Bernina 900 electronic - The Needle

The needle
The needle is one of the most important BERNINA uses the "705 B,, needle system
elements of the
sewing rnachine.
It pier- without fluting
(Singer designation:
15 xl1
ces the fabric
and forms
a loop
which is on
all domestic
sewing machines
with
caught
by the
shuttle and is
joined with
CB-shuttle
hook.
the lower
thread
The loop is
formed after
The metric
system
has been
in unse since
the needle has
pierced the
fabric and has
1947 for needle
thickness
designation.
A
reached
its lowest point.
The needle lifts
needle thickness
of 100 means
that the
slightly during the so-called
loop ift needle stem
is 1 mm thick.
The
tightly drawn
thread
which lies
in the (A
No.80 needle
- 0,8 mm:)
long and short grooves
on the front and
The needle must be
firmly secured by the
rear side
of the
needle, respectively,
is knurled
screw
on the needle
holder.
caught above the short groove between
the needle
stem and the material, When IMPORTANT:
Always use a No 80 needle
the needle moves upward,
the thread feed for all adjustrnents unless otherwise sta-
is retarded
due to the
friction of
the ted,
Check the
needle prior
to every
ad-
fabric and thereby
a loop. comming from justment of the sewing machine. It must
the
needle eye, is formed on the rear side
always be straight.
of the needle This loop is caught by the
shuttle
tip, widened, and is guided
around
the lower thread supply. The important
features
of the sewing
needle are:
a) shank
for securing
the needle
in the
needle bar
b) stem with
a short and long groove
c) needle eye
d) needle point
e) needle
length
b
d Fig 5