Originally Posted by Prism99

That looks like my mother's old Singer. You oil it regularly, don't you? Those old machines have many oiling points both on the top and underneath.

Lots of dealerships have a mechanic on staff who can fix old machines.

I didn't realize it was the bobbin winder you need to fix. On at least one old machine I had, I simply placed my finger on the bobbin winder arm to provide enough pressure for the winding. A lot depends on whether the winder spins or not.