A hydraulic jack achieves lifting with minimal force using Pascal's principle. Its core lies in the uniform pressure transmission within a closed hydraulic system. When the handle is operated, the pressure applied by the small hydraulic cylinder (approximately 10-20mm in diameter) is transmitted through hydraulic oil to the large cylinder (50-100mm in diameter), generating a lifting force amplified dozens of times (e.g., a 10N input force can output a 500N lifting force).
A screw jack, on the other hand, uses a precision thread structure (2-5mm pitch, 10°-15° lead angle). When the screw is rotated, the rotational motion is converted into vertical displacement through the threaded joint. A single stroke can reach 100-300mm, with a mechanical efficiency of 60%-80%. Both types are widely used in automotive repair (3-20 ton lifting requirements), bridge construction (100-500 ton lifting), and other scenarios.
The hydraulic type is suitable for short-stroke, high-load applications, while the screw type is better suited for precise positioning. Produces screw jacks with chromium-molybdenum alloy screws (hardness HRC58-62) and self-locking thread design, with a safety factor of more than 3 times. It offers multiple specifications from 5 to 50 tons, suitable for various industrial scenarios. Technicians can recommend suitable models for specific working conditions.
