Bernina 440 QE User Manual download pdf (Page 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

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.

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

Guidelines Needle No.

lightweight fabrics:

thin thread

(darning thread, embroidery thread) 70–75

mediumweight fabrics:

normal sewing thread 80–90

heavyweight fabrics:

sewing thread

(quilting thread, topstitching thread) 100, 110, 120

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.

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.

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.

032907.52.04_1103_a430_a440_a450_EN

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 85 86

Comments to this Manuals

No comments

Bernina 440 QE User Manual Page 18

Comments to this Manuals

Related products and manuals for Sewing machines Bernina 440 QE