Telescopic Hydraulic Cylinders

Hyco Alabama specializes in the design and manufacture of both Single Acting and Double Acting Telescopic Hydraulic Cylinders. We build both standard catalog telescopic designs as well as custom application engineered telescopic cylinders.

Often a hydraulic cylinder is required to fit into a very tight space and yet provide a stroke that is actually longer than its fully retracted length. A standard rod cylinder can not do this.

A telescopic cylinder, however, can achieve a very long stroke from a compact retracted length. Telescopic cylinders use a series of nested tubular segments sliding within one another (see diagram below). This enables them to provide a very long output stroke from a very short retracted length in one combined actuator. These cylinders are available in 2, 3, 4, 5, or even 6 stages.

Most telescoping cylinders are single acting. That means that they extend using hydraulic pressure but then retract using gravity and the mass of the load. A typical example is that of a telescopic cylinder on a dump truck.

Double acting telescopic cylinders are much more complicated. They incorporate internal return pistons, additional seals, and complex internal  fluid passageways to enable the cylinder to retract using hydraulic power. Double acting telescopic cylinders are often used in horizontal applications where gravity is not available to retract the cylinder. Applications include waste compaction and push off cylinders.

The maximum available force output of any telescopic cylinder is limited to the effective area of its smallest stage. 

Because of their long length when fully extended (see illustration above),  telescopic cylinders must be very carefully designed. A poorly designed telescopic actuator will wear out quickly in the field and cause a machine failure. It may even buckle and collapse causing a dangerous catastrophic failure of the machinery. The result to the end user would be  machine downtime, lost production, very expensive repairs, and perhaps even loss of  lives.

Above: The Hyco Series 70 Telescopic Cylinders are built tough. Click on the image to take a closer look at the heavy duty features.

At Hyco Alabama, we have decades of experience designing and building telescoping actuators. In addition to our standard catalog range of telescopic cylinders, we have built custom designed models with bores as large as 20" (500 mm). This experience gives our customers peace of mind knowing that their actuators have been designed and built by people that truly know what they are doing.  We are committed to quality and reliability.

NOTE: Hyco strongly recommends that our customers discuss all aspects of their telescopic hydraulic cylinder requirement  with our engineering group  so as to ensure a successful machine application. Click here to download our Telescopic Cylinder Application Form in Excel format.

Hyco Alabama manufactures standard catalog design and custom designed telescopic hydraulic cylinders. Click here to download a copy of our Standard Telescopic Cylinder Catalog.

At Hyco Alabama, we produce standard and custom telescopic cylinders for the following applications including:

• aerial boom cylinders
• boom cylinders
• cranes
• compaction cylinders
• custom telescopic cylinders
• custom telescoping cylinders
• double acting telescopic cylinders
• double acting telescoping cylinders
• dump bodies
• dump trailers
• dump trucks
• excavators
• forklift mast cylinders
• inverted telescopic cylinders
• inverted telescoping cylinders
• hydraulic cranes
• hydraulic excavators
• large bore telescopic cylinders
• large bore telescoping cylinders
• lift cylinders
• lift truck hydraulic cylinders
• long stroke telescopic cylinders
• long stroke telescoping cylinders
• multi stage telescopic cylinders
• multi stage telescoping cylinders
• mast raising cylinders
• mobile cranes
• mobile rigs
• oil drilling rigs
• oil well cylinders
• oil rig cylinders
• oil field cylinders
• pivot mount telescopic
  
• push off cylinders
• reach stackers
• refuse trucks
• roll off trucks
• single acting telescopic cylinders
• single acting telescoping cylinders
• telehandlers
• telehandler cylinders
  

• telescopic boom cylinders
• telescoping boom cylinders
  
• telescopic crane cylinders
  
• telescopic excavators
• telescopic handlers
• telescopic lift cylinders
• telescopic masts
• telescopic shovels
• telescoping boom cylinders
• telescoping crane cylinders
  
• telescoping excavators
• telescoping handlers
• telescoping lift cylinders
• telescoping masts
• telescoping shovels
• tilt cylinders
• trunnion mount telescopic
  
• very large bore telescopic cylinders
• very large bore telescoping cylinders
• very long stroke telescopic cylinders
• very long stroke telescoping cylinders
• 2 stage telescopic
• 3 stage telescopic
• 4 stage telescopic
• 5 stage telescopic
• 6 stage telescopic
• 7 ton telescopic cylinders
• 12 ton telescopic cylinders
• 20 ton telescopic cylinders
• 30 ton telescopic cylinders
• 40 ton telescopic cylinders
• 50 ton telescopic cylinders
• 7 ton telescoping cylinders
• 12 ton telescoping cylinders
• 20 ton telescoping cylinders
• 30 ton telescoping cylinders
• 40 ton telescoping cylinders
• 50 ton telescoping cylinders