High temperature bearings with filling slots have afilling slot in both the inner and outer rin enabling more and largerballs to be incorporated than in standard deep groove ball bearings.Filling slot bearings have a higher radial load carrying capacity thanbearings without filling slots, but their axial load carrying capacityis small. They are also unable to operate at such high speeds asbearings without filling slots. Depending on the main application forwhich they are used, deep groove ball bearings with filling slots have acage or no cage.