If the grease used in SKF tapered roller bearing is expired and cannot be used, if you do not pay attention, it will cause great damage to SKF tapered roller bearing. Therefore, you must learn how to judge whether the grease can be reused.
1. Oil drop trace method
Take a clean white filter paper and drop several drops of oil on the Skf Tapered Roller Bearing filter paper. After the lubricating oil leaks, if there is black powder on the surface and there is a sense of astringency by hand,
it indicates that there are a lot of impurities in the lubricating oil. The good lubricating oil has no powder. It is dry and smooth by hand and shows yellow traces.
2. Hand twisting
Twist the lubricating oil between the thumb and index finger and Skf Tapered Roller Bearing grind it repeatedly. The better lubricating oil hand feels lubricity, less wear debris and no friction.
If it feels a large friction feeling such as sand particles between the fingers, it indicates that there are many impurities in the Skf Tapered Roller Bearing lubricating oil and it can not be used again. It should be replaced with a new lubricating oil.
3. Illumination method
On a sunny day, lift up the lubricating oil with a screwdriver at an angle of 45 degrees to the horizontal plane. Observe the condition of oil drops according to the sunlight. In the light, it can be clearly seen that there is no wear debris in the lubricating oil, which can inherit the function. If there are too many wear debris, replace the lubricating oil.
4. Oil flow observation method
Take two measuring cups, one containing the lubricating oil to be checked and the other empty on Skf Tapered Roller Bearing the table. Lift the measuring cup filled with lubricating oil 30-40 cm away from the table and tilt it to let the lubricating oil flow slowly into the empty cup and observe its activity.
The lubricating oil with good Skf Tapered Roller Bearing quality should flow slender, evenly and continuously. If the oil flow is fast and slow, sometimes large pieces flow down, The lubricating oil has deteriorated.
When inspecting the NSK thrust ball bearing removed during the regular maintenance and operation of NSK thrust ball bearing equipment and the replacement of peripheral parts, it is necessary to judge whether the parts of secondary NSK thrust ball bearing can be reused and record the good or bad use.
It is also necessary to carefully investigate and record the Skf Tapered Roller Bearing appearance of the removed NSK thrust ball bearing. In order to find out and investigate the remaining amount of lubricant, clean NSK thrust ball bearing well after sampling.
Secondly, check the raceway surface, rolling surface and mating surface of NSK thrust ball bearing and the wear state of cage for damage and abnormalities, especially observe the running track of raceway surface.
Judge whether the bearing can be used again after considering the degree of bearing damage, machine performance, importance, operating conditions, inspection cycle, etc.
According to the inspection results, if the NSK thrust ball bearing is found to be damaged or abnormal, please find out the causes and formulate countermeasures according to the phenomenon of bearing damage.
In addition, according to the Skf Tapered Roller Bearing inspection results, if there are the following defects, the NSK thrust ball bearing can no longer be used and needs to be replaced with a new bearing.
a. Any one of the inner and outer rings, rolling elements and cage has cracks and fragments.
b. Any one of the inner and outer rings and rolling elements has peeling.
c. The raceway surface, retaining edge and rolling element are significantly jammed.
d. The cage is seriously worn or the rivets are loose.
e. The raceway surface and rolling element are rusty and scarred.
f. The rolling surface and rolling body have significant indentation and indentation.
g. There is creep on the inner diameter surface of the inner ring or the outer diameter of the outer ring.
h. Overheated and discolored.