Abecprecision - Glossary - Technical Information - Hobby and Engineering

Glossary - ABEC Precision Grade

The ABEC Precision Grade is a scale of tolerances to which precision bearings are manufactured. The scale range is 1, 3, 5, 7 and 9, with 9 being the highest grade. High rated bearings are intended for precision applications like aircraft instruments or surgical equipment. Lower grades are intended for the vast majority of applications such as vehicles, mechanical hobbies, skates, fishing reels and industrial machinery. High ABEC rated bearings allow optimal performance of critical applications requiring very high RPM and smooth operation. High ABEC rated bearings do not make equipment go faster or smoother, they allow high precision equipment to operate at their optimum speed and efficiency.

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