Screw Jack

Screw Jack produced by Hebei baiyi hoisting machinery manufacturing co., ltd is a classic lifting tool with a sturdy structure, strong load-bearing capacity, and reliable self-locking.Compared with hydraulic jacks, it does not require hydraulic oil, is easy to maintain, and can reliably support heavy objects in any position for a long time.Widely used in equipment installation, mechanical maintenance, bridge engineering, construction engineering, and industrial production scenarios such as lifting, pressing, and leveling.

Screw jack features:

Strong self-locking ability: The spiral pair has a natural self-locking function, and the load can be stably maintained at any height after stopping the operation, without the need for additional braking devices, ensuring high safety.

Large bearing capacity: The structure is sturdy and typically has a bearing range of 1 ton to over 100 tons.

High reliability, simple maintenance: pure mechanical structure, not affected by temperature, no risk of oil leakage, long service life.

Accurate control: The lifting height can be precisely controlled (usually with a fixed thread lead, such as rotating one turn to increase one pitch), suitable for situations that require fine leveling.

Flexible working position: can be used vertically, horizontally, or upside down.

Screw jack classification:

Classified by driving mode:

1 Manual screw jack: driven by manually rotating by inserting the handle.

2 Electric screw jack: driven by a motor, with fast lifting speed and labor-saving, suitable for frequent or automated operations.

Classified by structure:

1 Fixed base type: The most common type is when the base is fixed

2 Mobile (with pulleys): The base is equipped with wheels for easy movement.

How to choose right screw jack?

Determine the rated load capacity (tonnage): The rated load of the selected jack should be at least 20% -30% greater than the actual maximum load. Do not overload for use.

Determine the required stroke (lifting height): Ensure that the maximum stroke of the jack can meet the working requirements, while considering whether its lowest height can fit into the bottom of the heavy object.

Determine the working frequency and environment:

Frequent or prolonged work, consider electric type.

Outdoor, with large temperature differences or requiring long-term support, spiral type (non hydraulic) is preferred.

Narrow space, choose thin or low release type.

Precautions for use (safety first)

Pre use inspection: Check the screws and nuts for cracks, severe wear, or deformation to ensure flexible rotation without jamming.

Stable foundation: placed on a solid and flat ground, and if necessary, use pads to increase the pressure bearing area。

Center placement: Ensure that the center of gravity of the heavy object acts on the center area of the jack tray to prevent uneven loading。

Overloading and overtraveling are strictly prohibited: these are the main causes of accidents.

Strictly prohibit the operation of extension rods: Extending the handle will greatly increase the torque, which may cause the screw to overload and break.

Descending operation: When descending, the handle should be slowly and uniformly reversed to control the heavy object to descend smoothly.

After sell services:One-year warranty period also can supply replace parts.