From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
THREAD
On Machines of Class 331 K,
use only left twist
thread
in
the needle. Either right
or
left twist
thread
can
be
used
in
the bobbin.
To
determine the
thread
twist, hold the
thread
as
shown
in
Fig.
6.
Then twirl the
thread
over
toward you.
If
the strands
of
the
thread
wind tighter, the
thread
is
left twist, if the strands unwind
or
separate,
the
thread
is
right twist. Rough
or
uneven
thread,
or
thread
which
passes with difficulty through the
eye
of
the needle,
will
interfere with the successful use
of
the machine.
NEEDLES
The
needle
you select
will
have a very direct effect
on the quality, strength
and
appearance
of
the stitch
produced
by
the machine.
In
selecting a
needle
size
...
the
eye
must
be
large
enough to allow the
thread
you
are
using to
pass
through freely without binding
or
chafing. A simple
test
is
to
thread
a short length
of
thread
through the
eye
of
the
needle
selected; hold the
thread
taut
in
a
vertical position .and twirl the
needle
about
the
thread.
If
the size
is
correct, the
needle
should slip down the
thread
easily.
Needles for this machine
are
of
Catalog
#2055
(16
x 87)
in
Sizes 8 to 14, 16 to 19 and
21
to 25.
Orders for needles
must
specify the Quantity
required, the Size number, also the Catalog number.
For example:
"100
Size 16, Catalog #2055
(16
x 87) Needles"
For best results always use
SINGER
needles.
TO
SET
THE
NEEDLE
Turn
the machine pulley
over
toward you
until
the
needle
bar
moves to its highest point.
After loosening
needle
clamping screw, remove old
needle
and
insert new
needle
UP
into
needle
bar
AS
FAR
AS
IT
WILL
GO,
as
instructed
in
Fig.
7.
The single continuous groove
of
the
needle
MUST
face
away
from the shuttle point (toward the left end
of
the machine,
as
shown
in
Fig. 7) with
eye
of
needle
directly
in
line with arm
of
machine.
Securely tighten
needle
clamping screw.
5
HOLD
THIS
END
Fig.
6.
How
to Determine the Twist
VE
TO
HEST
POINT
T
NEEDLE
UP
AR
AS
POSSIBLE
TIGHTEN
SCREW
Fig.
7.
Setting the Needle
COMMON
CAUSES
OF STITCHING
TROUBLES
Check needles often to make sure these defects
are
not present
...
• Wrong needle for
thread
and
material
in
use.
• Bent needle, clogged needle eye,
or
dirty
needle
grooves may cause skipped stitches.
• Hook or
bur~
on
needle point may cause picking
or
fraying
of
the material.
• Incorrect setting
of
needle.
To Next Page
Loading...
