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Hartech in England is doing original material IMS bearings but removing the inner seal so the method of lubrication is the same as the LN bearing. Installation difficulty/risk the same. Probably much better materials in the LN bearing.
For now Charles is being cautious on any claims of longevity until there are more high mileage examples of the replaced LN bearing returned to he (and Ed, the bearing engineer) for analysis. Their expectation is the longevity will be actually much longer than the 30k. But until the sample gets big enough and the analysis is done, who can be sure.
There is wear and failure in every rotating part. Some fail earlier than others, some later.
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