We have 3 vertical pumps that have the drives above a pit with 1 15/16 shafts that attach to a simple impeller used to circulate water through a flume to transfer and wash potatoes. The problem is that 4 of the 5 bearings on each shaft are constantly under water. The stainless Survivor bearings get about 6 months of 72 hours a week running before we have to change them. The water is fairly dirty because of the wash coming off the potatoes. My question is if there is a better bearing out there or is this a pretty good run time for a bearing. We grease them weekly with a marine grease. Thanks for the replies..PaLuke

Does the grease used to lubricate the bearings need to be NSF registered for contact with food?

Yes, it needs to be food grade. It seems like the housings wear before the actual bearing. Rarely do we get wear between the inner race and the shaft. Thanks for the reply........PaLuke