Abstract: An electric motor has a rotor shaft which is journalled in an axial bearing located within a bearing tube of a stator. To control relative axial movement of the rotor shaft and bearing, a butting ring is fixed, by supporting arms, in the butt end of the rotor shaft. An abutment surface of the butting ring abuts an end face of the bearing. Lubricant pockets are formed in the abutment surface to hold a lubricant. A further supply of lubricant is received within a lubricant storage pocket formed in a surface of said butting ring opposed to said abutment surface. The lubricant storage pocket is connected to the lubricant pockets by way of connecting channels.

Abstract: The invention relates to a miniature axial fan particularly of an axially compact construction, having a central motor driving a rotor disk with a housing surrounding the rotor disk in which an interior housing wall on the inflow side is cylindrical and extends past the axial center of the housing and then this cylinder wall expands outwardly to the outlet side of the housing to produce an enlargement of the flow cross-section. The housing has webs extending inwardly from the outlet side of the housing that carry the central driving motor with the rotor disk. A number of blades are mounted on the rotor disk which numbers differs from the number of webs.