Basics of Telescopic Cylinders

Telescopic Cylinders are found in dump trucks, lifts and garbage trucks etc. where power is needed to handle very heavy loads. These are some of the most common applications for telescopic cylinders. 

Now, what are telescopic cylinders?

Telescopic cylinders are a type of linear actuator consisting of a series of tubular rods called sleeves. The sleeves (usually four or five) sequentially decrease in diameter and are nested inside each other. They are also called multi-stage cylinders.

What is their working principle?

Once hydraulic pressure is introduced to the cylinder, the largest sleeve (called the main or barrel) is extended first. Once the barrel has reached its maximum stroke, the next sleeve usually referred to as a stage, begins to extend. This process continues until the cylinder reaches its last stage, called the plunger.

Types of Telescopic Cylinders?

There are two different types of telescopic hydraulic cylinders:

1. Single-acting cylinders-  Single-acting, by far the most common, work by using gravity or some other external force to retract the stages of the cylinder. As soon as pressure is released from the cylinder, the force of the load pushes oil out of the system and the cylinder retracts.

2. Double-acting cylinders – They are not very common because of the complex design and working principle. A double-acting cylinder is extended and retracted using hydraulic or pneumatic pressure in both directions.

Force is generated through pneumatic power or hydraulic power. Out of the two hydraulic power is much more common, especially when heavy loads are being moved. Telescopic hydraulic cylinders are used when extension needs to be originated from a tight space.

Hydraulic & Pneumatic Products is a well-known hydraulic press manufacturer in India famous for offering an extensive range of best quality telescopic cylinders equipped with modern technology.