Hello Dash,thank you for your quick reply.the bearings are good,no noise came from them with the rotor removed and turning the drum by hand.noise came from rotor rubbing on the stator every turn,so it was very noisy at spinning time.I can see there is scratch mark on the permanent magnet pole face.I am hoping if I replace the rotor to eliminate the play on the spline,no more rubbing on the pole faces.I an surprised that the spine is not hard metal.