Oilite bearings in Electric floor fan - continued
As mentioned in the General MetalWork Forum I suffered a bearing failure in my floor fan.
Complete disassembly showed it to be, not a oilite bearing, but a steel one and a semi spherical shaped one to boot.
There was brown tarry crud present which I surmise was formed by cockatiel dust and light oil.
Our local bearing emporium did not keep oilite bearing in that ID or configuration.
Long story short, I decided to fit a ball race and duly spun up and adapter in the lathe.
I had to fiddle about a few times with assembly and disassembly to get what I thought was the right end play.
Now the strange part.I assemble the motor and was able spin the rotor freely and had about a mil and a half of end play.Switched the power on and it buzzed and locked up. Turn the power off and it was back to spinning freely. Does the rotor have to be in a precise axial location so the induced field can work properly?
Can any one suggest what I might have done to cause this situation?
Grahame