A telescopic cylinder, also known as a multistage cylinder or a telescoping cylinder, is a type of hydraulic cylinder that consists of multiple nested stages or sections that can extend and retract. Each stage of the cylinder fits inside the previous stage, allowing for a compact retracted length and an extended length that is several times longer than the retracted length. Telescopic cylinders are commonly used in applications where a long stroke is required in a limited space.

Here are some key features and characteristics of telescopic cylinders:

Multiple Stages: Telescopic cylinders consist of two or more stages, with each stage sliding inside the previous stage. The stages are typically arranged in a telescoping manner, where the smallest stage is the innermost and the largest stage is the outermost.

Long Stroke Length: Telescopic cylinders are designed to provide a long stroke length relative to their retracted length. The stroke length is determined by the number and length of the stages. The extended length of a telescopic cylinder can be several times its retracted length, allowing for a significant range of motion.

Compact Design: Telescopic cylinders offer a compact design compared to other types of cylinders with similar stroke lengths. The nested stages allow for a smaller retracted length, making them suitable for applications where space is limited.

High Force Output: Telescopic cylinders can generate high force output, similar to other types of hydraulic cylinders. The force output is determined by factors such as the cylinder's bore size, hydraulic pressure, and the effective area of the piston.

Sequential Movement: The stages of a telescopic cylinder extend and retract in a sequential manner. This sequential movement enables incremental extension and retraction, allowing for precise control over the position and speed of the load.

Applications: Telescopic cylinders are commonly used in various industries and applications. They are often employed in dump trucks, cranes, material handling equipment, mobile equipment, and any application where a long stroke is required in a confined space.

When selecting a telescopic cylinder, it is important to consider factors such as the required stroke length, force output, retracted length, mounting options, and compatibility with the hydraulic system. It is recommended to consult with a hydraulic system engineer or a cylinder manufacturer to ensure the appropriate telescopic cylinder is chosen for your specific application needs.