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Differences Between Various Screw Jacks

Differences Between Various Screw Jacks

2025-10-27

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Ordinary screw jacks rely on the self-locking action of the threads to support heavy objects. While simple in construction, they suffer from low transmission efficiency and slow return travel. Self-lowering screw jacks, on the other hand, lack self-locking threads and are equipped with a brake. Releasing the brake allows the load to quickly and automatically lower, shortening the return travel time. However, this type of jack is more complex in construction. Screw jacks can support heavy objects for extended periods, with a maximum lifting capacity of 100 tons, making them widely used. A horizontal screw installed at the bottom allows for small lateral movements of the load.
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