Magnetic Ball Bearing Introduction：
Magnetic ball bearing is single row ball beaing. It is also known as magneto bearing.
For this bearing, inner ring groove is slightly shallower than that of deep groove ball bearing, and the inner diameter of the outer ring is cylindrical from the bottom of the outer groove.
The outer ring can be separated, which is easy for installation. Normally, bearing cage is brass.
Usually, two sets of bearings are used oppositely.
This kind of bearing has an inner diameter of 4-20mm and belongs to small bearing.
Magnetic motor bearings are widely used in small generators, gyroscopes, metering together, etc..
Bearing Code Meaning:
E：bearing outer ring with + tolerance, for example E10
EN: bearing outer ring with – tolerance, for exampe EN15
Megnetic Ball Bearings Size Chart:
| E Series | EN Series | d (mm) | D (mm) | B,T (mm) | Dynamic C | Static C | Mass (kg) |
| E4 | EN4 | 4 | 16 | 5 | 168 | 26 | 0.005 |
| E5 | EN5 | 5 | 16 | 5 | 168 | 26 | 0.005 |
| E6 | EN6 | 6 | 21 | 7 | 254 | 40 | 0.011 |
| E7 | EN7 | 7 | 22 | 7 | 254 | 40 | 0.013 |
| E8 | EN8 | 8 | 24 | 7 | 350 | 58 | 0.016 |
| E9 | EN9 | 9 | 28 | 8 | 465 | 79 | 0.024 |
| E10 | EN10 | 10 | 28 | 8 | 465 | 79 | 0.023 |
| E11 | EN11 | 11 | 32 | 7 | 450 | 78 | 0.029 |
| E12 | EN12 | 12 | 32 | 7 | 450 | 78 | 0.028 |
| E13 | EN13 | 13 | 30 | 7 | 450 | 78 | 0.022 |
| – | EN14 | 14 | 35 | 8 | 590 | 106 | 0.035 |
| E15 | EN15 | 15 | 35 | 8 | 590 | 106 | 0.034 |
| BO15 | – | 15 | 40 | 10 | 750 | 139 | 0.06 |
| – | EN16 | 16 | 38 | 10 | 705 | 127 | 0.048 |
| L17 | – | 17 | 40 | 10 | 750 | 139 | 0.055 |
| – | EN17 | 17 | 44 | 11 | 750 | 138 | 0.078 |
| BO17 | – | 27 | 44 | 11 | 750 | 138 | 0.075 |
| – | EN18 | 18 | 40 | 9 | 515 | 97 | 0.05 |
| E19 | EN19 | 19 | 40 | 9 | 515 | 97 | 0.048 |
| E20 | EN20 | 20 | 47 | 12 | 1120 | 218 | 0.08 |
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