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1 rolling bearing with to be able to make the bearing installation and removal easy, as far as possible time, labor saving, spending three points;
2 in order to reduce the do skf yet 206 bearings need greasing bearing ring deformation degree, and to give full play of nj 2210 dimensions the bearing capacity, bearing rings on the good support and even stress;
3 must adapt to the axial position, a floating within a certain range, so the free end bearings must be able to change in length and shaft and bearing seat hole adapted to do skf yet 206 nj 2210 dimensions bearings need greasing;
4 there is the ring on the mating surfaces cannot slide along tangential direction, so as to avoid damage the mating surfaces;

Grease is used to lubricate the bearing, of course, is the more the better, in fact. Bearing inner add grease much is not necessary, it will increase the friction, the temperature increases. And fat is too small, the oil film repair of lubricating grease is not strong, will make the bearing lubrication state of deterioration. Therefore, determining the amount of nj 2210 dimensions filling lubrication do skf yet 206 bearings need greasing bearing grease suitable is very important. Spherical ball bearing grease filling quantity in general refer to the following principles:
(1) the viscosity of lubricating oil are the basic factors for the formation of the lubricating film. In speed, load and temperature is not too high operating conditions, the medium viscosity lubricating oil. In the heavy load, low speed and high temperature conditions, selection of nj 2210 dimensions high viscosity lubricating oil or add lubricating oil extreme pressure antiwear agent. At low load, high speed and low temperature conditions, using low viscosity lubricating oil.
(2) in a wide temperature range, light load and high speed condition, and other special requirements, the selection of nj 2210 dimensions synthetic lubricating oil.
(3) internal combustion engine oil as an example, selects the proper viscosity and high viscosity index, so that oil has high viscosity enough to do skf yet 206 bearings need greasing ensure the lubrication of the engine in operation and sealing, but also at low temperature is small enough to ensure the viscosity - temperature startup performance. The viscosity of the choice is usually according to temperature conditions, but also to consider the factors of load level, speed or engine wear etc..