Types of Needles Used in Overlock
Needles of home sewing machines are universal and they are suitable for all home models (in most cases). Needles that are used for sergers, unlike household sewing machines, having differences often.
First, they can have different form of shank a needle.
Second: Needles designed for overlock can have different thickness of shank and its length.
There are other features of the overlock needles. In this post you learn all you need to know about needles that are used for installing in overlock sewing machine.
Sergers may have one or two needles
Overlock sewing machines may have one or two needles. Old models usually have a one needle only.
All modern home overlocker have two needles. If necessary, one needle can be removed or you can just pull out one needle thread. In both cases the serger will work with three threads.
Sergers needles vary in thickness and length
In any overlocker manual is indicated what a type needle can be used for this model a serger. You must strictly observe this requirement and use needles that are recommended by the manufacturer.
You should know that some overlockers have needles having a round shank. Most modern home overlockers have needles with flat side on the shank, like the sewing machines needles.
In addition to it the needles for serger can have different length. It is simple to mesure with a ruler.
And the last difference is that a shank of needle can also have different thickness and length of it. This feature is difficult to determine visually.
Therefore it is necessary to replace a needle of overlock sewing machine which type and size is marked on overlock housing (or is specified in manual).
When is needed to change a serger needle
How you can to determine a moment when you need to remove old needle and set new one? There is easiest sign - during a work a serger produces a thud sound. This means that needle point is blunted. Take a magnifying glass and look at the needle tip.
Serger needle should be changed if periodically appear skipped stitches or thread breaking.
Clamping a new needle must be reliable
After replacing broken needle you need to check tightness of clamping of new needle. It must be reliable. Bad fixed needle can to fall down from slot during sewing. It can damage loopers and other parts of an overlock.
Note that both needles a serger are installed with offset.
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