Q:

Which bearings are faster: ABEC 5, ABEC 9, ABEC 7, or ABEC 11?

A:

Quick Answer

An ABEC 11 bearing is the fastest bearing because it has a higher Annular Bearing Engineers' Committee rating, which means it is more precise and faster than lower-rated bearings. The ABEC scale is the method used by Americans to rate the accuracy and tolerance of bearings, as of 2015.

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Full Answer

Most ABEC scales only go up to nine, and anything over this level is exceedingly fast. The numbers refer to a degree of roundness in the inner and outer races of a bearing. As the ABEC rating increases so does price: ABEC 1 bearings are the cheapest, most crude bearings, while ABEC 9 bearings are extremely costly and smooth. Companies that sell cheap ABEC 9 bearings are most likely selling bearings that are not rated truthfully according to the ABEC scale.

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