Bobbin thread tension – SINGER 221K Featherweight User Manual
Page 23
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21
BOBBIN THREAD TENSION
Bobbin
thread
tension
too tight—correct by turn
ing
screw
counterclock
wise.
Bobbin
thread
tension
too loose—correct by turn
ing screw clockwise.
A perfectly locked stitch results with upper and lower tensions balanced
so that needle and bobbin threads are drawn equally into fabric.
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