Originally Posted by
Dolphyngyrl
TOL machines use the same as the cheaper machines, my expensive brother and cheap walmart brother use the same bobbins, case and size. I prefer drop in, its easier to me, my older brother used to be front load but tension was the same to me anyway
I have a series 8 - Bernina 830 and it has the larger bobbin that holds 40% more thread than the regular bobbins. My 7570 and 4170 pfaffs use the regular size bobbins and I have no problem with them. I think it is a personal preference. When I embroider with the 2170, I use the pre-wound bobbins. They are wound much more tightly than the machine can do it and are no more expensive than the "wind it yourself" bobbins.