I had that problem off and on, I have a badged Singer -15 clone, it had never been oiled or used. I finally put some grease on the shaft that goes into the motor and other end that comes out of the thing that holds the thing for the belt to go on. That stopped the noise and the thread from breaking. Sorry I don't know the technical names of the parts. Don't know if this will help. I also used the hand wheel and oiled everything that moves until it stopped making noise.