Singer class 251 - Description of Class 251 Sewing Machines

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
Copyright
(D
1955,
by
The
Singer
Manufacturing
Company
3
DESCRIPTION
Machines
of
Class 251
are
high
speed,
single
needle,
lock
stitch
machines
with
a
completely
automatic
lubricating
system.
They
have
a
gear
driven,
lubricated,
rotary
sewing
hook
on
a
horizontal
axis
and
a
drop
feed.
The
rotary
sewing
hook
makes
two
revolutions
for
each
stitch.
The
bed
of
these
machines
is
18-3/
4
inches
long
and
7
inches
wide.
The
space
at
the
right
of
the
needle
is
11
inches.
The
machine
base
and
oil
reservoir
furnished
with
these
machines
will
fit
any
table
cut-out
provided
for
Machines
of
Classes
31-,
96-
and
241-.
A
centrifugal
oil
pump
delivers
oil,
under
pressure,
to
all
the
prin-
cipal
bearings.
Provision
is
also
made
to
automatically
lubricate
all
the
other
bearings
in
the
machine.
The
needle
thread
take-up
lever
is
covered
by
an
oil
guard
to
pre-
vent
splashing
of
excess
oil.
An
oil
flow
window,
in
direct
view
of
the
operator,
indicates
the
circulation
of
oil
inside
the
arm
of
the
machine.
The
machine
pulley
furnished
is
for
a
3/8
inch
V-belt.
It
can
be
used
for
a
5/16
inch
round
belt,
when
desired.
These
machines
are
furnished
with
a
knee
lifter,
which
is
an
in-
tegral
part
of
the
machine
base
and
oil
reservoir.
Machine 251-1
has
a
needle
bar
stroke
of
1-9/64
inches
and
a
presser
bar
lift
of
9/32
inch;
can
sew
a
maximum
of
7
stitches
to
the
inch
and
is
designed
for
sewing
light
weight
fabrics.
Machine
251-2
has
a
needle
bar
stroke
of
1-13/64
inches
and
a
presser
bar
lift
of
5/16
inch;
can
sew
a
maximum
of
5-1
/2
stitches
to
the
inch
on
medium-heavy
to
light weight:j:
fabrics.
Machine
251-3
has
a
needle
bar
stroke
of
1-7/16
inches
and
a
presser
bar
lift
of
3 8
inch;
can
sew
a
maximum
of
5-1
/2
stitches
to
the
inch
on
heavy
to
light weight:j:
fabrics.
This
machine
can
also
be
furnished
with
a
presser
bar
lift
of
7
/16
inch,
enabling
it
to
sew
extra-
heavy
to
light weight!:
material.
·/·For
best
performance
on
light
weight
fabrics,
it
is
recommended
that
Machines
251-2
and
251-3
be
equipped
with
fittings
designed
for
the
particular
operation.