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Q: How much maintenance do bearings require?
…depends on the type of enclosures and lubricants your bearings have. Rubber sealed or Ultra sealed bearings require no maintenance and the lube is good for the life of the bearing.…
Q: What is the performance difference between the following threetype of bearings: Ceramic Metal Shield, Ceramic Yellow Seal andCeramic Ultra Seal?
…they are contact rubber seals there is a certain amount of friction, which will lessen the more they are used and Ceramic Ultra Seal have a PTFE seal that sits under a metal shield…