ABEC 5
The classification ABEC stands for Annular Bearing Engineers Committee and classifies how fine the rolling bodies (the beads in the bearings) are worked out. The higher the ABEC level, the more precise the production and the better the rollers run. ABEC 5 is characterized by relative smoothness and easy rotation of the wheels. Thus, the power can be transferred efficiently when driving. However, it should be noted that the smooth running of a ball bearing is also influenced by other factors - such as the materials used for the various components of a bearing, as well as by the choice of lubricant.
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