SINGER 319K - Manual (Page 41)

39
BOBBIN THREAD TENSION (continued)
Balanced Tensions
TO SET BOBBIN THREAD TENSION
Wind bobbin with a 50 yard spool of size "A”
silk thread.
Fig. 62 . Bobbin Thread
Tension Too Tight
x\
\
Thread bobbin case
and adjust tension so
that weight of bobbin
case with a bobbin of
50 yards of "A” silk
will cause the case to
slide slowly
5
when held
suspended by the
thread. See Fig. 63.
For correct tension,
its downward move­
ment should be very
slow.
Fig. 63