The Ultimate Guide to Screw Jacks: Stability and Durability in Heavy Lifting
Veröffentlichungsdatum:
2026-05-25
Screw jack, also known as mechanical jack, is a lifting tool that converts rotary motion into linear motion through screw and nut transmission. Its main components include screw rod, nut, base, handle and safety cap. The screw rod is made of high‑strength steel with precise thread processing, ensuring smooth transmission and strong bearing capacity. The base is designed with a large contact area to reduce pressure and improve stability.
The working principle is to rotate the handle to drive the screw rod to rise or fall, thus realizing load lifting or lowering. The self‑locking property of the screw thread can keep the load stable at any height without slipping, which enhances operation safety.
In terms of application, screw jacks are suitable for heavy load lifting with low height, such as machinery installation and alignment, vehicle chassis maintenance, bridge support and reinforcement, and building component adjustment. They are also used in shipbuilding for hull positioning and in mining for equipment maintenance.
With advantages like simple operation, reliable self‑locking, strong durability and no need for power supply, screw jacks remain essential tools in heavy industry, construction and transportation sectors.
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