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A standard mechanical jack, also known as an SJ, is a tool used to lift heavy objects such as vehicles, machinery, and other heavy loads. It works on the principle of a screw thread, where a long screw or lead screw is rotated to raise or lower the load.
The SJ consists of a base, usually made of cast iron or steel, with a hole in the center to accommodate the screw. The screw has a handle on one end and a lifting plate on the other. The lifting plate is positioned under the load to be lifted, and the handle is turned to raise the load.
A standard mechanical jack, also known as an SJ jack, typically has the following characteristics:
Lift capacity: SJs come in a range of lift capacities, from 1 ton to 20 tons or more, and are used for lifting heavy loads such as cars and trucks.
Manual operation: SJs are operated manually using a handle that is turned to raise or lower the jack.
Adjustable height: The height of the SJ can be adjusted to suit the application, usually by twisting a knob or lever to lock the jack in place.
Portable: SJs are generally compact and easy to transport, making them ideal for use in a variety of locations.
Heavy-duty construction: SJs are typically made from high-quality materials such as steel, and are designed to withstand heavy loads and frequent use.
Safety features: SJs often come equipped with safety features such as overload protection and a locking mechanism to prevent accidental lowering.
Versatility: SJs can be used for a variety of applications, including lifting cars and trucks, supporting heavy machinery, and leveling structures.
Overall, SJs are a reliable and versatile tool that is essential in many industries and applications.
