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Drag losses

Bearings lubricated by the oil bath method are partially submerged or, in special situations, completely submerged. The drag losses that occur when the bearing is rotating in an oil bath contribute to the total frictional moment and should not be neglected. Drag losses are not only influenced by bearing speed, oil viscosity and oil level, but also by the size and geometry of the oil reservoir. External oil agitation, which can originate from mechanical elements, like gears or cams, in close proximity to the bearing should also be taken into consideration.


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