Beisler 739-23-1 Manual - Manual (Page 8)

2. Operation of the sewing machine head
2.1 Recommended threads
The following core spun threads cater for high quality seams and
interruption-free processing:
Double polyester endless polyester spun (e.g. Epic Poly-Poly, Rasant
x, Saba C, etc. )
double polyester endless cotton spun (e.g. Frikka, Koban, Rasant,
etc.)
If these products are not available, use the cotton and polyester
threads listed in the table.
Double core spun threads are in many cases offered by yarn
manufacturers under the same trade name as triple polyester fibre
threads (3-cylinder spun). This may lead to a certain confusion
regarding twisting and thread thickness.
If in doubt, open the thread and check whether it is double or triple
spun.
Number 120 on the label of a yarn reel of a core spun thread
corresponds for example to thickness Nm 80/2 (see values shown in
brackets in the table).
For monofile threads, needle thread and bobbin thread may be of the
same thickness. The best results are achieved, if the threads are soft
and elastic (software) and with a thickness of 139 Denier.
Recommended thread thickness
Needle strength Needle threadNeedle thread Position of Bobbin thread Bobbin thread
Nm tension thread regulator tensions
[g] [g]
100 cotton 60 - 100 3,5 cotton 30 - 40
NeB 50/2 70 - 100 NeB 50/2
Poly-Poly Poly-Poly
Nm 65/2 Nm 65/2
(Prod. 100) (Prod. 100)
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