. Choose a screw jack with a load capacity that exceeds the application’s requirements to ensure safe and reliable operation.

2. Travel Distance

Determine the necessary travel distance or stroke length of the screw jack. This will depend on the specific application and the range of vertical movement required.

3. Speed and Efficiency

Evaluate the desired speed and efficiency of the lifting process. Higher efficiency screw jacks may be preferred for applications requiring frequent or rapid adjustments.

4. Environmental Conditions

Consider the operating environment, including factors such as temperature, humidity, and exposure to corrosive substances. Choose a screw jack with appropriate materials and protective coatings to ensure durability and longevity.

5. Integration and Customization

If necessary, explore options for customization to meet specific requirements. This may include modifications to dimensions, mounting arrangements, or additional features to enhance the screw jack’s performance in a particular application.

About HZPT

As a leading manufacturer of industrial motors, gearboxes, and drives, HZPT is committed to technological innovation and superior quality. Our wide range of products includes miniature gear motors, medium-sized gear motors, brake speed motors, torque motors, DC motors, NMRV worm gear motors, bevel gear motors, WPRV worm gear reducers, rigid face bevel gear reducers, helical-worm gear reducers, parallel shaft helical gear reducers, spiral bevel gear reducers, worm screw lifts, rigid face gear reducers, planetary gear reducers, and other transmission products.

Our products are widely used in various industrial production lines, including transportation machinery, food machinery, medical machinery, printing machinery, textile machinery, packaging machinery, office equipment, instrumentation, and more. We pride ourselves on being the preferred choice for automation equipment.

Why choose our screw jack products:

1. High Load Capacity

Our screw jacks are designed to handle heavy loads, ensuring reliable and safe lifting operations even under demanding conditions.

2. Precise Positioning

With their precise lifting and positioning capabilities, our screw jacks enable accurate adjustments and support in various industrial applications.

3. Compact and Durable

Our screw jacks are compact yet sturdy, making them suitable for space-constrained environments without compromising on durability and performance.

4. Versatile Applications

Whether it’s in industrial machinery, construction, automotive, or entertainment, our screw jacks offer versatility and adaptability for diverse application needs.

5. Customization Options

We offer customization options to meet specific requirements. Our experienced team can work closely with customers to tailor the screw jack design and specifications accordingly.


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.