Premium: The highest quality on the market. Very low noise. Very low vibrations. The versions with wiping double-lip seals are sealed really good. This leads to a mentional friction. Alternatively, this quality is also available with non-contacting shields. On choice not self-aligning or self-aligning.

Easy-Line: Very high quality. Very low noise. Very low vibrations. Extremely light running. This version with swimming, rarely contacting seals is not so good sealed. Self-aligning.

Standard: If it is not otherwise described, we use linear bearings of a reliable brand in high quality. Yet low noise. Better sealed and so with more friction than the Easy-line. Self-aligning.

ST (Steel-sleeve-version): Medium quality. The steel housing is used as ball bearing race. Little noise and vibrations. Unexpensive and reliable. Not self-aligning.

Low quality: On the market, you can find linear ball bearings at low prices, which are very loud and much vibrating. Such bearings, we don´t have in our assortment.