NSK bearings installed sealed tight will increase bearing friction

NSK bearings after installation, the reason of difficulty of rotation bearing NSK bearings after installation, turn the NSK bearing outer ring or shaft by hand, feel the rotation is not flexible, mainly the following several reasons: 1) , iron oxide, dirt and other contaminants into the NSK bearings, such as cushion and grinding effect; 2) , water, acid, alkali and other corrosive medium in NSK bearings, NSK bearings produce rust; 3) NSK bearings, clearance is too small, or NSK bearings work make inner ring expansion with temperature rise is too large; 4) Insufficient, lubricants, is completely dry or too much; 5) NSK bearing, axis neck, shoulder, the manufacturing precision of deformation in low or use; 6) And install seal is not correct, such as sealing too tight or seals and related parts friction; 7) , cage deformation; 8) NSK bearings, to add load, axial load is too big. NSK bearings in operation process or processes in the high strength work environment, there must be overheating phenomenon appeared. So, in order to prevent hot phenomenon and cause the damage of NSK bearings, we shall not take corresponding measures. ( 1) Strictly control the lcrl8Ni9] Ri stainless steel casing, flange forging heating temperature and heating time of heat preservation, prevent work-piece overheating make coarse grains. ( 2) NSK bearings workpiece heat treatment solid solution treatment temperature is unfavorable and exorbitant, heat preservation time shoulds not be too long, the heating temperature should be no higher than 1150 C, the heat preservation time to 1 a l_5min/mm calculation is advisable. ( 3) Artifacts in forging production, such as forging ratio is too small, the final forging temperature on the high side, also easy to appear coarse grain structure defects, should make the workpiece forging ratio appropriate, sufficient, finish forging temperature is moderate. ( 4) Bulky artifacts, to prevent excessive tissue can be used to forge refine grain method to eliminate defects, to prevent the occurrence of orange peel during cold deformation of workpiece surface defects, improve the surface quality of workpiece.