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61820 deep groove ball bearing  

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61820 deep groove ball bearing

Bearing in operation process, in order to provide better performance, generally using grease lubricated bearings, bearing operation can decrease the friction degree and temperature, if the grease is bad, not only plays the role of relevant, using instead of bearing more unfavorable, so we must buy grease to learn how to identify the grease has changed. Judge the method of lubricating grease metamorphism: 1, oil flow observation method Take two cups, one Sheng to be oil check, another empty on the table will be filled with lubricating oil cup held high 30-40 cm away from the desktop and tilt, let oil flow slowly onto the empty cup, to observe the flow of lubricating oil, good quality flow should be slender even if without stop, oil flow unsteadiness and large flow, said lubricating oil has deteriorated. 2. Hand twisting The lubricating oil is rubbed repeatedly between the thumb and index finger. The better lubricants feel lubricity, wear debris and no friction. If they feel the lar…