25 Ton Manual Screw Jack

The ATO 25-ton mechanical screw jack is designed for lifting and lowering heavy loads with ease. Operated manually, it offers precise control and stability, making it suitable for positioning heavy equipment, adjusting platforms, and providing reliable support for large structures.

Specifications

• Model: T-HT8432-25T
• Capacity (Load): 25 ton
• Jack Length: 275mm
• Total Length: 505mm
• Minimum Altitude: 275mm
• Lifting Height: 130mm
• Weight: 9.71kg

Features

• Integrated body structure ensures high stability during lifting.
• The red line indicates the maximum jacking height; exceeding this height is prohibited.
• Multi-layer primer baking, resistant to paint peeling, corrosion, and rust.
• Lightweight design, easy to transport and operate.
• Not suitable for automotive use or long-term support.
• The thread should be kept clean and lubricated for smooth operation.
• Overloading is strictly prohibited to ensure safety.

Details

1. The cast iron top cover: Quenched for durability and reliability.
2. The jacking sleeve: 45# stainless manganese steel is used to achieve durability.
3. The integrated cast iron: Forged for a high safety coefficient.
4. The handle: A handle of humanized design, which is easy to carry.
5. The ratchet wheel: Being engaged securely, it is not easy to fall off.
6. The base: The base, which has a larger thickness, ensures stable operation.
7. The control handle: The pinion in the rocker bar moves freely and stably, which provides ease in operation.

Use Methods

3.2T-25T:

For small-tonnage jacks, when lifting, the control cylinder needs to be lifted and rotated 180°, and when lowering, the cylinder should be lifted and rotated back to its original position.

32T-200T:

For large-tonnage jacks, when lifting, simply press the control cylinder to the other end. When descending, simply return the cylinder to its original position to complete the descent.

Tips for Using a Screw Jack

• Before lifting a heavy object, ensure the jack is placed upright to avoid screw bending and potential accidents.

• When operating, shake the handle with a steady, even force to prevent impact damage and ensure safe use.

• Do not exceed the jack’s rated load capacity, as overloading can easily cause accidents.

• The lifting height must stay within the marked line on the sleeve or piston; if unmarked, it should not exceed three-quarters of the total screw or piston height to prevent parts from coming loose and damaging the jack.

• Before lowering the load, confirm that it is securely supported, then release the jack slowly to guarantee safety.

• Apply grease for lubrication during storage to reduce wear and extend the jack’s service life.

Applications

Mechanical screw jacks are widely used in heavy load lifting scenarios, especially where precise positioning is required. This 20 ton jack is suitable for building support and foundation work, bridge construction and reinforcement, railway construction and maintenance, as well as material handling in manufacturing and workshops.

Tips: How does the screw thread provide a mechanical advantage in a screw jack?

The screw thread in a screw jack creates a mechanical advantage by working on the same principle as an inclined plane. The thread is a continuous spiral wrapped around the screw shaft, and when the screw is turned, the nut holding the load travels up or down along this spiral path.

The spacing between two successive threads is known as the pitch. With each full rotation of the screw, the nut shifts by the length of the pitch. For instance, if the pitch is 1 mm, one complete turn moves the nut 1 mm, while a half turn moves it only 0.5 mm. This means rotational motion is converted into very precise linear movement.

Because the pitch acts like a ramp, the force applied to rotate the screw is multiplied into a much larger lifting force on the load. In this way, a screw jack can raise heavy objects with comparatively little manual effort, making it highly efficient and reliable for lifting tasks.