Abstract: A modular system of driving devices that each includes a rotary drive assembly and a spindle drive assembly. The modular system includes at least two rotary drive assemblies and at least two spindle drive assemblies which are formed with coupling elements which are compatible with one another. The rotary drive of the driving device is received in a housing tube which is closed at its end remote from the spindle drive by a base piece. The base piece and the housing tube are manufactured from plastics material and are connected to one another by cohesive bonding.

Abstract: The invention relates to a driving device which is composed of a rotary drive assembly and a spindle drive assembly which are both removed from a modular system which comprises at least two rotary drive assemblies and at least two spindle drive assemblies which are formed with coupling elements which are compatible with one another. The invention also relates to a driving device, of which the rotary drive is received in a housing tube which is closed at its end remote from the spindle drive by a base piece, wherein the base piece and the housing tube are manufactured from plastics material and are connected to one another by cohesive bonding. Finally, the invention also relates to a modular system from which the rotary drive assembly and a spindle drive assembly are removed.