The self-lubricating mystery of powder metallurgy oil containing bearings

Have you ever thought about why the electric fan at home can run quietly for several years without needing to be serviced? Or is the food mixer both smooth and almost maintenance free to use? The answer is likely hidden in an inconspicuous yet incredibly intelligent small component - powder metallurgy oil bearing.

This type of bearing is not a regular metal sleeve. It is filled with micrometer sized pores inside, like a "breathing sponge" and countless miniature oil storage tanks. When the equipment generates heat during operation, the material expands due to heat, and the lubricating oil in the pores is squeezed out to lubricate the friction surface; After shutting down and cooling down, it automatically "sucks back" excess oil, completing an intelligent cycle. The entire process does not require manual intervention, truly achieving self-sufficient lubrication with "thermal expansion and oil release, cold contraction and suction".

Compared to traditional copper sleeves that require regular refueling, cleaning of oil stains, and even frequent replacement, oil lubricated bearings are simply a "lazy blessing". It not only eliminates tedious maintenance, but also significantly reduces noise and failure rates, making it particularly suitable for scenarios that require quietness and reliability.

This type of "smart bearing" has already quietly penetrated into our daily lives: from hair dryers and coffee makers to printers and copiers, to small agricultural and light industrial machinery, it can be found everywhere. Quiet, worry free, and low-cost - this is precisely why it is widely popular in the fields of household appliances and light industry.

So the question is: What appliances in your home may be silently enjoying this "never give up" black technology? Why not turn on the old fan and take a look? Maybe there's a tiny lubrication miracle hidden inside!