Screw Jacks Suppliers


A Screw Jack (also called a Jack Screw, Worm Screw Jack, Machine Screw Jack, or Lead Screw Jack) is a device that converts rotational motion into linear motion. It takes advantage of a screw thread’s mechanical advantage, allowing it to be used to magnify force.


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Types of Screw Jack

When considering the performance/cost ratio, XL’s lifting screw jack or multiple jack system is always the best solution to lift, lower, push or pull a load. We have four main types of screw jacks: worm gear machine screw jacks, ball screw jacks, bevel gear jacks, and stainless steel jacks.

To determine which type of screw jack is best for your application, you must consider several factors, including load, self-locking capabilities, stroke, speed, efficiency, accuracy, duty cycle, and price.

Ball Screw Jacks

  • Improved speed, efficiency, duty cycle
  • Requires less motor power
  • Better positioning accuracy
  • Not suitable for manual operation
  • Need brake motor to hold the position
  • Load capacities: 1 ton to 100 ton
  • Input shafts: 1 or 2

Machine Screw Jacks

  • Slower travel speeds
  • Lower Efficiency
  • Lower duty cycles
  • Usually self-locking
  • Good choice for small load manual operation
  • Load capacities: 1 ton to 120 ton
  • Input shafts: 1 or 2

Bevel Gear Screw Jacks

  • It has acme screw or ball screw version
  • Fast travel speeds
  • High efficiency
  • High duty cycles
  • No suitable for heavy load
  • Load capacities: 1 ton to 25 ton
  • Input shafts: 1, 2 or 3

Advantages of using Screw Jack

1. Transfer torque into linear power for loading, lowering, pushing, and dragging applications.
2. The use of mechanical advantage reduces the amount of energy required to move large loads.
3. Loads are held in place without the need for braking systems in self-locking devices.
4. Compared to other linear motion technologies, this technology has the best cost/performance ratio.

Your Premier Screw Jack Manufacturer

XL is a China-based manufacturer offering a complete line of screw jacks and lifting accessories, including ball screw jacks, machine screw jacks, worm gear screw jacks, bevel gear machine jacks, bevel gear ball screws, bevel gearboxes, and even customize the screw jack and gearbox for your specific need.

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In House Staffs

The trapezoidal screw jacks ( also named acme screw jacks or self-locking Screw Jacks )are widely used for metal sheet cutting machines. The most commonly used jacks are vertical screw jacks with a top plate and clevis end.


– Trapezoidal Screw Jack

Screw jack lift system structures include miter gearboxes, screw jacks, electric motor or gear reducer, hand wheel,pillow block bearings, jaw couplings and line shaftings.


– Screw Jack Lift System

A safety nut on a screw jack is an auxiliary nut, which follows the “lifting nut” on a rotating screw jack or the worm gear on a translating screw jack.


– Mechanical Screw Jack With Safety Nut

Manual operated screw jack is ideal solutions for applications where electricity or power generators is inconvenient or dangerous, light weight, low duty cycle, low target cost and short travel length .


– Manual Operated Screw Jack

Featured Products for Sale

Bevel Gear Screw Jacks

Bevel gear screw jacks use grinding-grade spiral bevel gear for high-speed and high-duty circle application. Bevel gear screw jacks are more efficient and faster than worm-driven screw jacks, so it’s the best choice for many applications.

Ball Screw Jacks

The ball screw jacks can be employed for lifting, pulling, moving, and aligning any load with perfect synchronism, which is difficult to obtain by other handling devices. The ball screw jacks are suitable for high services and very rapid, quick, and precise positioning.

SWL Series Worm Screw Jack

SWL screw Jack is an essential lifting device; it can achieve the functions of lifting, lowering, pushing, and turning through a worm gear drive screw. The worm screw lift features a compact structure, small size, lightweight, low noise, flexible use, and long service life.

Stainless Steel Screw Jacks

Stainless steel screw jacks use stainless steel or bronze material for all exposed surfaces and components; it’s ideal for use in corrosive, wet environments and chemical or food industries. Three jack configurations: translating, rotating, and keyed.Can customize it to your specification.

Bevel Gear Ball Screw Jack

Bevel gear ball screw jacks achieve fast travel speeds and are rated for near-continuous operation. Bevel gear high-speed screw jacks are precision screw jacks that use spiral bevel gear sets. High-quality alloy steel is used in their manufacture, and they are case-hardened.

JTW Series Machine Screw Jacks

JTW series machine screw jack is used to apply a force, push and pull, lift and lower, open and close, or move to a position and hold by mechanically converting rotary motion into linear motion. Due to the classic design, you don’t need to attach any construction elements to the housing.

Worm Gear Screw Jack Video

Screw Jack Knowledge

What should pay attention when using screw jacks ?

The specific precautions for the screw jack are as follows:

Firstly, always keep the surface of the screw jack clean, regularly check whether the internal structure is intact, make the pinion in the rocker flexible and reliable, and lift the lifting sleeve freely.

Secondly, the friction surface between the lifting sleeve and the housing must be oiled at any time. Other oil filling holes should be lubricated regularly.

Thirdly, in order to take into account the safety in use, the jack should not be overloaded, work with illness, it is not appropriate to use more than one to avoid danger.

Fourthly, The screw jack must be checked regularly, depending on the level of use and the working environment. It is advisable to check if there is a lubricant leak in the housing. If this happens, you need to find and remove the cause and fill the lubricant with the correct level.The lubrication conditions of the threaded spindle must be checked regularly (if necessary, recovery must be made) and the presence of any foreign matter. Safety components must be inspected according to applicable specifications.

How do rotate screw jack and translating screw jack work?

According to movement type, the worm gear screw jack can be classified as translating screw jack or a rotating screw jack. Then how do these two types of screw jacks work? Let’s see the followings.

—Translating screw jack

The rotation of the worm shaft causes the worm gear to rotate. For translating screw jacks, the worm gear is threaded to accommodate the lead screw thread. As the worm gear turns, the friction forces on the screw thread also act to turn the screw. The greater the load on the screw jack unit, the greater the tendency of the screw to turn. If the screw turns with the nut (worm gear), it will not raise the load. In those cases where a single unit is used, and the bag cannot be restrained from turning, it is necessary to use a screw jack with an anti-rotation mechanism (anti-rotation keyed screw jack). Lead screw key torque must be checked as hefty unguided loads could break the anti-rotation tool.

—Rotating Screw Jack

The rotation of the worm shaft causes the worm gear to rotate. For rotating screw jacks, the lead screw is fixed to the worm gear and rotates at the same speed. As the worm gear turns, the friction forces on the screw thread also act to turn the nut. The greater the load on the screw jack unit, the greater the tendency of the nut to turn. If the nut turns with the screw, it will not raise the load. Therefore the nut needs to be fixed to a structure to prevent rotation.

When choosing translating screw jacks, the available screw top end can be a top plate, threaded end, plain end, clevis end, or fork end. But for rotating screw jack, the available screw top end can only be straight and threaded.

Rugged and Reliable Screw Jacks!

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