If two incompatible greases mixed, never mix incompatible greases. Consistency will usually become soft, final loss damage because fat easily, if you do not know you FAG bearings used grease, then first of all, the original grease all clear, and then add a grease lubricated.
We use FAG as often encounter this or that situation, which is how, when forming the how to resolve, have always been the technicians of the enterprises most headache problem, transient high temperature can make the surface of the grinding zone a certain depth (10~100nm) by heating above the tempering temperature of heating the workpiece inside. Does not meet the of austenite temperature case, with the improvement of heating temperature, its surface layer-by-layer corresponds to the heating temperature and high temperature tempering or tempered microstructure transformation, decline the hardness. Higher heating temperature, hardness and also more powerful.
In grinding, grinding wheel and workpiece contact zone, consume large amounts of energy, produce a lot of grinding heat, causing local instantaneous temperature of grinding zone. Applying the theory of linear motion-heat-source heat transfer formula, calculate, or application of infrared measurement and thermocouple method under experimental conditions the instantaneous temperature, can be found at 0.1~0.001ms in grinding zone of instantaneous temperature can be as high as 1000~1500℃. Such a transient high temperature enough to make the certain depth temperature on the surface layer of oxide on the surface, non-crystalline, high-temperature tempering, quenching for the second time, or even burn crack a variety of changes.
Steel surfaces under transient high temperature and oxygen in the air, rising into very thin (20~30nm) thin-layer iron oxides. Worthy of note is the thickness of the oxide layer and surface grinding of degenerating layer corresponds to the total thickness of test results is related. This shows its directly related to the thickness of the oxide layer and grinding are important signs of grinding quality.
Used in the FAG bearing grease has rust. Rust of performance bad main is see oil of soluble, different sticky consistency and different information formed of grease, has different grade of anti-capacity and rust performance, General of,, sticky consistency large and fat dissolved sexual poor of oil waterproof sexual better, such of oil even in FAG bearing cavity in the full has water, also can in steel appearance formed a layer can resist of oil film. Bike due to speed low, oil of select can relative with sticky consistency slightly high, but waterproof sexual very strong of type, because bike in wash car, rainy day, cross-country, are often and water deal, this on makes waterproof sexual very important, even is slightly sticky heavy of oil, also does not effects low turning Xia of smooth, and once surface formed has oxidation damage, that entire stripping process and aging process are will fast of increased.



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