In the process of using Timken bearings, grease is very critical. If Of Timken deteriorated grease is used, it will not only fail to play its due role, but also damage Timken bearings.
① Oil flow observation method
Take two measuring cups, one Of Timken containing the lubricating oil to be checked and the other empty on the table. Lift the measuring cup filled with lubricating oil 30-40 cm away from the table and tilt it, let the lubricating oil flow slowly into the empty cup, and observe its flow.
The lubricating oil with good quality should flow slender, Of Timken uniform and continuous. If the oil flow is fast and slow, sometimes large pieces flow down, The lubricating oil has deteriorated.
② Hand twisting
Twist the lubricating oil between the thumb and index finger and grind it repeatedly. The better Of Timken 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 Of Timken lubricating oil and it can not be used again. It should be replaced with a new lubricating oil.
③ Illumination method
On sunny days, 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. It can continue to function. If there are too many wear debris, replace the lubricating oil.
④ Oil drop trace method
Take a clean white filter paper and drop several drops of oil on the Of Timken 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 many impurities in the lubricating oil. Good Of Timken lubricating oil has no powder, and it is dry and smooth by hand and shows yellow traces.
4. Mixed grease
Never mix incompatible oils and fats. If two incompatible oils and fats are mixed, their consistency will soften, and the IKO bearing Of Timken may be damaged due to the easy loss of grease.
If you don’t know what kind of grease IKO bearing used originally, you must completely remove the old grease inside and outside IKO bearing before adding new grease.
5. Classification of oils and fats
It is mainly distinguished according to the temperature and working conditions: the grease can be classified according to their allowable working temperature. The consistency and lubrication ability of the grease are affected by the working temperature.
The IKO bearing operating at a certain temperature must choose the grease with correct consistency and good lubrication effect at the same temperature. Grease is made in different working temperature ranges, which can be roughly divided into low temperature, medium temperature and high temperature grease.
At the same time, there is a kind of grease called extrusion resistance or extrusion resistance, and molybdenum disulfide is added. At the same time, additives are added to strengthen the strength of lubricating oil film.
6. Important factors for selecting oil
If the grease is selected incorrectly, all measures to prevent IKO bearing are also futile. It is very important to select a grease whose base oil viscosity can provide sufficient lubrication effect at the working temperature. The viscosity is mainly affected by the temperature.
It decreases with the increase of temperature and increases when the temperature decreases. Therefore, the base oil viscosity at operating temperature must be known. Machinery manufacturers usually specify the use of a certain grease, but most standard greases have a wide range of applications.
The following are several important factors for selecting grease: type of machinery; Type and size of IKO bearing; Operating temperature; Workload; Speed range; Working conditions, such as vibration and the direction of the spindle is horizontal or vertical; Cooling condition; Sealing effect; Peripheral environment.