We don’t want more damage

So there is a area on my furnace that is called a squirrel cage, but i did some researching late at night because my furnace was making an exhausting thumping sound. I have deduced that the squirrel cage is the reason for my noise; The motor could sound almost savor it is bouncing if the squirrel cage bearings are out; Online said to put a sturdy piece of styrofoam under the cage to stop it from moving… First, I did not savor that the service was not to actual service the system, but just adding something around the beach house to stop it, and next, I did not savor that I had no method what bearings or a squirrel cage was… A squirrel cage is the type of fan that can be found in a furnace. It moves the air through the furnace as well as this is what heats your home. The reason it has such a stupid name is that the fan looks savor a hamster cage. Apparently it is a lot of little fans truly working together to transport the air in as well as out of the furnace, and most people just refer to it as a blower. The bearings or pieces holding it all together can prematurely wear out as well as allow it to bounce around, however how the bearings can wear out is the blower is unbalanced or the furnace has overheated to the point that the bearings could just not take it anymore, either way, getting new bearings does not sound so fancy. I would way rather do this than add foam under a piece in my furnace.