screw jack

screw jack


A screw jack, also known as a worm gear jack, is a mechanical device used to lift heavy loads vertically or horizontally. It consists of a threaded screw mechanism and a load-bearing platform.

1. History and Development

The screw jack has a long history dating back to ancient times. It has evolved over the centuries, with advancements in materials and design, to become a reliable and efficient lifting solution in various industries today.

2. Types of Screw Jacks

There are different types of screw jacks available, each with its own specific application and design. These include:

  • Machine Screw Jack: Designed for precise positioning and lifting smaller loads.
  • Ball Screw Jack: Utilizes a ball screw mechanism for increased efficiency and load capacity.
  • Stainless Steel Screw Jack: Resistant to corrosion and suitable for use in harsh environments.
  • Electric Screw Jack: Powered by an electric motor for automated lifting operations.
  • Manual Screw Jack: Operated manually using a hand crank or lever.

screw jack

3. What is a screw jack used for?

A screw jack finds applications in various industries for lifting, leveling, pushing, pulling, and positioning heavy loads. Some common uses include:

  • Industrial Machinery: Used to adjust the height and position of components in manufacturing processes.
  • Construction: Supports structures during the construction or maintenance phase.
  • Warehousing: Enables efficient stacking and organization of goods.
  • Transportation: Assists in loading and unloading heavy cargo.
  • Automotive: Facilitates lifting vehicles for maintenance or repair work.

screw jack

4. Working Principle of Screw Jack

The working principle of a screw jack involves the conversion of rotary motion into linear motion. When the input force is applied to the screw, it moves linearly, causing the load to be lifted or lowered. The helical threads on the screw and the mating nut provide the mechanical advantage required for lifting heavy loads.

screw jack

5. Difference between a Screw Jack and a Hydraulic Jack

While both screw jacks and hydraulic jacks are used for lifting heavy loads, they differ in their operating mechanisms and applications. The main differences are:

  • Operating Mechanism: Screw jacks use a threaded screw mechanism, while hydraulic jacks rely on hydraulic fluid for lifting.
  • Load Capacity: Hydraulic jacks generally have a higher load capacity compared to screw jacks.
  • Precision: Screw jacks offer greater precision and control in positioning and lifting operations.
  • Maintenance: Screw jacks require less maintenance and are more resistant to leaks compared to hydraulic jacks.
  • Application: Screw jacks are commonly used in industries such as manufacturing, construction, and transportation, while hydraulic jacks are often found in automotive and heavy machinery applications.

Choosing and Customizing the Right Screw Jack

When selecting or customizing a screw jack, it is important to consider the following parameters and practical conditions:

  • Load Capacity: Determine the maximum weight the screw jack needs to lift.
  • Travel Distance: Calculate the required vertical or horizontal travel distance.
  • Lifting Speed: Determine the desired speed of the lifting operation.
  • Environment: Consider factors such as temperature, humidity, and exposure to corrosive substances.
  • Mounting Options: Choose the appropriate mounting method, such as flange or base mounting.

screw jack

HZPT – Your Leading Manufacturer of Screw Jacks

As a leading manufacturer of industrial motors, gearboxes, and drive solutions, HZPT is committed to delivering innovative technology and exceptional quality. Our range of products includes:

  • Micro Gear Motors
  • Medium Gear Motors
  • Brake Speed Controllers
  • Torque Motors
  • DC Motors
  • NMRV Worm Gear Motors
  • Spiral Bevel Gear Motors
  • WPRV Worm Gear Reducers
  • Rigid Tooth Surface Spiral Bevel Gear Reducers
  • Spiral Bevel Gear Worm Gear Reducers
  • Parallel Shaft Spiral Bevel Gear Reducers
  • Screw Lifts
  • Rigid Tooth Surface Gear Reducers
  • 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. HZPT is the preferred choice for automation equipment.

Why choose HZPT for your screw jack requirements?

  • Reliable Quality: Our screw jacks are manufactured using high-quality materials and undergo rigorous quality control checks.
  • Customization Options: We offer a wide range of customization options to meet specific application requirements.
  • Technical Expertise: Our team of engineers and technicians are experienced in providing technical support and solutions.
  • Competitive Pricing: We strive to offer competitive prices without compromising on quality.
  • Customer Satisfaction: We prioritize customer satisfaction and strive to exceed expectations in every aspect of our service.

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.