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THE NEEDLE
The needle is one of the most important items of sewing equipment. Its function is to
pierce the material and to take the upper thread to the hook for linking with the lower
thread and to form the loop for acceptance by the hook.
The loop is formed after the needle has pierced the material and reached its lowest point.
The thread is drawn tight and lies in the long groove at the front. At the rear it lies in the
short groove and higher up between the needle stem and the hole pierced in the fabric. If
the needle rises slightly, the so-called loop lift, a loop is produced at the eye of the needle
on the short groove side, which the tip of the hook can enter, as a result of the friction
between the work and the needle stem where the thread ist retarded.
Basically, the sewing machine needle has thefollowingfeatures:
a) theplungerfor securing the needle in the needle bar
b) the stem with a long groove for guiding the thread and forming
the loop
c) the scarf
d) t h e eye of the needle
e) the point of the needle
f
)
the needle length
BERNINA used the 130/705 H needle system with scarffor the
Model 940. (CI. 9 5 0 = 2 8 7
WH).
The needlesize is measured in millimetres. Needle size ((1 00))
means a needle stem thickness= 1 mm (Needle mm) or Nm=
0,8 mm dia.
The needle must be firmly secured with the knurled screw on the
needle holder. Tighten screw with special screw-driver.
IMPORTANT: Unless indicated otherwise, always use an ((Nm
80)) needle for all adjustments. Check the needle before every
adjustment to the machine. It must be absolutely straight.
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