Needle Differences In 111W's

[art23]

I was looking through the singer 111w's instructions manual and saw that the needle system or catalogue is different in the 154 and the 155. The 155 is 135×17 and uses up too needle size 24. The154 is 126×11 and uses needle sizes such as 25 and 27. So does this mean that I can put thicker thread on the 154. Can someone explain the difference of 135×17 and 126×11 is one longer or thicker than the other? I googled the #s and got nothing.I will try to continue my research on this topic but any help is very very much appreciated.

[Cobra Steve]

Hi art23. The correct needle system for the 111W is the 135 system. Either 135X17 for upholstery/canvas type materials, or 135X16 for leather. The 126X11 is a longer needle but you cannot use a heavier thread. There is not enough clearance in the hook unless you modify the plate and basket. 138 thread is the largest thread that should be used on the 111W. Thanks, Steve

[art23]

Thanx Steve.