screw jack northern tool

screw jack northern tool


A screw jack is a versatile lifting device commonly used in various industrial applications. It consists of a threaded shaft, also known as a screw, and a rotating handle or motor that converts rotational motion into linear motion. In this article, we will explore the applications, working principle, differences from hydraulic jacks, and how to choose and customize the right screw jack for your specific needs.

screw jack

What is a screw jack used for?

1. Lifting heavy loads: Screw jacks are commonly used for lifting heavy loads in industries such as construction, automotive, and manufacturing. They provide a stable and reliable lifting mechanism.

2. Positioning and leveling: Screw jacks are used for precise positioning and leveling of equipment and machinery. They offer fine adjustment capabilities, ensuring accuracy in various applications.

3. Load holding and support: Screw jacks can be used to hold and support loads in a fixed position, providing stability and preventing unwanted movement.

4. Height adjustment: Screw jacks are often used for height adjustment in stages, platforms, and other structures where vertical positioning is required.

5. Mechanical presses: Screw jacks can be used in mechanical presses for applying controlled pressure and force during pressing operations.

screw jack

What is the working principle of screw jack?

The working principle of a screw jack is based on the mechanical advantage gained from the rotation of the threaded screw. When the handle or motor is turned, the screw moves linearly, causing the load to move up or down depending on the direction of rotation. This linear motion is achieved through the interaction of the screw threads with a nut or worm gear mechanism.

The mechanical advantage of a screw jack is determined by the pitch of the screw threads. A lower pitch provides a higher mechanical advantage, allowing the jack to lift heavier loads with less effort.

screw jack

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

1. Operation: Screw jacks are manually operated or motor-driven, requiring physical effort to rotate the handle or power from a motor. Hydraulic jacks, on the other hand, use hydraulic pressure to lift loads, usually operated by a pump or compressed air.

2. Load capacity: Screw jacks are typically designed for heavy-duty lifting applications and can handle higher load capacities compared to hydraulic jacks.

3. Speed: Hydraulic jacks offer faster lifting and lowering speeds compared to screw jacks, making them more suitable for applications that require quick and efficient operations.

4. Precision: Screw jacks provide precise positioning and fine adjustment capabilities, making them ideal for applications that require accurate load positioning. Hydraulic jacks may have less precision in terms of positioning.

5. Maintenance: Screw jacks are generally easier to maintain compared to hydraulic jacks, as they have fewer components and do not rely on hydraulic fluids.

How to choose or customize the right screw jack?

When selecting or customizing a screw jack, several parameters and practical considerations need to be taken into account:

1. Load capacity: Determine the maximum load the screw jack needs to lift or support. Consider safety factors and potential load variations.

2. Travel distance: Determine the required travel distance or stroke length of the screw jack to ensure it meets the application’s specific requirements.

3. Speed and efficiency: Consider the desired lifting or lowering speed and the efficiency required for the application. This will help determine the appropriate gear ratio or motor specifications.

4. Mounting options: Assess the available space and mounting requirements to choose the right mounting configuration for the screw jack.

5. Environmental factors: Consider factors such as temperature, humidity, and exposure to chemicals or other corrosive substances to select suitable materials and coatings for the screw jack.

screw jack

About HZPT

As a leading manufacturer of industrial motors, gearboxes, and drive components in China, HZPT is committed to technological innovation and excellent product quality. Our extensive range of products includes miniature gear motors, medium-sized gear motors, brake speed motors, torque motors, DC motors, NMRV worm gear motors, bevel gear motors, WPRV worm gear reducers, rigid tooth face bevel gear reducers, helical worm gear reducers, parallel shaft helical gear reducers, spiral bevel gear reducers, worm screw lifts, rigid tooth face gear reducers, and planetary gear reducers.

Our products find wide applications in various industrial production lines, such as transportation machinery, food machinery, medical machinery, printing machinery, textile machinery, packaging machinery, office equipment, instrumentation, and more. They are the preferred choice for automation equipment.

Our company’s advantages include:

1. Technological innovation: We continuously invest in research and development to ensure our products are at the forefront of technological advancements in the industry.

2. Excellent product quality: We adhere to strict quality control standards, ensuring that all our products meet or exceed international quality and performance requirements.

3. Customization capabilities: We offer customized solutions to meet specific customer requirements, including specialized designs, materials, and coatings.

4. Reliable performance: Our products are designed for durability, reliability, and long service life, even in demanding industrial environments.

5. Strong customer support: We provide comprehensive customer support services, including technical assistance, product selection guidance, and after-sales support to ensure customer satisfaction.

Choose HZPT for your screw jack needs and experience the superior quality and performance of our products. Contact us today to discuss your requirements and start a fruitful partnership.


Find us

Ep Screw Jack Co., Ltd.

Mail: [email protected]

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.