These cylinders consist of a succession of aluminum or steel tubes of progressively smaller diameters set within one another, which allows for significant extension. The collapsed length of the cylinder is usually 20% to 40% of the completely extended length. Of course, this depends on how many stages are included in the design. Read More…
Leading Manufacturers
Cylinders & Valves, Inc.
Strongsville, OH | 440-238-7343Our company name is not a misnomer-we have been manufacturing cylinders and valves since 1958. We manufacture air and hydraulic cylinders plus their associated valves and replacement parts.
Buffalo Hydraulic
Buffalo, NY | 716-893-6510For over 60 years, our company has offered hydraulic solutions to complex high pressure problems. We distribute products such as hydraulic cylinders, hydraulic presses, hydraulic pumps, hydraulic valves (both direction and solenoid), control valves, flow valves and more.
Metro Hydraulic Jack Co.
Newark, NJ | 800-633-8234We take pride in saying that we are a family owned business. Our company has over 70 years of manufacturing experience. We will provide all of your needs and you can count on us to get the job done correctly.
Phelps Industries, Inc.
Little Rock, AR | 501-375-1141Phelps Industries specializes in hydraulic cylinders, heavy duty hydraulic cylinders, high pressure hydraulic cylinders, telescopic hydraulic cylinders and hydraulic cylinder repair.
Southern Hydraulic Cylinder, Inc.
Athens, TN | 800-737-8988Southern Hydraulic Cylinder manufactures custom welded and telescopic hydraulic cylinders. We maintain inventory on 5" bore and smaller single-acting telescopic cylinders and build-to-order all welded hydraulic cylinders with bores up to 10".
Telescopic Hydraulic Cylinders - Cylinders & Valves, Inc.Though telescopic hydraulic cylinders may be custom designed for optimum extension and other features, the maximum number of stages is usually restricted to six. The largest, outermost sleeve is referred to as the barrel or the main while the inner sleeves are called the stages, and the smallest is often referred to as the plunger or piston rod.
Telescopic hydraulic cylinders are used in a variety of applications, including construction equipment like dump trucks, large capacity marine cranes, and oil field drilling rigs. In these demanding settings, the cylinders are usually used to raise and lower pieces of equipment as with the dumping action of the dump truck or to erect the mast of a mobile drilling rig. Generally, the cylinders are anchored in machinery by pivot mounts welded to the body of the barrel as well as the end of the piston rod, and can tolerate hydraulic pressure at a maximum of 2000-3000 psi.
No matter the application, it is very important that telescopic hydraulic cylinders be used in a way that avoids side loads from pushing on the actuator as this can cause excessive wear and sometimes very serious damage. At full extension, they are even more susceptible to side forces. Telescopic hydraulic cylinders should always be viewed as force generating devices, never as stabilizing devices.
There are many manufacturers of telescopic hydraulic cylinders to choose from and many offer custom design options to suit specific applications. Double acting cylinders as well as single acting cylinders are also an option when it comes to these cylinders. Double acting cylinders are extended and retracted by use hydraulic pressure in both directions. Some even use a combination of both single and double acting technology, where the piston is double acting and the rest of the stages are single acting.
Telescopic cylinders are often used in and considered in regards to heavy machinery, but there are smaller bore designs used in lighter applications as well. There are a range of specific designs, features, and capabilities that can be considered and employed when it comes to telescopic hydraulic cylinders.