Polygon mirror drive motor assembly

PURPOSE: To provide a shaft support assembly particularly well suited for supporting the high speed rotor in a laser polygon mirror drive motor assembly. CONSTITUTION: A rotor 5 has conically tapered ends 5r, 5r. These ends are supported by a conical plain bearings 3, 3. At least one of the beaings is adjustable with respect to the shaft and the bearings so that the gap between the shaft and bearing can be easily adjusted.