1. Decreasing viscosity has a negative impact on stop-start bearing wear across all material types 2. However, impact on higher cost polymeric bearings is lower than for cheaper aluminium bimetal bearings 3. Therefore, as OEMs move to lower viscosity oils and stop-start becomes more prevalent in HDD, a cost-effective solution to bearing wear will be required for the 2025-2030 timeframe, via either: a. More cost effective journal bearing material solutions b. Additive solutions that deliver bearing durability at lower viscosities, under dynamic stop-start lubrication regimes.
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