The simplest and most practical method for identifying […]
The simplest and most practical method for identifying the pros and cons of lubricating oil, so as to avoid the purchase problem when selecting the lubricating oil product in the future.
First, the handcuff method
This is the simplest and most direct method; the specific method is that we take a proper amount of lubricant and slowly grind the touch between the thumb and the index finger. Generally speaking,
If the quality of the lubricant is good, it gives us the feeling that it is very smooth and almost no feeling of matte; but for some inferior lubricants.
Say, when we try to figure out, there will be obvious friction and sand grain feeling, which means that the lubricant has more impurities and should be replaced with new oil.
Second, observe the flow method
This method is based on the naked eye, the specific method is to use two measuring cups, one full of lubricating oil, the other empty on the table, to 30 cm
The distance is poured into the empty cup. If the oil quality of the lubricating oil is good, the flow rate and flow rate of the oil are uniform, and vice versa, the oil quality is poor.
Third, the filter paper dripping method
Take a clean and non-contaminating white filter paper, take a few drops of lubricating oil on the filter paper, and wait for the lubricating oil to leak, pay attention to the observation, if there is black powder residue
The feeling of fine sand is felt by hand, which means that the oil quality of this lubricating oil is not good. The high-quality lubricating oil generally does not have powder residue on the filter paper, and it is filtered.
The oil on the paper is yellow instead of black.