Singer 201P - Bobbin Thread Tension; Adjusting Bobbin Tension

TO REGULATE THE BOBBIN THREAD TENSION
Set needle thread tension at ‘‘4’’, as
shown in Figs. 25 and 26.
The tension on bobbin thread 1s reg-
ulated by the screw of the bobbin case
tension spring. Fig. 25 shows the
adjustment required when the bobbin
thread tension 1s too loose.
When adjusting bobbin tension, a
slight turn of the screw 1s all that 1s
needed to make a fine adjustment.