Originally Posted by
Dolphyngyrl
I have to disagree quiltedsunshine my plastic bobbin case in my brother has sewed through 10 layers of denim flawlessly without jamming so I don't think that a plastic bobbin has anything to do with the quality of sewing
All of my machines since 1972 use plastic bobbins, top load. Never had an issue. I found that "experience" interesting. Sounds like a maintenance or threading issue.
Sandy