Electric motor for auxiliary unit in a motor vehicle

摘要

The electromotor has a radial roller bearing comprising an outer ring and a metal-inner ring. The inner ring is fixed on a metal-motor shaft (12), which comprises a lubricant circular groove (24) in a clearance fit-area (26) of the inner ring, where the groove is closed by the inner ring. The circular groove is filled with corrosion-resistant lubricant (28), where sum of axial length (L) of an opening of the groove amounts to one third of an axial length of the clearance fit-area. The clearance fit-area exhibits clearance of less than 10 micrometers.