Operating instructions

4.2 Recommended yarn
Needle system: B27
Recommended
needle thickness: Nm 80 for very thin sewing material
Nm 90 for thin sewing material
Nm 100 for medium weight sewing material
High sewing safety and good sewability are achieved with the
following covering
threads:
–
Double polyester continuous polyester core s pun
(e.g. Epic Poly-Poly, Rasant x, Saba C , ...)
–
Double polyester continuous cotton core spun
(e.g. Frikka, Koban, Rasant, ...)
In case these yar ns cannot be procured, even polyester fibers or
cotton yar n specified in the table can be sewed up.
Double core threads are often offered by yar n producers under the
same designation as triple polyester fibre yar n (3-cyl. spun). This
results in doubts in respect of twist and yar n thickness.
In case of doubt, untwist the yar n and check as to whether it is double
or triple twisted.
The Label No. 120 on the yar n roll of a core thread e.g. corresponds to
the yar n thickness Nm 80/2 (see table values in brackets).
In case of monofil threads, needle threads a nd looper threads of the
same thickness can be used. In doing so, the best results are
achieved with soft and elastic threads (software) with thread thickness
of 130 Denier.
Recommended yar n thicknesses:
Needle Thickn. Core thread Core thread
Nm
Needle thread Looper thread Needle thread Looper thread
Polyester- Polyester- Polyester- Cotton
continuous core spun continuous core spun
Label No. Label No. Label No. Label No.
80
90 120 (Nm 80/2) 120 (Nm 80/2) 120 (Nm 80/2) 120 (Nm 80/2)
100 100 (Nm 65/2) 100 (Nm 65/2) 100 (Nm 65/2) 100 (Nm 65/2)
Needle Thickn. Polyester fibre yar n Cotton yar n
Nm (3cyl.-spun)
Needle thread Looper thread Needle thread Looper thread
80 Nm 120/3 Nm 120/3 Ne
B
60/3-80/3 Ne
B
60/3-80/3
90 Nm 80/3-120/3 Nm 80/3-120/3 Ne
B
50/3-70/3 Ne
B
50/3-70/3
100 Nm 70/3-100/3 Nm 70/3-100/3 Ne
B
40/3-60/3 Ne
B
40/3-60/3
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