INA overall eccentric arm bearing maintenance performance cautious inspection method

If the INA bearing can be used correctly if it is not selected correctly, it can be used for a long time before the service life of the whole eccentric arm bearing. On the other hand, there is an accidental early damage, and the early damage that cannot be used can be used as The reason for this early damage is that there is not enough consideration for the use of lubrication, and there are also foreign matter intrusion, the error of bearing assembly and the deflection of the shaft are large, and the research on the shaft and the bearing housing is insufficient. It can be said that these reasons overlap each other.
A comparative study of the design life of various machines and various durable overall eccentric arm bearing bearings is used, while determining the bearing size. In the selection of bearings, INA bearings tend to think that the grease life in aging, the fatigue life of the grease, wear resistance, and low noise also need to be fully studied.
In addition, depending on the application, it is necessary to select bearings for special requirements in terms of precision, clearance, cage structure, grease, etc. However, there is no order in selecting INA bearings. Rules, priority should be given to the conditions, performance, and related matters required for the overall eccentric arm bearing, especially for practical use. As long as the bearings are kept as intact as possible.
Cleaning of the bearing: Remove the bearing repair, first record the appearance of the bearing, confirm the remaining amount of lubricant, use the lubricant after sampling inspection, and clean the bearing. As a cleaning agent, gasoline and kerosene are generally used. Remove the entire eccentric arm bearing cleaning, cleaning and fine cleaning of the thick, placed in the container, put the first metal mesh bottom, so that the container does not directly contact the dirt of the bearing.
INA bearing inspection and judgment: to determine whether it can be used for cleaning the bearing to remove the bearing.
Check raceways, raceways, surface conditions, cage wear, bearing clearance and dimensional accuracy improvements, irrelevant damage, and anomalies. Non-separable small ball bearing, bearing inner ring, with one hand support level, rotating outer ring confirmed smoothly.
Therefore, it is necessary to fully understand the machine used in the bearing, the conditions of use, and the structure of the outer eccentric arm bearing. If the situation before and after the accident can be clarified, then the damage of the INA bearing and various reasons can be investigated. It can prevent the recurrence of similar accidents

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Regular inspection method for NTN thrust ball bearing lubricant

The choice of NTN bearing grease is directly related to the stable operation of the equipment. In order to better play the best condition of the bearing, the following are several important factors for selecting the grease: mechanical type; type and size of thrust ball bearing; working temperature Workload conditions; speed range; working conditions, such as vibration and the direction of the main shaft are horizontal or vertical; cooling; sealing effect; peripheral environment.
Apply a little bit of lubricant to the friction between the two fingers. If there is any contaminant, it can be felt. Or apply a lubricant on the back of the hand and then check the light.
Thrust ball bearings lubricated with oil should be refilled with fresh oil and allowed to rotate at low speed for a few minutes if the old oil is drained. As much as possible, allow the oil to collect residual contaminants and then vent the oil. Note: It is best to filter the oil before use.
1) Bearing design parameters: including the number of bearing rolling elements, ferrule wall thickness and clearance.
2) Manufacturing error of bearing parts: including NTN bearing raceway and rolling element surface roughness, ridge degree and roundness difference. A large number of experimental studies have shown that the influence of waviness on bearing vibration is dominant, while the influence of surface roughness and roundness is relatively small.
3) Bearing working conditions: During the operation of the thrust ball bearing, the load, speed and lubrication conditions have the greatest influence on the bearing vibration.
4) Bearing installation parameters: the bearing and the shaft and the bearing seat, the deflection during installation and other factors also affect the vibration of the bearing.
The use of grease-lubricated thrust ball bearings in the replacement of grease, the use of the cutter should avoid the contact of cotton with any part of the NTN bearing. Since these residual fibers may be wedged between the rolling elements and cause damage, especially the application of small bearings requires attention to this problem.
When inspecting NTN bearings, never expose the thrust ball bearings to contaminants or moisture. If the work is interrupted, cover the machine with a piece of oil-paper plastic or similar material.

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