Abstract: A bearing system includes a housing having an interior that is configured to contain a quantity of grease or oil, a bearing mounted in the interior of the housing, and a system for introducing an inert gas into the interior of the housing. The inert gas is preferably substantially oxygen free so as not to oxidize the grease or oil.

Abstract: A method for measuring a viscosity of an oil includes placing a drop of the oil on a piece of blotter paper to form a stain, measuring a size of the stain at a given time after placing the drop of the oil on the piece of blotter paper and determining the viscosity of the oil by comparing the size of the stain with empirical data relating stain size, time and oil viscosity. Also a kit for performing the method.

Abstract: A deep groove ball bearing providing an inner ring, an outer ring and a plurality of balls being arranged between the inner ring and the outer ring. The inner ring and the outer ring each include a raceway for the plurality of balls. Each raceway encompasses the plurality of balls symmetrically. The deep groove ball bearing is lubricated by a lubricant being arranged on each axial side of the plurality of balls. The raceways are offset in the same axial direction from the axial center of the inner ring and the outer ring such that the raceways are offset to the axial side of the deep groove ball bearing where the shear rate acting on the lubricant is higher than on the other axial side of the deep groove ball bearing.

Abstract: A deep groove ball bearing providing an inner ring, an outer ring and a plurality of balls being arranged between the inner ring and the outer ring. The inner ring and the outer ring each include a raceway for the plurality of balls. Each raceway encompasses the plurality of balls symmetrically. The deep groove ball bearing is lubricated by a lubricant being arranged on each axial side of the plurality of balls. The raceways are offset in the same axial direction from the axial center of the inner ring and the outer ring such that the raceways are offset to the axial side of the deep groove ball bearing where the shear rate acting on the lubricant is higher than on the other axial side of the deep groove ball bearing.