Hydraulic cylinder 260 bar series-production range
The hydraulic cylinder 260 bar series-production range from Liebherr offers cost-effective cylinder solutions for demanding operating conditions. The 28 basic rated diameter variants for the piston and piston rod combination can be configured with different types of mounting, oil connections and piston rod coatings. It thus provides the necessary flexibility for applications in which no extensive additional requirements, e.g. for sensors, are placed on the cylinder.
Product range at a glance
|Stroke lengths||up to 3,100 mm, greater lengths upon request|
|Piston diameter||90 - 230 mm|
|Piston rod diameter||50 - 150 mm|
Scope of application
The 260 bar series of hydraulic cylinders are very robust against static and dynamic loads. This makes the cylinders suitable for a wide range of mobile and stationary applications. Construction machines are also among the target applications, such as mobile work platforms, presses and various other industrial machines.
Hydraulic cylinder design
The hydraulic cylinders are calculated and built according to current state-of-the-art procedures. For example, the finite element method supports the design of the builds. Supportive pulse and endurance tests are also carried out to check the calculations. The corresponding 3D models can thus also be provided for each cylinder variant.
Four types of attachment and two alternative oil connections are available for each piston rod and piston combination. Depending on the environmental conditions, single-chrome or double-chrome coating is used for the piston rod. Functional extensions such as sensor or cushioning solutions were deliberately avoided during the design in order to be able to realize the most economical solution for the respective target application.
The standard coating is a high-quality single chromium layer with a thickness of 25 μm (± 5 μm). For higher corrosion or impact protection requirements, a hardened piston rod with double chrome coating is available. This coating ensures a minimum of 96 hours in the acetic acid salt spray test (AASS) according to DIN EN ISO 9227 rating 10.
Seals are very important for the reliability of hydraulic cylinders. With a compact sealing arrangement and an innovative sealing system, Liebherr also meets the highest of demands with this series. Only high quality, low-friction gaskets are used by default. The rod seal also uses a proven tandem sealing system consisting of primary and secondary seals.
To be compatible with the wide variety of hydraulic cylinder installation situations, the 260 bar series has four possible types of mounting: Swivel eye on the bottom side (MP3), joint eye on the bottom side (MP5), round flange on the head side (MF3) and pivot pin mounting (MT4). A thread is used for connection to the piston rod and optionally a suitable joint head can also be pre-assembled.
Depending on the customer's requirements, the oil connection can be made in the 260 bar series of hydraulic cylinders using an inch-sized or a metric threaded connection.