Hydraulic Cylinders

Hydraulic cylinders are actuation devices that utilize pressurized hydraulic fluid to produce linear motion and force.  Hydraulic cylinders are used in a variety of power transfer applications.  Operating specifications, configuration or mounting, materials of construction, and features are all important parameters to consider when searching for hydraulic cylinders.

Important operating specifications for hydraulic cylinders include the cylinder type, stroke, maximum operating pressure, bore diameter, and rod diameter.  Choices for cylinder type include tie-rod, welded, and ram.  A tie-rod cylinder is a hydraulic cylinder that uses one or more tie-rods to provide additional stability.  Tie-rods are typically installed on the outside diameter of the cylinder housing.  In many applications, the cylinder tie-rod bears the majority of the applied load.  A welded cylinder is a smooth hydraulic cylinder that uses a heavy-duty welded cylinder housing to provide stability.  A ram cylinder is a type of hydraulic cylinder that acts as a ram.  A hydraulic ram is a device in which the cross-sectional area of the piston rod is more than one-half the cross-sectional area of the moving component.  Hydraulic rams are primarily used to push rather than pull, and are most commonly used in high pressure applications.  Stroke is the distance that the piston travels through the cylinder. Hydraulic cylinders can have a variety of stroke lengths, from fractions of an inch to many feet.  The maximum operating pressure is the maximum working pressure the cylinder can sustain.  The bore diameter refers to the diameter at the cylinder bore.  The rod diameter refers to the diameter of the rod or piston used in the cylinder.

Choices for cylinder configuration are simple configuration or telescopic figuration.  A simple configuration hydraulic cylinder consists of a single cylindrical housing and internal components.  A telescopic configuration hydraulic cylinder uses "telescoping" cylindrical housings to extend the length of the cylinder. Telescopic configuration cylinders are used in a variety of applications that require the use of a long cylinder in a space-constrained environment.  Hydraulic cylinders can be single action or double action.  A single action hydraulic cylinder is pressurized for motion in only one direction.  A double action hydraulic cylinder can move along the horizontal (x-axis) plane, the vertical (y-axis) plane or along any other plane of motion.  Choices for mounting method include flange, trunnion, threaded, clevis or eye, and foot.  The mount location can be cap, head, or intermediate.  Materials of construction include steel, stainless steel, and aluminum.  Common features for hydraulic cylinders include integral sensors, double end rod, electro-hydraulic cylinders, and adjustable stroke.

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Part Numbers for Hydraulic Cylinders