uniform inner rings in open, covered and-sealed bearings - small dimensional variations (eccentricity), higher surface quality / roundness and lower delivery swirl of sealing column or running surface and thus less wear / better seal life and better sealing effect for both deck and washers - less scuffing-tendency in tilt (misalignment) and axial movement of the ball bearing rings relative to each other. Application: In the automotive, electrical, transmission and in general Engineering, everywhere there are so far the conventional seals already used (see figure).