Water pump bearings are double row bearings and, in contrast to
conventional double row bearings, do not have an inner ring but
raceways machined directly into the surface of the shaft. As a result,
there is more space available for the rolling elements, giving a higher
specific load carrying capacity than that of solutions with conventional
single bearings. Furthermore, it is possible in this type of bearing to
achieve economical combinations of ball and roller rows. In a small
design envelope, this gives a broad range of load carrying capacities.
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Product-lubricated Pump Bearings
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