hand screw jack

Hand Screw Jack: Working Principle and Applications

screw jack

A hand screw jack is a mechanical device used for lifting heavy loads. It is a simple machine that converts rotational motion into linear motion. The screw jack has a long history and has been used in various applications, from lifting a car to supporting a bridge. In this article, we will explore the working principle and applications of the hand screw jack.

What is a screw jack used for?

screw jack

A screw jack is used for lifting heavy loads vertically or horizontally. It is commonly used in the automotive industry for lifting cars and other vehicles. It is also used in construction for supporting structures such as bridges and buildings. Screw jacks are used in manufacturing for adjusting and positioning heavy machinery. They are also used in the entertainment industry for creating special effects, such as lifting and moving scenery on stage. Here are some specific applications:

  • Automotive: Lifting and adjusting cars, trailers, and other vehicles for maintenance and repair.
  • Construction: Supporting structures for maintenance, repair, and installation.
  • Manufacturing: Adjusting and positioning heavy machinery.
  • Entertainment: Creating special effects, such as lifting and moving scenery on stage.

What is the working principle of screw jack?

screw jack

The working principle of a screw jack is based on the principle of a simple machine, the screw. The screw jack consists of a screw, a nut, and a handle. The screw is turned by the handle, which causes the nut to move linearly along the screw. The nut is usually attached to a platform or load, which is lifted or lowered as a result of the linear motion. The screw jack can lift heavy loads because of the mechanical advantage provided by the screw thread.

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 method of power transmission. A screw jack uses mechanical power to lift heavy loads, while a hydraulic jack uses hydraulic power. A hydraulic jack consists of a hydraulic cylinder, a piston, and a pump. The pump delivers hydraulic fluid to the cylinder, which causes the piston to move. The piston is connected to a platform or load, which is lifted or lowered as a result of the piston movement. Hydraulic jacks are usually more powerful than screw jacks, but they are also more expensive and require more maintenance.

How to choose or customize the right screw jack?

screw jack

Choosing or customizing the right screw jack depends on several factors, including the load capacity, lifting height, operating speed, and environmental conditions. Here are some key parameters to consider:

  • Load capacity: The maximum weight that can be lifted by the screw jack.
  • Lifting height: The maximum height that the screw jack can lift the load.
  • Operating speed: The speed at which the screw jack raises or lowers the load.
  • Environmental conditions: The temperature, humidity, and other factors that may affect the operation of the screw jack.

About HZPT

As a leading manufacturer of industrial motors, gearboxes, and drives, HZPT is committed to innovation and quality. Our products include micro gear motors, medium-sized gear motors, brake-adjustable speed motors, torque motors, DC motors, NMRV worm gear motors, bevel gear cone gear motors, WPRV worm gear reducers, rigid face helical gear reducers, helical gear worm gear reducers, parallel shaft helical gear reducers, helical bevel gear reducers, worm gear spiral lifts, rigid face gear reducers, planetary gear reducers, and other transmission products. Our products are 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, making us the first choice for automation equipment.

Why choose HZPT screw jacks?

Here are some reasons why you should choose HZPT screw jacks:

  • High load capacity: Our screw jacks can lift loads up to 100 tons.
  • High lifting height: Our screw jacks can lift loads up to 12 meters.
  • Smooth operation: Our screw jacks operate smoothly and quietly.
  • Customization: We can customize our screw jacks to meet your specific requirements.
  • Quality guarantee: We offer a one-year warranty for all our products.

With our commitment to quality and innovation, HZPT screw jacks are the perfect choice for your lifting needs. Contact us today to learn more about our products and services.


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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.