screw jack types

screw jack types


In this blog post, we will explore the various types of screw jacks and their applications in different industries. Screw jacks are mechanical devices that convert rotational motion into linear motion. They are commonly used in engineering and manufacturing fields for lifting heavy loads and providing precise positioning.

1. Mechanical Screw Jacks

Mechanical screw jacks are the most basic type of screw jacks. They consist of a screw mechanism, a gear system, and a handle. These jacks are manually operated and commonly used in applications where the load does not require frequent adjustments.

2. Worm Gear Screw Jacks

Worm gear screw jacks are designed for heavy-duty applications. They utilize a worm gear mechanism to provide high load capacity and precise positioning. These jacks are self-locking, meaning they can hold the load in position without the need for additional locking mechanisms.

3. Ball Screw Jacks

Ball screw jacks incorporate a ball screw mechanism, which offers high efficiency and low backlash. These jacks are suitable for applications that require fast and precise positioning. They are commonly used in automation systems, CNC machinery, and robotics.

4. Stainless Steel Screw Jacks

Stainless steel screw jacks are corrosion-resistant and ideal for applications in harsh environments. They are commonly used in the food processing industry, chemical plants, and marine applications. These jacks ensure reliable performance and long service life even in corrosive conditions.

5. Electric Screw Jacks

Electric screw jacks are powered by electric motors and offer precise and efficient positioning. They are commonly used in applications that require frequent adjustments or automation. Electric screw jacks can be easily integrated into control systems, allowing for remote operation and precise load control.

screw jack

What is a screw jack used for?

A screw jack is a versatile lifting and positioning device used in various industries. Here are some of its common applications:

– Industrial machinery: Screw jacks are used for adjusting and leveling heavy machinery and equipment.

– Construction: They are used for lifting and supporting structures during construction or maintenance.

– Automotive: Screw jacks are used for lifting vehicles in garages and car repair shops.

– Aerospace: They are used for positioning components during assembly or maintenance of aircraft.

– Entertainment industry: Screw jacks are used in stage setups to lift and move heavy props or equipment.

screw jack

What is the working principle of screw jack?

The working principle of a screw jack is based on the principles of a screw and a nut. When the handle or motor rotates the screw, the nut moves linearly along the screw. This linear motion allows the screw jack to lift or lower the load. The pitch of the screw determines the amount of linear motion per revolution.

The mechanical advantage of a screw jack is determined by the thread pitch and the diameter of the screw. The larger the thread pitch or the smaller the screw diameter, the higher the mechanical advantage and the greater the load capacity.

screw jack

What is the difference between a screw jack and a hydraulic jack?

While both screw jacks and hydraulic jacks are used for lifting loads, they function differently:

– Screw jacks use mechanical motion and a screw mechanism to lift the load, whereas hydraulic jacks use hydraulic fluid and a piston to generate lifting force.

– Screw jacks offer precise positioning and are suitable for applications that require stability and control, while hydraulic jacks provide greater lifting capacity but may sacrifice some precision.

– Screw jacks can hold the load in position without additional locking mechanisms, while hydraulic jacks require hydraulic pressure to keep the load lifted.

How to choose or customize the right screw jack?

Choosing or customizing the right screw jack involves considering various parameters and practical conditions. Here are some factors to consider:

– Load capacity: Determine the maximum load the screw jack needs to lift or support.

– Travel length: Determine the required linear travel length for the application.

– Speed requirements: Consider the desired lifting or lowering speed.

– Environmental conditions: Evaluate the presence of corrosive substances, high or low temperatures, or other environmental factors.

– Mounting and integration: Determine the suitable mounting options and integration with existing systems.

screw jack

As a leading manufacturer of industrial motors, gearboxes, and drive components in China, HZPT adheres to the philosophy of “leading technological innovation and achieving excellent quality.” Our main products include micro gear motors, medium-sized gear motors, brake variable speed motors, torque motors, DC motors, NMRV worm gear motors, bevel gear cone gear motors, WPRV series worm gear reducers, rigid tooth surface helical gear reducers, helical gear worm gear reducers, parallel shaft helical gear reducers, spiral bevel gear reducers, worm screw lifts, rigid tooth surface gear reducers, and planetary gear reducers. These transmission products are widely used in various industrial production lines, including transportation machinery, food machinery, medical machinery, printing machinery, textile machinery, packaging machinery, office equipment, and instrumentation, making them the preferred supporting products for automation equipment.

Why choose our screw jack products?

1. High load capacity: Our screw jacks are designed to handle heavy loads and provide reliable lifting performance.

2. Precise positioning: With their precise screw mechanisms, our jacks ensure accurate and repeatable positioning.

3. Corrosion resistance: Our stainless steel screw jacks are resistant to corrosion, making them suitable for demanding environments.

4. Customization options: We offer a wide range of options and accessories to tailor the screw jacks to specific application requirements.

5. Quality assurance: Our screw jacks undergo strict quality control measures to ensure their durability and performance.


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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.