Question about greasing!
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I have a question for everyone: The bearing of a low-speed shaft is mounted vertically, with both the grease filling hole and the oil drainage hole located on the same horizontal plane. I want to know what the internal structure of the oil hole is like Are the oil filling hole and the oil drainage hole of the same size? Where does the oil filling hole lead to within the bearing? To which part of the bearing does the oil drain hole lead? Why is it designed this way? Generally, when butter is added through the oil filling hole to a certain amount, it will be discharged from the oil drainage hole (as a way of replacing the grease). What will happen if butter is added through the oil drainage hole? Will too much oil also be discharged through the oil filling hole? Are there any downsides?
I wonder if there are any pictures available for reference?