Rodless cylinders are linear devices that use pressurized fluid to move a load within power transfer operations. They are made of aluminum, steel, stainless steel, or plastic and driven by an electric motor, pneumatic or hydraulic assembly, or electrohydraulic pump. Guided cylinders are directed by attached rods or rails. Unguided cylinders are directed by external hardware associated with the application. There are several basic coupling styles for rodless cylinders. Band cylinders or direct-coupled cylinders are connected to the cylinder flange with a table, stage, or other moving element. Plastic or stainless steel sealing bands are used along the axis of travel. Magnetically-coupled rodless cylinders are moved by a magnetic field and enclosed to prevent the ingress of contaminants. Cable cylinders pass cables from the ends of a gland seal to a pulley that connects to the moving element. In turn, this moving element is attached to the cable from the opposite cylinder end.
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