Upper Threading - Singer 645 Owner's Manual

1. Turn the hand wheel
toward
you to raise the take-up lever
to its highest position.
2. Place a spool of thread on the
spool pin.
3. Lead the thread through the
top thread guides.
4. Down and between the tension
discs, from right to left.
5. Draw the thread up through the
check-spring and with a slight
tug into the hook.
6. Up and through the eye of take-
up lever from right to left.
7. Lead thread down through the
thread guide at the bottom of
the threading slot, then, through
the needle bar thread guide from
the back.
8. Thread
the needle
FROM
FRONT TO BACK, drawing it
through about 3 or 4 inches.
Hold the end of the upper
thread loosely and
turn the
hand wheel toward you until
the needle goes all the way
down and comes back up. A
thread loop will form over the
upper thread which then can be
pulled out straight. Place both
thread ends under presser foot
and draw toward the back of
the machine, leaving both
threds three or four inches
long.
In
case
of twin needle
sewing,
place
two spools of thread,
matching or contrasting in color,
one on each spool pin, lead both
threads through top thread guides,
bring threads.down and pass one
thread between the back discs and
the other between the front discs,
then treat both thread as one until
threading
each thread
through
each needle eye of twin needle.
UPPER THREADING
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