Thanks Joe for posting about the bobbin washers. My Singer 15-91 had a bit of chattering. The bobbin hook assembly was fine. I tried your homemade bobbin washer solution. Mine fits in snug against the bobbin case so that it doesn't spin. No more chattering!

Pennycandy,

You're welcome. I'm going to be making a few more of them to try in other machines that use the Class 15 bobbins. I'm curious if they'll work on all the machines or just some.

Joe