Abstract: Apparatus for determining the properties of lubricants which is of comparatively simplified construction and is capable of analyzing the properties of a lubricant in a relatively short period of time with a relatively small quantity of lubricant in a highly accurate manner. The apparatus comprises an axial cylindrical roller bearing supported on the frame of the apparatus by a hydrostatic cushion. The apparatus includes a disc member which supports the housing disc of the axial cylindrical roller bearing which is engaged by a leaf spring equipped with a resistant strain gauge for measuring the moment of friction. A bell-shaped top lies on the spindle disc of the axial cylindrical roller bearing and is rotated by motor with an infinitely variable drive to which a tachometer is connected by a distance gauge arranged between the disc member and the bell-shaped top which measures a change in the distance of the contact surface of the axial cylindrical roller bearings and consequently the lubricant film thickness.

Abstract: The shaft of a spinning rotor is journaled for rotation on pairs of rollers, and is urged against the rollers by a drive belt. The end of the shaft away from the rotor has a taper fitted into a corresponding taper of the central hole of a rolling bearing. The shaft may be held in the bearing by a permanent magnet spaced from the end of the shaft, or by an O-ring engaging grooves in extended portions of this shaft and bearing inner ring.

Abstract: A holding disk, having, in the center, a sleeve-shaped section provided with a thread and, at the outer periphery, an annular flange running in radial direction and displaced axially in relation to the sleeve-shaped section. The connecting section between the sleeve-shaped section and the annular flange joining the end of the sleeve-shaped section is turned away from the annular flange.