How Disassemble a Thread Tensioner

How disassemble a thread tensioner

You are having problems with thread tension on your sewing machine? Thread tension in stitches is very tight or loose? Sometimes to fix this problem is needed to remove a tensioner and clean it.
Here you will to learn how to fix a tension problems of needle and bobbin thread.

Old sewing machine tensioner

You have tightened a thread with a control tension dial as far as it will go, but the thread is still loose and bunching up ? You have tried many ways to fix this problem but unsuccessfully.
In this case you need try to remove the tensioner with sewing machine body and disassemble it.
Note: Sometimes to fix this problem is enough to clean a tensioner (between discs) from dust, thread scraps etc.
It is easiest to disassemble and clean a tensioner of old sewing machines models.

To remove the tensioner you need first remove a faceplate from front part of sewing machine.

How to remove a thread tensioner

Two details affecting on needle thread tension

Look at this photo. These two arrows indicate details affecting on needle thread tension.
Lift up a presser bar lifter (lever). In this position both tension discs should not push top thread and vice versa.

How to pull out a tension assembly

You rotate tensioner dial but thread tension does not change at all ? In this case need loosen a set screw and pull out the tension assembly. To loosen the screw it has to be rotated to left.

Thread tension assembly

Take off the thread tension assembly. Grip it with fingers and pull towards you.

Parts of thread tensioner of old sewing machine

Parts of thread tensioner of old sewing machine

The first thing what to do you is marking assembly sequence. Some models of sewing machines have some features. If you have no manual with scheme you must be sure of how it goes back together.
Clean machine area of tensioner first and all parts in order they go back on.

How to adjust a bobbin thread tension

How to adjust a bobbin thread tension

Check tension of bobbin thread. When it is very weak or nery strong learn here how to change it.
To increase the tension a bobbin thread you need turn this smll screw clockwise and vice versa.
Sew a few probe stitches. If you still have thread bunching up on bottom side of fabric you need to check other parameters of working the sewing machine.
Inspect sewing machine needle with a magnifying glass first. If needle tip is blunt remove it away and set a new needle.
Make sure that thread are insert between the tension discs correct.
Sometimes is needed to change type of sewing thread, etc.

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