screw jack for lifting house

Screw Jack for Lifting House


A screw jack is a mechanical device used for lifting heavy loads or applying great force in a linear motion using a screw mechanism. It is commonly used in various industries, including construction, automotive, and manufacturing. In this article, we will explore the uses, working principle, and differences between a screw jack and a hydraulic jack. We will also provide guidance on how to select and customize the right screw jack for specific requirements.

screw jack

What is a Screw Jack Used For?

1. Lifting Heavy Structures

A screw jack is frequently used for lifting heavy structures, such as houses, bridges, or large machinery. Its robust design and high load-bearing capacity make it ideal for these applications.

2. Leveling and Alignment

Screw jacks are also used for leveling and aligning various equipment and structures. They provide precise control over the height and angle adjustments, ensuring stability and accuracy.

3. Load Testing

When testing the load-bearing capacity of structures or equipment, screw jacks are often employed. By gradually applying force, they help determine the maximum load a structure or equipment can withstand.

4. Positioning and Adjustment

Screw jacks are commonly used for positioning and adjusting heavy machinery or components during installation or maintenance. They allow for precise movements and ensure proper alignment.

5. Emergency Rescue Operations

In emergency situations, such as lifting a vehicle to free a trapped person, screw jacks can be used as a reliable and effective solution. Their strength and stability make them suitable for rescue operations.

screw jack

What is the Working Principle of Screw Jack?

1. Screw and Nut Mechanism

The main working principle of a screw jack involves the interaction between a screw and a nut. As the screw rotates, it moves through the fixed nut, causing linear motion of the load or platform attached to the screw.

2. Mechanical Advantage

Screw jacks utilize the principle of mechanical advantage. By using a long thread and a small pitch, they can multiply the input force, allowing for heavier loads to be lifted with less effort.

3. Self-Locking Feature

Screw jacks have a self-locking feature, which means that the load remains suspended even when no force is applied. This provides enhanced safety and prevents unintentional lowering of the load.

4. Manual or Motorized Operation

Screw jacks can be operated manually using a rotating handle or with the help of an electric motor. Motorized screw jacks offer greater convenience and efficiency, especially for heavy-duty applications.

5. Lubrication and Maintenance

To ensure smooth operation and longevity, screw jacks require regular lubrication and maintenance. Applying suitable lubricants and inspecting the components for wear and tear are essential for optimal performance.

screw jack

What is the Difference Between a Screw Jack and a Hydraulic Jack?

The main differences between a screw jack and a hydraulic jack are:

1. Power Source

A screw jack is typically powered manually or by an electric motor, while a hydraulic jack relies on hydraulic fluid and a pump to generate force.

2. Load Capacity

Screw jacks are generally designed for heavier loads, with higher load capacity compared to most hydraulic jacks.

3. Speed and Efficiency

Hydraulic jacks are known for their faster operation and higher efficiency, making them suitable for applications that require quick lifting or repeated use.

4. Maintenance and Leakage

Screw jacks are relatively easier to maintain and do not suffer from hydraulic fluid leakage, which is a common issue with hydraulic jacks.

5. Precision and Control

Screw jacks provide finer control and precision in positioning and alignment compared to hydraulic jacks, making them preferable for applications that demand accurate adjustments.

Choosing and Customizing the Right Screw Jack

When selecting or customizing a screw jack, several parameters and practical considerations should be taken into account:

1. Load Capacity

Consider the maximum weight the screw jack needs to lift or support. Ensure the chosen screw jack has a load capacity that exceeds the required weight.

2. Travel Distance

Determine the vertical travel distance needed. Screw jacks are available in various sizes and lengths, allowing for customization based on specific requirements.

3. Speed and Efficiency

Depending on the application, consider the required speed and efficiency of the screw jack. Motorized screw jacks offer faster operation and higher efficiency.

4. Safety Features

Check for safety features such as overload protection, limit switches, and emergency stop mechanisms to ensure safe operation and prevent accidents.

5. Environmental Conditions

Consider the operating environment, including temperature, humidity, and exposure to corrosive substances. Choose a screw jack with appropriate materials and protective coatings to withstand these conditions.

screw jack

As a leading manufacturer of industrial motors, gear reducers, and drives, HZPT adheres to the philosophy of “Leading Technological Innovation, Achieving Excellent Quality.” 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, worm gear reducers, parallel shaft helical gear reducers, helical bevel gear reducers, worm screw lifts, rigid tooth surface gear reducers, and planetary gear reducers. 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, our products are the preferred choice for automated equipment.

Why Choose HZPT Screw Jacks?

1. High Load Capacity

Our screw jacks are designed and engineered to withstand heavy loads, ensuring reliable lifting and positioning of structures and equipment.

2. Precision and Control

With precise screw and nut mechanisms, our screw jacks provide accurate positioning and alignment, allowing for fine-tuned adjustments.

3. Durability and Longevity

Constructed with high-quality materials and advanced manufacturing processes, our screw jacks are built to last, even under demanding conditions.

4. Safety Features

Our screw jacks are equipped with safety features like overload protection and emergency stop mechanisms, ensuring safe operation and preventing accidents.

5. Customization Options

We offer a wide range of customization options, including load capacity, travel distance, speed, and various accessories, to meet specific customer requirements.

Partner with HZPT for reliable and high-performance screw jacks that can enhance your lifting and positioning operations. Contact us today to discuss your specific needs and find the perfect solution for your application.


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.