The
number before the hyphen or letter designates the Class
to which the machine belongs, and the number after,
the
Variety
of
the
machine
in
its
Class.
When
supplies for a machine
are
to be
ordered
and
there
is any uncertainty as to the correct numbers of needles or parts,
the Class
and
Variety
numbers of
the
machine, as shown on the
number plate, should be given to ensure a correct understanding
of
the
order.
THREAD
Fine
thread should
always
be used.
We
recommend Nos.
120
to
150
in
cotton
thread.
SPEED
The
maximum speed recommended for Machine No.
72wl9
is
1300
stitches
per
minute.
Run
the
machine
somewhat
slower
than this at first and after the parts have
become
thoroughly
glazed by their action, increase
the
speed to the maximum stated.
NEEDLES
Needles
for
Machine
No.
72wl9 are of
Class
and Variety
130x3
(usually
of
sizes
10,
12'and
14).
The
needle which is best adapted for the work
that
the
machineis fitted to do is set in the machine at the factory.
The size number of the needle is marked upon its shank.
The
Sizes.
The
size
to be
used
should
be determined by
the size of the thread
which
must pass
freely
through the
eye.
If
rough
or
uneven
thread is
used,
or if it
passes
with
difficulty
through
the
eye of
the
needle,
the
successful use of
the
machine
will
be
seriously
interfered
with.
Orders for
needles
must
specify
the quantity required, the
size,
also the classand variety
numbers,
separated by x.
The following are details of an intelligible order:
'TOO
No.
12—130x3
Needles."
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