double lifting screw jack

Double Lifting Screw Jack: An In-Depth Guide

screw jack


Double lifting screw jacks are innovative mechanical devices widely used in various industries for lifting heavy loads and providing precise positioning. These jacks consist of two lifting screws connected to a common gearbox, offering enhanced stability and load distribution. In this comprehensive guide, we will delve into the intricacies of double lifting screw jacks, exploring their applications, working principles, key differences from hydraulic jacks, and factors to consider when choosing or customizing the ideal screw jack for your specific requirements.

What is a Screw Jack Used For?

1. Load Lifting and Positioning: Double lifting screw jacks excel in lifting and positioning heavy loads in a controlled manner. They find extensive use in industries such as transportation, food processing, medical equipment, printing, textile machinery, packaging, and office equipment.

2. Height Adjustment: Screw jacks allow for precise adjustment of working heights, making them invaluable in industrial production lines.

3. Mechanical Presses: These jacks can be used in mechanical presses to apply force for various forming and shaping processes.

4. Load Balancing: Screw jacks help distribute the weight of heavy loads evenly, ensuring stability and reducing stress on supporting structures.

5. Automation Systems: Screw jacks are integral components in automated systems, providing controlled motion for assembly lines, robotics, and other applications.

screw jack

What is the Working Principle of Screw Jack?

The working principle of a screw jack is based on the conversion of rotary motion into linear motion. When the input rotary motion is applied to the drive shaft, it rotates the lifting screws through the gearbox. The rotating motion of the lifting screws generates axial movement, lifting or lowering the load. The pitch of the screw determines the linear displacement for each revolution, allowing precise positioning.

The self-locking feature of screw jacks enables them to hold the load in position without additional power, providing reliable load support and improving safety.

With the use of a worm gear mechanism, screw jacks offer high gear ratios, resulting in significant mechanical advantage and the ability to handle heavy loads with ease.

screw jack

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

1. Power Source: Screw jacks rely on mechanical input, typically through a hand crank or electric motor, while hydraulic jacks utilize hydraulic fluid pressure for operation.

2. Precision Control: Screw jacks provide precise and controllable linear motion, making them suitable for applications requiring accurate positioning. Hydraulic jacks offer greater force capability but may lack the same level of precision.

3. Maintenance: Screw jacks generally require less maintenance compared to hydraulic jacks, as they have fewer moving parts and do not rely on hydraulic fluid.

4. Load Holding: Screw jacks have a self-locking feature, allowing them to hold loads without power. Hydraulic jacks require continuous hydraulic pressure to keep loads in position.

5. Environmental Impact: Hydraulic jacks may pose environmental risks due to potential hydraulic fluid leakage. Screw jacks do not have this concern, making them more environmentally friendly.

Choosing or Customizing the Right Screw Jack

When selecting or customizing a screw jack for your specific application, consider the following parameters and factors:

1. Load Capacity: Determine the maximum load the screw jack needs to handle, taking into account both static and dynamic loads.

2. Travel Speed: Consider the required travel speed for lifting or lowering the load. Higher gear ratios provide slower movement for precision positioning.

3. Operating Environment: Evaluate the environmental conditions, such as temperature, humidity, and exposure to dust or corrosive substances, to choose appropriate materials and coatings.

4. Mounting Options: Assess the available space and mounting requirements to ensure proper integration of the screw jack into the system.

5. Safety Features: Look for additional safety features like limit switches, overload protection, and emergency stop mechanisms to enhance operational safety.

screw jack

Introducing HZPT – Your Leading Screw Jack Manufacturer

As a leading manufacturer in China specializing in industrial electric motors, gear reducers, and drives, HZPT is committed to driving technological innovation and delivering excellent quality. Our extensive product range includes:

1. Micro Gear Motors

2. Medium Gear Motors

3. Brake Speed Control Motors

4. Torque Motors

5. DC Motors

6. NMRV Worm Gear Motors

7. Bevel Gear Motors

8. WPRV Worm Gear Reducers

9. Rigid Face Gear Reducers

10. Helical Worm Gear Reducers

11. Parallel Shaft Helical Gear Reducers

12. Spiral Bevel Gear Reducers

13. Worm Spiral Lifts

14. Rigid Face Gear Reducers

15. Planetary Gear Reducers

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

Why choose HZPT?

1. Exceptional Quality: Our products are manufactured with precision and adhere to the highest quality standards, ensuring reliable performance and longevity.

2. Customization: We offer customization options to tailor our products to your specific requirements, ensuring optimal performance and efficiency.

3. Advanced Technology: HZPT embraces cutting-edge technologies to develop innovative products that meet the evolving needs of the industry.

4. Extensive Experience: With years of experience in the industry, we have gained in-depth knowledge and expertise, making us a trusted partner.

5. Superior Customer Support: We provide excellent customer support, assisting you throughout the selection, purchase, and after-sales process to ensure your satisfaction.

Partner with HZPT today for top-quality screw jacks and experience the difference in performance and reliability. Contact us now to discuss your requirements!


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.