aircraft jack screw

What is an Aircraft Jack Screw?


An aircraft jack screw, also known as a screw jack, is a mechanical device used to lift heavy loads in the aviation industry. It plays a crucial role in various aircraft maintenance and repair operations by providing reliable and precise lifting capabilities.

screw jack

Main Components of an Aircraft Jack Screw

Aircraft jack screws consist of several key components that work together to provide efficient lifting mechanisms:

1. Screw Shaft

The screw shaft is a threaded rod that translates rotational motion into linear motion. It is designed with high precision to ensure smooth and accurate lifting operations.

2. Nut

The nut is a component that engages with the screw shaft’s threads. As the screw shaft rotates, the nut moves up or down, depending on the direction of rotation, allowing for vertical lifting or lowering of the load.

3. Worm Gear

The worm gear is responsible for transmitting rotational motion from the input shaft to the screw shaft. It provides mechanical advantage and helps in achieving higher lifting capacities with less effort.

4. Motor or Hand Crank

An aircraft jack screw can be powered by an electric motor or operated manually using a hand crank. The motorized version offers faster and more convenient lifting capabilities, while the manual option provides flexibility in situations where power sources are limited.

5. Safety Mechanisms

Aircraft jack screws are equipped with various safety mechanisms to prevent accidents and ensure the stability of the lifted load. These mechanisms include limit switches, emergency stop buttons, and overload protection features.

What is a Screw Jack Used For?

screw jack

A screw jack has a wide range of applications, including:

– Aircraft Maintenance

Screw jacks are extensively used in aircraft maintenance and repair operations for tasks such as raising landing gears, adjusting control surfaces, and supporting heavy components during inspections or replacements.

– Industrial Equipment

In industrial settings, screw jacks are employed to lift and position heavy machinery, adjust conveyor heights, and provide stability for various assembly processes.

– Automotive Industry

In the automotive industry, screw jacks are utilized for lifting vehicles during repairs, tire changes, and other maintenance tasks.

– Construction

Screw jacks find applications in construction projects for raising and stabilizing structures, such as bridges or temporary supports.

– Entertainment Industry

In the entertainment industry, screw jacks are used to lift and control stage platforms, lighting fixtures, and other equipment during performances or events.

Working Principle of Screw Jack

screw jack

The working principle of a screw jack involves the conversion of rotational motion to linear motion. Here’s how it works:

1. Input Rotation

When the input shaft or motor rotates, it drives the worm gear, which, in turn, rotates the screw shaft.

2. Thread Engagement

As the screw shaft rotates, the nut, which is in contact with the threads on the shaft, moves along the screw shaft. The direction of the nut’s movement depends on the direction of rotation.

3. Linear Motion

The movement of the nut along the screw shaft results in linear motion. This linear motion allows the screw jack to lift or lower heavy loads with precision.

Difference Between a Screw Jack and a Hydraulic Jack

While both screw jacks and hydraulic jacks serve the purpose of lifting heavy loads, they differ in terms of operation and specific applications:

– Operating Mechanism

Screw jacks use a mechanical screw and nut system to achieve lifting, whereas hydraulic jacks rely on the principles of fluid pressure to provide lifting force.

– Load Capacity

Hydraulic jacks generally have higher load capacities compared to screw jacks, making them suitable for heavier lifting operations.

– Speed of Operation

Screw jacks are slower in operation compared to hydraulic jacks, which can lift loads more quickly.

– Maintenance and Control

Hydraulic jacks require regular maintenance, including fluid checks and seal replacements, while screw jacks are relatively low-maintenance and offer precise control over lifting operations.

Choosing and Customizing the Right Screw Jack

screw jack

When selecting or customizing a screw jack for your specific requirements, several parameters and factors need to be considered:

– Load Capacity

Determine the maximum weight or load that the screw jack needs to lift to ensure it can handle the desired workload.

– Lifting Speed

Consider the required lifting speed, as different screw jacks have varying operating speeds. Choose a jack that aligns with your project’s time constraints.

– Travel Distance

Evaluate the vertical travel distance required for your application to ensure the screw jack provides adequate lifting height.

– Environmental Conditions

Consider the operating environment, including temperature, humidity, and exposure to dust or corrosive substances. Opt for screw jacks with suitable coatings or materials that can withstand these conditions.

– Mounting Options

Determine the most appropriate mounting method for your application, whether it’s vertical, horizontal, or any other specific orientation.

– Safety Features

Ensure the screw jack includes necessary safety features such as limit switches, emergency stop buttons, and overload protection to prevent accidents and protect the load.

About HZPT Industrial Products

As a leading manufacturer of industrial motors, gearboxes, and drive systems in China, HZPT is committed to technological innovation and delivering excellent quality products. Our extensive product range includes:

  • Micro Gear Motors
  • Medium Gear Motors
  • Brake Speed Motors
  • Torque Motors
  • DC Motors
  • NMRV Worm Gear Motors
  • Bevel Gear Motors
  • WPRV Worm Gearboxes
  • Rigid Tooth Face Bevel Gear Reducers
  • Helical Worm Gear Reducers
  • Parallel Shaft Helical Gear Reducers
  • Spiral Bevel Gear Reducers
  • Worm Screw Lifts
  • Rigid Tooth Face Gear Reducers
  • Planetary Gear Reducers

Our transmission products are widely used in various industries, including transportation machinery, food machinery, medical machinery, printing machinery, textile machinery, packaging machinery, office equipment, instruments, and more. As a preferred choice for automation equipment, we strive to provide high-quality solutions that meet specific customer requirements.

Why Choose HZPT Screw Jacks?

Here are five reasons why you should consider our screw jacks:

1. Exceptional Load Capacity

Our screw jacks can handle heavy loads with ease, ensuring reliable and safe lifting operations.

2. Precise and Smooth Movement

With high precision and efficient design, our screw jacks offer smooth and accurate linear motion control.

3. Durability and Longevity

Manufactured using high-quality materials and advanced manufacturing processes, our screw jacks are built to last and withstand demanding industrial environments.

4. Customization Options

We provide customization services to tailor our screw jacks to your specific requirements, ensuring optimal performance and compatibility with your application.

5. Comprehensive Safety Features

Our screw jacks are equipped with essential safety mechanisms, including limit switches and overload protection, to guarantee operator safety and protect the load being lifted.

Contact us today to explore our range of screw jacks and discuss how our products can meet your lifting and positioning needs. Partner with HZPT Industrial Products for reliable and efficient solutions.


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.