screw jack floor support

Screw Jack Floor Support – The Ultimate Guide for Engineers

screw jack

Are you looking for a reliable and efficient way to support floors or other heavy structures? Then you should consider using a screw jack floor support. Screw jacks are simple and versatile devices that can lift and support heavy loads with ease. In this comprehensive guide, we will explain everything you need to know about screw jacks, including their applications, working principles, differences from other types of jacks, and how to select or customize the right screw jack for your specific needs.

What is a Screw Jack and What is it Used For?

screw jack

A screw jack is a type of mechanical device that uses a screw thread to convert rotary motion into linear motion. It consists of a threaded shaft, a nut, and a handle or motor. When the handle or motor turns the shaft, the nut moves up or down the thread, causing the load attached to the nut to move as well.

Screw jacks are widely used in many industries, including construction, automotive, aerospace, and manufacturing. They are ideal for lifting heavy loads, supporting structures, adjusting heights, and applying pressure or tension. Some of the common applications of screw jacks include:

  • Supporting floors, platforms, and bridges
  • Adjusting the height of equipment, machinery, and vehicles
  • Applying pressure or tension in testing and calibration
  • Lifting and lowering stages, curtains, and screens
  • Controlling the position and movement of solar panels, antennas, and telescopes

What is the Working Principle of Screw Jack?

screw jack

The working principle of screw jack is based on the fundamental concept of screw thread. A screw thread is a helical ridge on the surface of a shaft or a nut that allows the shaft and nut to rotate relative to each other while moving linearly. When a rotary force is applied to the shaft, it rotates and moves the nut along the thread, causing the load attached to the nut to be lifted or lowered.

The mechanical advantage of a screw jack is determined by the pitch of the thread, the diameter of the shaft, and the friction between the nut and the shaft. The higher the pitch and the smaller the diameter, the greater the mechanical advantage. The greater the friction, the more force is required to turn the shaft, but the more stable the load will be.

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

Although screw jacks and hydraulic jacks are both used for lifting and supporting heavy loads, they have some significant differences in terms of working principles, load capacity, speed, and maintenance.

  • Working principle: Screw jacks use a screw thread to convert rotary motion into linear motion, while hydraulic jacks use pressurized fluids to generate force.
  • Load capacity: Screw jacks typically have lower load capacities than hydraulic jacks, but they are more precise and controllable.
  • Speed: Screw jacks are slower than hydraulic jacks in lifting and lowering loads, but they are more stable and reliable.
  • Maintenance: Screw jacks require less maintenance than hydraulic jacks, as they have fewer moving parts and do not require fluid changes or leaks repairs.

How to Choose or Customize the Right Screw Jack for Your Needs?

screw jack

Choosing or customizing the right screw jack for your specific needs requires careful consideration of several key parameters, such as:

  • Load capacity: The maximum weight that the screw jack can lift and support.
  • Lifting height: The distance that the load needs to be lifted or lowered.
  • Screw diameter: The size of the screw thread that determines the mechanical advantage and the load capacity.
  • Drive mechanism: The type of motor or handle that is used to turn the screw shaft.
  • Mounting options: The ways in which the screw jack can be attached to the load and the ground.
  • Environment: The conditions in which the screw jack will be used, such as temperature, humidity, and vibration.

At HZPT, we offer a wide range of high-quality screw jacks that can be customized to meet your specific requirements. Our screw jacks have several advantages over other types of jacks, such as:

  • High precision: Our screw jacks can lift and support loads with high accuracy and repeatability.
  • High reliability: Our screw jacks are designed to operate efficiently and effectively in harsh and demanding environments.
  • Easy installation: Our screw jacks can be easily mounted to various types of structures and equipment.
  • Low maintenance: Our screw jacks require minimal maintenance and can last for many years without major repairs.
  • Competitive pricing: Our screw jacks are priced competitively without sacrificing quality or performance.

If you are looking for a reliable and cost-effective way to support your heavy structures, contact us today to learn more about our screw jacks and how they can benefit your business.


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Ep Screw Jack Co., Ltd.

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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.