Worm Jack
A worm jack, also known as a screw jack, is a mechanical device used to lift heavy loads that are difficult or impossible to lift manually. It consists of a worm screw and a lifting mechanism that is driven by a hand crank or an electric motor. The worm screw rotates and moves a load-bearing nut, which in turn moves the lifting mechanism up or down.

What is a screw jack used for?
- Machine lifting and leveling.
- Heavy-duty industrial applications.
- Bridge construction and repair.
- Automotive and aerospace engineering.
- Steel mills and mining operations.
- Construction and excavation work.
- Warehouse and material handling operations.
- Marine and offshore applications.
- Renewable energy and power generation.
- Civil engineering and infrastructure projects.
- Medical and scientific research.
- Entertainment and stage production.
- And many other applications where heavy loads need to be lifted or moved.

What is the working principle of screw jack?
The working principle of a screw jack is based on the worm screw and nut mechanism. As the worm screw rotates, it moves the nut up or down depending on the direction of rotation. The nut is attached to the lifting mechanism, which in turn moves up or down depending on the direction of rotation of the worm screw. The lifting speed and load capacity of the screw jack depend on the pitch of the worm screw, the number of threads on the screw, and the efficiency of the worm gear pair.
- Screw jacks have a simple design and are easy to maintain.
- They have a high load capacity and can lift heavy loads safely and efficiently.
- They have a wide range of lifting speeds and can be used for both slow and fast lifting operations.
- They have a long service life and can withstand harsh environmental conditions.
- They are cost-effective and can be customized to meet specific lifting requirements.

What is the difference between a screw jack and a hydraulic jack?
The main difference between a screw jack and a hydraulic jack is the type of mechanism used to lift heavy loads. A screw jack uses a worm screw and nut mechanism, while a hydraulic jack uses pressurized fluid to lift heavy loads. Screw jacks are generally slower and less powerful than hydraulic jacks, but they are more precise, have a higher load capacity, and are easier to maintain. Hydraulic jacks are faster and more powerful, but they require more maintenance and are more expensive to operate.
How to choose or customize a suitable screw jack?
Choosing or customizing a suitable screw jack involves considering several factors, including:
- Load capacity: The load capacity of the screw jack should be sufficient to lift the desired load safely and efficiently.
- Lifting height: The lifting height of the screw jack should be sufficient to meet the lifting requirements.
- Lifting speed: The lifting speed of the screw jack should be compatible with the lifting requirements.
- Environmental conditions: The screw jack should be able to withstand the environmental conditions, including temperature, humidity, and corrosive agents.
- Mounting options: The screw jack should have suitable mounting options to fit the application requirements.
- Power source: The screw jack can be powered by a hand crank or an electric motor, depending on the application requirements.
- Customization: The screw jack can be customized to meet specific lifting requirements, including load capacity, lifting height, lifting speed, and mounting options.

HZPT: Your Trusted Screw Jack Manufacturer
As a leading manufacturer of industrial motors, gearboxes, and drive systems, HZPT is committed to providing high-quality and reliable screw jacks for various applications. Our screw jacks are designed and manufactured to meet the most demanding lifting requirements, with a wide range of load capacities, lifting heights, and lifting speeds.
- Customization: We can customize our screw jacks to meet your specific lifting requirements, including load capacity, lifting height, lifting speed, and mounting options.
- High load capacity: Our screw jacks have a high load capacity, ranging from 1 ton to 100 tons.
- High lifting height: Our screw jacks can lift loads up to 12 meters high, depending on the model.
- High lifting speed: Our screw jacks can lift loads at a speed of up to 3000mm/min, depending on the model.
- High precision: Our screw jacks have a high precision, with a positioning accuracy of up to 0.01mm.
- Easy maintenance: Our screw jacks have a simple design and are easy to maintain, with low maintenance costs.
- Wide range of applications: Our screw jacks are widely used in various industries, including automotive, aerospace, construction, mining, and renewable energy.
- Competitive pricing: Our screw jacks are priced competitively, with a high cost-performance ratio.
Contact us today to learn more about our screw jack products and services, and let us help you find the best solution for your lifting needs.