Control spool for hydraulic or pneumatic control systems and method of producing it

摘要

Flat prominences (6) made of a material with good sliding properties are attached at a distance from one another to the cylindrical control spool sections (2) of a control spool (1). The thickness of the prominences (6) is less than the clearance between the cylindrical control-spool sections (2) and the associated cylindrical bore sections (5) of a stepped control-spool bore (4). The prominences (6) hold the control spool (1) essentially concentrically in the control-spool bore (4) and prevent displacement or deformation of the control spool (1) on one side. <IMAGE>