piston cylinder device (10) witha housing (12),a piston rod (14) with an outer thread (44) in a longitudinal direction (L) within the housing (12),a piston (16) with an inner thread (46) which is soluble on the piston rod (14),a pressure chamber (48) fitted inside the housing (12) to produce the longitudinal movement of the piston rod (14) with pistons (16),-characterized by the fact that-in the connection area of the piston (16) to the piston rod (14) the front surface (32) of the piston rod (14) in the case of a connected piston (16) opposite the front surface (34) of the piston (16) in longitudinal direction (L) has an overhang (40),On the front surface (32) of the piston rod (14) is a pre-tensioning device with a clamping plane disc (26), which in radial direction (R) has a forward area exceeding the outer contour of the piston rod (14) (26), which causes a gap between the forward area (26) and the front surface (34) of the piston (16),The pre-tensioning device in the forward area of the clamping disc (26) is tensioned with the piston (16) over clamping screws (24), exerting a pre-tensioning force on the outer and inner thread (44, 46),The pre-tensioning force is greater than the force exerted by the pressure medium (48) against the pre-tensioning device/clamping disc (26).
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