Operation of TIMKEN imported bearings should be regularly maintained

1, grease lubrication

Relubrication of TIMKEN imported bearings is best carried out during planned equipment downtime and is periodically replenished, while removing old grease or extruding old grease through the drain. Wipe the grease fittings clean before adding fresh grease. If the bearing housing does not have a grease fitting, the bearing housing cover or end cap should be opened to remove the old grease and, after cleaning, replenish the same type of fresh grease.

2, lubricating oil lubrication

Regularly check the oil level and oil quality of the lubricating oil. Under normal circumstances, the normal oil level should be within the range of 1/3-2/3 of the equipment oil level window or mark. The oil filling method is oil cup, the oil level shown only represents the oil replenishing capacity, and the bearing tank oil level is to meet the operation requirements. The oil level in the oil cup is less than 1/4 of its total volume.

Check and replenish the oil method, take a small amount of lubricating oil as a sample and compare it with fresh oil. The competent unit can consider the oil quality test to ensure the oil quality is qualified. If the sample looks cloudy, it may be the result of mixing with water, which is commonly referred to as oil emulsification. At this point, the lubricant should be replaced.

If the sample is darkened or thickened, it may indicate that the lubricant has begun to carbonize and the old lubricant should be completely replaced. If possible, flush the oil line with fresh oil. When changing the lubricating oil, make sure that the new and old models of the replaced oil are the same and supplement the required oil level.

Use an oil bath type lubrication system. If the oil temperature is below 60 ° C (140 ° F) and the lubricant is not contaminated, replace the lubricant once a year. If the oil temperature is 60-100 ° C (140-210 ° F), the lubricant needs to be replaced four times a year. If the oil temperature is between 100 and 120 ° C (210-250 ° F), the lubricant needs to be replaced once a month. If the oil temperature is above 120 ° C (250 ° F), the lubricant needs to be replaced once a week.

Proper installation and maintenance are important factors in the normal operation of the bearing. At the same time, care must be taken to maintain the cleanliness of the bearing. Bearings must be protected from contaminants and moisture and must be properly installed and lubricated. In addition, the design of the bearing arrangement, the condition of the oil seal, the form of the lubricant and the replacement cycle and the special maintenance also play an important role and must be paid attention to.

For more information and purchase please visit: https://www.supplyforever.com

Original NSK bearing common fault analysis

1. NSK bearing surface strain: cutting abrasive grains are found in the iron spectrum, and the abrasive grain composition is non-ferrous metal.

2, NSK bearing journal surface corrosion: Spectral analysis found that the concentration of iron is abnormal, there are many sub-micron particles of iron in the iron spectrum, the lubricating oil exceeds the standard or the acid value exceeds the standard.

3, NSK bearing tile surface corrosion: spectral analysis found that the concentration of non-ferrous metal elements is abnormal; there are many sub-micron wear particles of non-ferrous metal components in the iron spectrum; lubricating oil moisture exceeds the standard, acid value exceeds the standard.

4, NSK bearing tile back fretting wear: spectral analysis found that the iron concentration is abnormal, there are many iron components in the iron spectrum sub-micron wear particles, lubricating oil moisture and acid value is abnormal.

Under liquid lubrication conditions, the sliding surface is separated by the lubricating oil without direct contact, and the friction loss and surface wear can be greatly reduced. The oil film also has a certain vibration absorbing capability.

5, NSK bearing journal surface strain: iron spectrum cutting abrasive grains or black oxide particles in the iron spectrum, tempering color on the metal surface.

6. Super-precision NSK bearings do not produce metamorphic layers and spikes that are extremely prone to wear, and can also remove the metamorphic layer left by grinding. Increase the service life of the workpiece by about 5 times.

7. The workpiece after super-finishing after NSK bearing grinding can reduce the running noise by 8~10dB after assembly, and the vibration is small. Smooth operation.

8. The margin of ultra-finished NSK bearings is reduced by an order of magnitude compared to the grinding allowance, which is actually only a few microns. For low pressure feed processing. Therefore, the super-finishing has a small dimensional dispersion and an extremely high yield.

9. Super-precision NSK bearing surface is cross-mesh, easy to store oil, and will not be easy to wear, easy to heat and burn phenomenon during grinding.

10. Super-precision NSK bearings have more complicated trajectories and can be transferred from grinding to grinding, which can reduce surface roughness faster. However, due to its repeated changes in the direction of motion, it affects the quality of the machined surface.

For more information and purchase please visit: https://www.supplyforever.com