Important Facts About Thread And Needle; Thread; Needle, Thread And Fabric; Needle/Thread Combination - Bernina Aurora 440QE User Manual

18 Important facts about thread and needles

Important facts about thread and needle

With the right combination of thread and needle optimum sewing results are achieved.
The following are the guidelines: replace needle when starting a new sewing project.

Thread

The thread is chosen according to use. For a perfect sewing
result, thread and material quality play an important role. It is
recommended to use quality brand threads.
Cotton thread
• cotton threads are particularly suitable for cotton fabrics
• mercerized cotton threads have a slight sheen
Polyester thread
• polyester thread is suitable for practically all sewing needs
• it has a high tensile strength and is particularly colorfast
• polyester thread is more flexible and is recommended where a
strong and elastic seam is required
Guidelines
lightweight fabrics:
thin thread
(darning thread, embroidery thread)
mediumweight fabrics:
normal sewing thread
heavyweight fabrics:
sewing thread
(quilting thread, topstitching thread)

Needle/thread combination

In order to check the needle/thread compatibility, the correct size thread must correspond with the correct size needle.
Correct needle/thread
combination
When sewing, the thread should travel
smoothly down the long groove on the
front of the needle.

Needle, thread and fabric

The correct needle size depends on the selected thread and
fabric. Fabric type and structure determine which thread weight,
needle size and needle tip should be used.
Needle summary
BERNINA requires needle system 130/705 H. This system
number refers to shank shape as well as to length and form of the
needle point.
Checking the needle condition
The needle condition should be checked and the needle replaced
regularly. A defective needle not only damages the fabric but also
the sewing computer.
Needle No.
70–75
80–90
100, 110, 120
Too thin thread or too thick needle
The sewing thread has too much play in
the groove. This could lead to skipped
stitches and damage to the thread.
032907.52.04_1103_a430_a440_a450_EN
130 / 705 H S 70
Shank diameter
= 0.7 mm (needle size)
Needle point
e.g. medium ball point
Needle scarf
Flat shank
Shank length
Too thick thread or too fine needle
The thread rubs on the edges of the
groove and can get jammed. This can
break the thread.