SPEED
___
MAXIMUM
- SPEEDt=
Speed
-recommenelecl
MACHINE
246K42
46K43
246K45
(Stitches
per
for Long Runs
or
while
minute)
sewing
long stitches
6000
6000
5500
5500
5500
5000
tMaximum
efficient
speed
is
dependent
upon
the
ability
of
the
operator,
the
nature
of
the
operation
and
the type
of
material
being sewn.
It
is
advisable
to
operate
these
machines
at
more
moderate
speeds
the
first
few
days,
after
which
they
can
be
run
at
top speed.
When
the
machine
is
in
operation,
top
of
ma-
chine pulley must
always
turn over
away
from
operator.
NEEDLES
AND
THREAD
Needles
are
of curved
blade,Catalogue#1265
(151
x
7)
regular,
in
sizes 9 to
12,
14, 16,
18,
19
and
21.
Needles
of
Catalogue#1263
(151 x 3)
with
tapered
blade,
in
sizes 5, 6, 7, 9
and
11
are
available.
Selection of
needles
can
make
a
great
differ-
ence
in
the
ease
and
quality
of
the work.
It
is
im-
portant
that
each
needle
be
just right for machine,
thread
and
work being
done.
Choose
your
needle
carefully. The correct size
will permit
thread
to
pass
freely through
needle
eye;
avoiding
strain
and
breakage
of
thread.
twist or left twist
thread
may
be
If
trouble
occurs during sewing:
Inspect needle point. A hook or burr
may
cause
poor stitching
or
some materials
may
be
cut
when
short stitches
are
used.
Check
curvature
of
each
needle,
as
instructed
below. Unless
the
needle
has
the correct
curva-
ture, it
may
cause
skipping
of
stitches.
Orders for needles must specify the
Quantity
required, the Size number, also the
Catalogue
number
...
For
exam
pie
...
"100
Size
9,
Catalogue#1265 (
151
x
7)
Needles."
The best stitching results will
be
obtained
when
using needles sold by Singer Sewing
Machine
Company.
CURVATURE
OF
NEEDLE
BLADE
(Gauge
164588, for
needles
of Sizes 7
to
16
only)
Fig.
9.
Checking Needle Curvature
7
Before
making
any
stitching
adiustments,
the
curvature
of
each
needle
blade
should be
checked
in
the
following
manner:
Using
Gauge
164588,
shown
in
Fig.
9,
insert
shank
of
needle, with its flat
side
up,
in
the
groove
A.
Push
the
needle
along
the
groove
as
far
as
it
will
go
against
stop
B.
Tighten clamping
screw
C.
Swing the indicator
D,
slowly to
and
fro,
along
the
curve
of
the
needle
blade,
observing
the
dis-
tance
between
the needle
blade
and
the tip
of
the indicator.
The tip
of
the
indicator should just
make
con-
tact
at
the
needle
eye
and
should clear
needle
blade,
at
upper
end
of
curve,
by
approximately
.005
to
.006
inch. Use feeler
gauge.
Reied
any
needle
that
cannot
pass
this test.
From the library of: Superior Sewing Machine & Supply LLC
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