Double Section Screw Jack

  • Author John Doe
  • Date May 16
  • Categories no_categories

The double-section screw structure consists of two screws and two nuts. The diameter of the first-stage screw is larger than that of the second-stage screw. There is a keyway on the first-stage screw, and the inner hole of the worm gear is a through hole with a keyway. When the worm gear rotates counterclockwise, the key structure drives the first-stage screw to rotate. A nut with an internal thread is installed above the turbine and fixed on the top of the box. It cooperates with the thread of the first-stage screw. The screw and the nut produce relative movement, and the screw rises or falls. The second-stage structure is also a combination of a pair of nuts and screws. The secondary nut is connected to the primary screw and rotates and rises and falls with the primary screw. The secondary screw is connected to the user’s equipment. The screw does not rotate, but only rises and falls.

  1. The primary and secondary screws have the same axis;
  2. Compact structure, small size, saving space and cost;
  3. Reduce the weight of the overall platform, reduce the output power of the drive source, energy saving and environmental protection;
  4. Double the speed. Compared with a single-section screw, the speed is twice that of a single-section screw at the same input speed;


What's the difference between Worm Gear Screw Jack and Bevel Gear Screw Jack?

  • Author John Doe
  • Date May 16
  • Categories no_categories

1. Gear Mechanism

  • Worm Gear Screw Jack: Uses a worm gear mechanism, where a worm (screw) engages with a worm wheel (gear) to transmit motion. The worm gear reduces speed while increasing torque.

  • Bevel Gear Screw Jack: Uses bevel gears, which are conical gears designed to transmit motion between intersecting shafts, typically at a 90-degree angle.

2. Speed and Efficiency

  • Worm Gear Screw Jack: Generally slower but provides higher torque and self-locking capability.

  • Bevel Gear Screw Jack: Offers higher efficiency and faster speed but may require a brake system to prevent back-driving.

3. Load Handling Capacity

  • Worm Gear Screw Jack: Suitable for heavier loads due to its high torque output.

  • Bevel Gear Screw Jack: More suited for applications where high-speed movement and moderate load handling are required.

4. Self-Locking Feature

  • Worm Gear Screw Jack: Typically self-locking, meaning it can hold a load in position without additional braking.

  • Bevel Gear Screw Jack: Not usually self-locking, so an external brake or locking mechanism may be needed.

5. Efficiency & Power Consumption

  • Worm Gear Screw Jack: Less efficient due to friction in the worm gear system, leading to higher power consumption.

  • Bevel Gear Screw Jack: More efficient with lower power consumption due to better mechanical advantage.

6. Application Suitability

  • Worm Gear Screw Jack: Used in applications requiring high force, stability, and safety, such as lifting platforms, heavy machinery, and presses.

  • Bevel Gear Screw Jack: Ideal for applications needing high-speed movement with moderate force, such as automation systems, conveyor adjustments, and stage lifting.


You can choose the appropriate lift according to your working conditions.You can choose the appropriate lifter according to your working conditions. If it is slow, low frequency and self-locking, the worm gear screw lifter is suitable. If it is fast and high frequency, then the bevel gear lifter is suitable.