Originally Posted by
Mizkaki
As a general rule, if the machine has a side loaded bobbin it will not take a double needle. If two needles are placed in the needle-bar side by side, the hook will only catch the thread from one needle. The hook has to pass behind both needles to be able to catch the thread loop.
Cathy
Oops, looks like I didn't pay enough attention to the photo.
All of the Kenmore machines I have owned have had front loading bobbins, hence my spurious advice.