NTN creep prevention bearings, The boundary dimensions of expansion compensating deep groove ball bearings are the same as for standard bearings, but formed high polymer material with a high expansion rate is provided in the grooves on the outer circumference of the outer ring.
Due to the extremely small difference of thermal expansion attained between the fitted surfaces of the high polymer equipped outer ring and the light alloy bearing housing, a good interference fit can be achieved with stable performance across a wide temperature range. Another advantage is a large reduction in the occurrence of outer ring creeping.
Maximum allowable load Cp (refer to the table of boundary dimensions) has been determined in accordance with outer ring strength; therefore, it is necessary to select a bearing with a maximum allowable load greater than the largest anticipated bearing load.
Radial internal clearance
Radial internal clearance are the same as those for standard deep groove ball bearings. With standard fit and application conditions, a C3 clearance is used.