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Reasonable selection and add oil. To use the process of selection of the lubricant film surface tension, so the formation of the bubble collapse impact of the oil flow is reduced accordingly, can be effective in preventing bearing cavitation; lubricant viscosity grade can not be arbitrarily increased, so as not to increase the bearing the coking tendency; engine lubricant oil level must be within the standard range of lubricants and refueling tools must be cleaned to prevent any dirt and water to enter while ensuring engine ministries seal effect. Attention to regular inspection and replacement of oil; places filling oil should be pollution-free, no sand, to prevent the intrusion of all pollutants; different quality, different viscosity grade lubricants as well as different types of use prohibit mix Lubricant fill settling time should not normally be less than 48h.
Lack of lubricant selection error, lubricants or onset of aging induration, can incur bearing vibration and noise, and this noise does not necessarily rule. About this situation, as long as the selection of a suitable smooth agent, to adjust its smooth dose, and to extend the the smooth agent use life and reasonably determine the change cycle.
Bearing pressed into the bearing rotating flexible block sense. If any signs of rotation is not flexible, indicates that the size of the shaft is too much tolerance to be reduced. Bearing pressed into the shaft turned by hand there is obviously a sense of "imperfections", it may be too much tolerance of the shaft or shaft roundness bad. Therefore, the control shaft and the bearing chamber tolerances should control roundness, many domestic manufacturers tolerance control control, no roundness.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NA5902 NSK | 15 | 28 | 18 |
| NA5901 NSK | 12 | 24 | 16 |