Ceramic deep groove ball bearing which is the same as standard bearings, must always carry a given minimum load in order to achieve a satisfactory operation. See section about standard deep groove ball bearings for minimum load.
For good running of the bearing, deep groove ball bearings, like all ball bearings and roller bearings, must always bear certain minimum load, especially at high speed or acceleration, or work under the rapid change of load direction. Under these conditions, steel ball and holder inertial forces, as well as lubricant friction will adversely affect the rolling in the configuration, and between the ball and the raceway may produce damaging sliding movement.
The necessary minimum load carried by deep groove ball bearings can be calculated by formula:
| Frm | = | Minimum radial load[kN] |
| kr | = | Minimum load factor (see table) |
| ¦Í | = | the viscosity of lubrication under working condition £¬[mm2/s] |
| n | = | speed [r/min] |
| dm | = | The average bearing diameter d m = 0,5(d + D) [mm] |
Start under the condition of low temperature or very high lubricant viscosity, the minimum load may require more. The components weight which is born by bearings and external force are usually more than the required minimum load. If it has not yet reached the minimum load, the deep groove ball bearings must bear the additional radial load. In the application of deep groove ball bearings, generally adjust the relative position of inner and outer circle and use spring to exert axial load.
But the hybrid ceramic bearing is more resistant to the raceway skid and adhesive ear due to low load. This makes the hybrid ceramic bearing is a good replacement of variable load cycle (including light load) bearing.