Replaced some Winsinn fluid bearing 5015 with these Dual Ball Bearing 5015s and the noise level dropped immensely.
Gone is the grindy noise of a Fluid Bearing with dust in it (I live in a dusty area, Fluid Bearings die within 3 months here).With over 200 hours of printing, the DBB fan is still quiet and these is about the point where the fluid bearing would be starting to make lots of noises.
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