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Screw Jacks for Linear Motion Applications

A screw jack is an adjustable support that operates by turning a leadscrew. This type of jack is commonly used to raise moderate to heavy weights. It is also used on aircraft to raise their horizontal stabilizers. It is also commonly used as an adjustable support for heavy loads. The screw jack is a popular choice for a wide range of applications.

Thomson screw jacks are ruggedly designed and can lift up to 100 tons. They come in a variety of motorized configurations and are designed to meet customer specifications. These USA-made screw jacks are suited for industrial and military applications. They can be customized to fit specific applications, including lifting platforms and metallurgical operations.

The ActionJac(tm) Worm Gear Screw Jacks have a specified temperature range, but they can be designed for higher operating temperatures. When operating at high temperatures, make sure to de-rate the jacks accordingly. Then, choose an appropriate brake size for the dynamic load. If your requirements are more stringent, you can opt for an externally cooled recirculating lubrication system.

Screw jacks come in three main types: Travelling Screw Type, Travelling Wedge Screw Type, and Travelling Nut Type. The free load type causes the screw to rotate around its axis while fixed load connections cause the gearbox to receive movement. The wedged screw type has a movable bronze flange.

Unlike worm gear jacks, bevel gear screw jacks use trapezoidal or acme screws and bevel gears inside the housing. They are more efficient than worm gear jacks and can reach speeds up to 60% faster. Additionally, they are ideal for fast lowering and lifting.

Screw jacks have many applications and are popular for lifting industrial loads. Once you understand how they work, incorporating them into mechanized applications becomes a breeze. Typical applications for a screw jack are in the production of transmission products, gearboxes, and more. A screw jack can handle five to 2000kN of load.

Screw jacks are used in linear motion applications and are used to lift, tilt, and roll loads. They are also used in tight clearances. For example, they can be used to move a large dish antenna. Conveyor lifts and drive wheel adjustments can also be easily performed with a screw jack.

A ball screw jack has a ball screw that actuates the lead screw. This type of screw jack uses less friction and is more efficient than a machine screw jack. Ball screw jacks are also more durable and require lower horsepower motors. However, the drawbacks of a ball screw jack are that it is more costly to operate.


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