A. Style “L” Smart Bobbins
NOTE: You may use metal, aluminum, magnetic core bobbins and even pre-wound bobbins with your machine, as
long as they are this style. Refer to the photos below for examples of “Style L” bobbins.
Metal bobbins will normally require looser bobbin tension to compensate for their weight. Aluminum and pre-
wound bobbins are similar in weight. Some pre-wound bobbins have cardboard sides; others have no sides and
contain a magnet on the core that substitutes for the bobbin brake or check spring (see photos below for more
information about the brake spring).
Inserting “L” Bobbin into Bobbin Case
Place the bobbins into the bobbin case so that the bobbin rotates clockwise when it is inside of the bobbin case.
Guide the thread tail through the slot on the bobbin case (Photo C), and then under the flat tension finger on the
outside of the case (Photo D).
(Magnetic
Core)
Cardboard Sides
Tension Adjustment Screw
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