Originally Posted by
miriam
The finger points another direction as Cathy said but there is a slot in the bobbin case that can be long or short for the 15s. If you get the wrong one you will know - needles break when they hit metal.... I'm not exactly sure why some machines have the long slot but I'm thinking it has to do with whether or not the bobbin faces you or the side.
You only need to worry about it if you have a front loading machine. Short slot=straight stitch machine, long slot=zigzag machine. That's because with a front loader the whole bobbin assembly is stationary so the slot has to be wide enough for the needle to come down in zig and in zag.
With an end loading machine that zigzags, the whole bobbin assembly moves back and forth with the needle so it's always in position with the needle; the needle always comes to the bobbin at the same place so a long slot isn't necessary.
Cari