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electric worm gear screw jacks
Motorized Electric Screw Jack Actuators Price

Electric screw jack actuators  is a basis jack-up part, accomplish the functions such as lifting, drop, push and inverting through worm gear drives screw.

electric worm gear screw jack lift
Two-set Linkage Screw Jack System

Two-set linkage screw jack system can be "L", I and T configuration.  It usually consists bevel gearbox, screw jack, electric motor, gear reducer, hand wheel, pillow block bearing, jaw coupling, line shafting.

 Automatic Screw Jack Lift System
Good Performance Screw Jack Lift System

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 System Features: 1. Heavy duty, self-locking, positioning precision, uniform lifting speed, fully synchronization, easy installation, easy operation 2. Two screw jacks system, three screw jacks system..forty screw jacks system. 3. Extremely high capacity requirements of need very precise up or down control. It's of high mechanical, they are an excellent choice when hydraulic, pneumatic or chain systems are prohibitive choices. 4. Widely used in wood working machines, plastics processing machines, textile machines, assembly equipment in the automobile and aircraft industries, food and beverage production equipment as well as packaging machines.

acme ball screw jacks screw lift
Four-set Linkage Screw Jacks System

Four-set linkage screw jack system can be  I and T configuration, transmission efficiency can be 85% .

worm screw jack lift table
High Efficiency Worm Gear Screw Jack Systems

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.

SE enclosed housing slewing drive
Slewing Drive for Aerial platform

Slewing drives are powered with hourglass worm technology for maximum gear torque and the smoothest rotation.

Worm Gear Slewing Drive
Slewing Drive WE Series

WE Series Slewing drive is combined by the curved tooth slewing ring and worm, gear and worms are more touch supply larger torque.

spiral bevel gear unit
HD Series Spiral Bevel Gearbox

HD Series spiral bevel gearbox is hexahedron,which can fit different direction mounting.

worm gear ball and acme screw jacks
Worm Gear Screw Jack with reducer and motor

Screw jack is used in applications where linear motion is required. Lifting of any load, pushing or pulling of mechanical equipment, adjusting of tight clearances of mechanical parts can be done by screw jacks.

Spiral Gear screw jack
High-speed Lifting Bevel Gear Screw Jack

High-speed lifting bevel gear screw jacks are partly completed machines and intended for installation in complete machines or to be used for assembly with a totality of machinery to create systems.The bevel gear transmission makes high lifting speeds and a high duty cycle possible.

acme mechanical screw jacks lifts
Trapezoidal Machine Screw Jacks 5Ton

Worm Gear Machine Screws Jacks are common worm gear screw jacks,can be upright or inverted,with anti-rotation or self-locking functions.

high efficiency electric lift cylinder
Energy Saving Electric Linear Actuator with DC Motor

An Electric Linear Actuator is an actuator that creates motion in a straight line, in contrast to the circular motion of a conventional electric motor.

right angle bevel gearboxes
T Series Bevel Spiral Gearbox

T series bevel gearbox is standardized with many varieties. The deceleration ratio is 1:1, 1.5:1, 2:1, 2.5:1 and 3:1, which are all actual transmission ratios.

Acme Screw Linear Actuator
ACME Screw Linear Actuator with AC Motor

A Electric Linear Actuator is a mechanical device that converts energy (power from air, electricity or liquid) to create motion in a straight line.

ball screw electric cylinder
Ball screw lifting electric linear actuator

An electric linear actuator is a device that converts the rotational motion of a motor into linear motion – that is push and pull movements.

Screw Jack Knowledge
Basic Knowledge about Screw Jack
  • September 5,2017.

Definition of screw jack

A screw jack is a metal support post that operates by turning a leadscrew and has all its components (rotating shaft, output linear motion shaft or a screw and support bearings) integrated in a housing. Screw jacks are used for lifting, levelling or positioning heavy equipment or for supporting structures and are being operational with the help of a screw or hydraulic cylinder and piston. They can be powered mechanically, electrically, manually, pneumatically etc.


Types of screw jack
Most screw jacks fall into three categories:
  • Ball screw jacks - which use recirculating ball bearings on a precision pitch screw for lifting. These types of screw jacks are needed especially when long duty cycle or high efficiency applications;
  • Machine screw jacks - which use screws with less pitch and usually do not have ball bearings. They are less efficient than ball screw jacks, but have a higher resistance at back driving and vibration;
  • Roller screw jacks - are a derivation from ball screw jacks, therefore they have high efficiency, but use threaded rollers instead of balls. Overall, they are used in applications that require strict load capacity, speed, axial stiffness, acceleration or deceleration.

machine and ball screw jack

There are also a variety of other screw jacks used in linear motion systems, such as:
  • Bell-bottom screw jacks - operate by the same principle as a threaded nut and screw, which makes them extremely helpful when it comes to lifting high loads (up to 24 tons in large models);
  • Ratchet jacks - were widely used in mines, shipyards or railroads; these jacks are built to hold round lever bars and usually designed for general use;
  • Hydraulic jacks - are compact and suitable for working in tight places;
  • Post jacks - are suitable for light-duty applications and consist of two metal pipes sleeved one into another and topped with a manual screw.


Advantages of using screw jack

  • self-locking (when the rotational force on the screw is removed, the position will remain the same as it was left before it stopped rotating,,this is machine screw jack's featue);
  • safe;
  • they create strong bonding and are resistant when it comes to losing the material they connect with;
  • resistant to rust;
  • specifically designed to be used on wood, sheet metal, concrete, drywall etc.


Lude Transmission is specialized in kinds of worm gear screw lifts/screw jacks,if you are interested,just feel free to contact us.We will try to provide suitable jacks with best price!


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