screw hoist

Screw Jack: Understanding the Working Principle and How to Choose the Right One

screw jack

What is a Screw Jack Used for?

Screw jacks are a type of mechanical actuator used for lifting heavy loads or applying great forces with minimum effort. They are typically used in applications where precise positioning, smooth movement, or longevity is necessary. The following are some common uses of a screw jack:

1. Lifting Platforms

Screw jacks are commonly used to lift large platforms in industrial settings, such as stage platforms in theaters or platforms in loading docks.

2. Adjusting Height

Screw jacks are ideal for adjusting the height of machinery or equipment, such as adjusting the height of a conveyor belt, medical operating tables, or drill press tables.

3. Moving Heavy Loads

Screw jacks can be used to move heavy loads, such as lifting a car for maintenance or positioning large pieces of equipment in a factory.

4. Applying Force

Screw jacks can also be used to apply force, such as in the calibration of machines or the tensioning of wires.

5. Stabilization

Screw jacks are also used for stabilization, such as in the construction of buildings or bridges.

screw jack

What is the Working Principle of Screw Jack?

Screw jacks work according to the principle of the screw and nut. The lifting mechanism consists of a screw, which is rotated by a motor or by hand, and a nut that moves along the length of the screw, either up or down.

As the screw rotates, the nut either moves up or down the screw, depending on the direction of the rotation. The nut is connected to a lifting platform or load, which is moved up or down along with the nut.

Screw jacks can operate in two ways: self-locking and non-self-locking. Self-locking screw jacks can hold the load without the need for a brake or locking mechanism. Non-self-locking screw jacks require a brake or locking mechanism to hold the load in place.

Screw jacks can be powered by electric motors, hand cranks, or pneumatic or hydraulic systems.

screw jack

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

Screw jacks and hydraulic jacks are both devices used for lifting heavy loads or applying force. However, there are some key differences between the two:

1. Operation

Screw jacks are operated by a motor or by hand, while hydraulic jacks are powered by hydraulic fluid.

2. Capacity

Screw jacks can lift heavier loads than hydraulic jacks.

3. Precision

Screw jacks offer greater precision and control over the lifting process than hydraulic jacks.

4. Maintenance

Screw jacks require less maintenance than hydraulic jacks.

5. Cost

Screw jacks are generally less expensive than hydraulic jacks.

How to Choose or Customize the Right Screw Jack?

Choosing the right screw jack depends on several factors, including load capacity, lifting height, speed, and duty cycle. Some of the key parameters to consider include:

1. Load Capacity

Screw jacks are rated for load capacity, and it is important to choose a jack that can handle the weight of the load being lifted.

2. Lifting Height

The lifting height of the screw jack should be sufficient for the intended application.

3. Speed

Screw jacks come in different speeds, so it is important to choose one that can lift the load at the required speed.

4. Duty Cycle

The duty cycle refers to the amount of time the screw jack can be operated continuously. It is important to choose a screw jack with a duty cycle that can handle the demands of the application.

5. Environmental Conditions

The environment in which the screw jack will be used should also be considered. Factors such as temperature, humidity, and corrosive elements may affect the choice of screw jack.

At HZPT, we specialize in the production and sale of screw jacks. Our screw jacks are designed to meet the highest standards of quality and performance, and are suitable for a wide range of industrial applications. Some of the advantages of our products and company include:

1. Customization

We offer customized screw jacks to meet the specific needs of our customers.

2. Quality

Our screw jacks are made from high-quality materials and are designed to withstand heavy loads and harsh environmental conditions.

3. Performance

Our screw jacks offer precise control and smooth movement, making them ideal for applications that require accurate positioning.

4. Service

We provide excellent customer service and technical support to ensure that our customers get the best possible experience.

5. Competitive Pricing

We offer competitive pricing for our products and strive to provide the best value for our customers.

screw jack

In summary, a screw jack is a versatile mechanical actuator used for lifting heavy loads or applying force. Choosing the right screw jack involves considering factors such as load capacity, lifting height, speed, and duty cycle. At HZPT, we offer high-quality screw jacks that are designed to meet the specific needs of our customers. Contact us today to learn more about our products and services.


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.