Originally Posted by PurpleBecca
I think so - any tips?
does the 99k bobbin have holes in it?
The one in the machine is a blank with no holes (I use Bernina's and its years since I used a singer!! - my vinage ones are for looking at!!!)
The bobbin that the 99K uses is a class 66, has the hole in the center;3 holes + 1 little hole on each side. Its slightly domed. Sometimes the older bobbins only have 1 little hole and the one in the center.
The vintage bobbins work best, most of the new bobbins are poorly made and often the hole in the center is too small for the bobbin winder spindle.
Here's a link to what they look like. I'm not reccomending these, only so you know what to look like.
http://www.sewingpartsdirect.com/bob...ck-172222.aspx
Sharon W.