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Brad:
Nobody, including the LN developers, is denying that compromised lubrication did not play a role in IMSB failures. It probably was the root cause of most dual row OEM failures and about 1% of the single row ones. Poor lubrication doesn't explain the other 7% of single row OEM breakdowns. Weaker load carrying capacity probably does because that's the one key difference between dual and single row designs.
People need an answer to a critical threshold question before choosing between LN Retrofit or a DOF lubricated unsealed bearing, namely is lubrication still a problem for unsealed replacement IMSBs?
The LN data makes a strong case that the answer to the question is that there is no lubrication problem for unsealed replacement IMSBs. Not surprisingly, one DOF developer regularly says that lubrication is still a problem but he doesn't offer any hard facts to support his view.
Thom
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