For all bearings are extremely precise mechanisms, a designer must consider the benefits of tighter tolerances in terms of performance and bearing life. For example, there is a direct correlation with precision class and bearing life. Raceway parallelism, a feature controlled by ABEC, can impact bearing torque.
While the bearing tolerance classes primarily control boundary dimensions of the rings, it should also be noted that there are features that are critical to the bearings performance and life that are not controlled by the ABEC (or ISO) specifications. These include: internal clearance, surface finish, ball accuracy, torque, noise, cage type, and lubrication. These items should be specified along with the precision class when selecting bearings to ensure optimum life and performance.
The table below shows the equivalent tolerance grades for three of the most common standards.
Model | d/mm | D/mm | B/mm | Weight/KG |
6000ZZ | 10 | 26 | 8 | 0.042 |
6001ZZ | 12 | 28 | 8 | 0.049 |
6002ZZ | 15 | 32 | 9 | 0.066 |
6003ZZ | 17 | 35 | 10 | 0.086 |
6004ZZ | 20 | 42 | 12 | 0.152 |
6005ZZ | 25 | 47 | 12 | 0.216 |
6006ZZ | 30 | 55 | 13 | 0.256 |
6007ZZ | 35 | 62 | 14 | 0.342 |
6008ZZ | 40 | 68 | 15 | 0.423 |
6009ZZ | 45 | 75 | 16 | 0.54 |
6010ZZ | 50 | 80 | 16 | 0.575 |
6200ZZ | 10 | 30 | 9 | 0.071 |
6201ZZ | 12 | 32 | 10 | 0.082 |
6202ZZ | 15 | 35 | 11 | 0.099 |
6203ZZ | 17 | 40 | 12 | 0.143 |
6204ZZ | 20 | 47 | 14 | 0.234 |
6205ZZ | 25 | 52 | 15 | 0.282 |
6206ZZ | 30 | 62 | 16 | 0.439 |
6207ZZ | 35 | 72 | 17 | 0.635 |
6208ZZ | 40 | 80 | 18 | 0.807 |
6209ZZ | 45 | 85 | 19 | 0.897 |
6210ZZ | 50 | 90 | 20 | 1.02 |
6300ZZ | 10 | 35 | 11 | 0.117 |
6301ZZ | 12 | 37 | 12 | 0.132 |
6302ZZ | 15 | 42 | 13 | 0.181 |
6303ZZ | 17 | 47 | 14 | 0.254 |
6304ZZ | 20 | 52 | 15 | 0.317 |
6305ZZ | 25 | 62 | 17 | 0.511 |
6306ZZ | 30 | 72 | 19 | 0.763 |
6307ZZ | 35 | 80 | 21 | 1.01 |
6308ZZ | 40 | 90 | 23 | 1.4 |
6309ZZ | 45 | 100 | 25 | 1.84 |
6310ZZ | 50 | 110 | 27 | 2.36 |
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