Why Does My Sewing Machine Bobbin Keep Jamming

Why Does My Sewing Machine Bobbin Keep Jamming?

If your sewing machine’s bobbin keeps jamming, there are a few possible reasons why. The most common culprit is that the bobbin is not inserted correctly. Another possibility is that the bobbin case is dirty or damaged. Also, the tension on the bobbin could be too tight or too loose.

In this article, we’ll discuss common reasons your sewing machine’s bobbin keeps jamming. We’ll also give you tips on fixing the problem so you can get back to sewing without frustration.

11 Possible Reasons for Bobbin Jamming Issues

There can be any reason for your sewing machine’s bobbin to jam. But, we listed 11 common reasons that happen frequently.

1.    Thread Tension Is Set Incorrectly

When thread tension isn’t set correctly, it can cause the bobbin thread to jam. The tension on the bobbin should be just right – not too tight and not too loose. If the tension is too tight, the bobbin thread will not be able to flow freely and will get tangled. If the tension is too loose, the bobbin thread will not be pulled up correctly and become tangled.

To resolve this, change the tension until both sides of the cloth appear equal.

2.    Bobbin Is Inserted Incorrectly

If your bobbin is inserted incorrectly, it can cause jams. Be sure to check your manual to see how to insert the bobbin correctly. Once you have it correctly inserted, re-thread the machine and try again.

3.    Bobbin Case Is Dirty

If your bobbin case is dirty, it can cause the bobbin to jam. To clean the bobbin case, remove it and use a soft cloth to wipe away any dirt or debris. Be sure to re-assemble the bobbin case correctly before sewing again.

4.    Wrong Size Bobbin

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If you are using the wrong size bobbin, it can also cause jams. Check your manual to see what size bobbin is recommended for your machine.

5.    Needle Is Damaged Or Bent

A damaged or bent needle can also cause jams. If this may be the problem, replace the needle and try again.

6.    Feed Dogs Are Damaged

The feed dogs are the teeth that move the fabric through the machine. If they are damaged, they will not be able to grab the fabric and move it correctly. This can cause jams.

To fix this, you will need to have your machine serviced.

7.    Machine Is Not Oiled Properly

If your machine is not oiled properly, it can cause jams. Be sure to check your manual to see how often to oil your machine and what type of oil to use.

8.    Fabric Is Too Thick

If you are trying to sew through too many layers of fabric or thick fabric, it can cause jams.

How to fix this, you will need to use a thinner needle or a different type of foot.

9.    Stitches Are Set Too Tight

If your stitches are set too tight, it can cause the fabric to bunch up and jam. To fix this, simply loosen the stitch width until the fabric feeds through smoothly.

10. Machine Is Not Threaded Correctly

If your machine is not threaded correctly, it can cause jams. Be sure to check your manual for the correct way to thread your machine. Once you have it threaded correctly, re-thread the machine and try again.

11. Stitches That Have Been Skipped

If you are sewing and the stitches start to skip, it could be that the needle is not in far enough.

You can fix this by simply turning the handwheel towards you until the needle is in the down position. Then, push the needle up into the fabric and continue sewing.

These frequently happening reasons can be avoided by taking proper care of your sewing machine. So do care and enjoy a stress-free swing.

How Do I Stop My Bobbin from Jamming?

Now you already have enough knowledge about the bobbin jamming issue. So, let’s see how you can prevent it from happening again.

Check the Thread Tension and Bobbin Case Regularly

The first step is to check your tension. If the upper thread tension is too loose, the bobbin thread will show on the right side of the fabric. If the upper thread tension is too tight, the bobbin thread will show on the wrong side of the fabric or not at all. To solve this, simply adjust your tension until the stitches look even on both sides of the fabric. You should also check your bobbin case regularly for any dirt or debris.

Use the Correct Size Needle and Foot

Use the correct size needle and foot for your project to prevent bobbin jamming. Always use that needle specified for the type of fabric you’re sewing. For example, a ballpoint needle is best for Knit fabric, but if you sew it with a sharp needle, it will cause jamming. So, it is best to use the size recommended for the fabric.

Use the Correct Type Of Bobbin

Be sure to use the correct type of bobbin for your machine. There are two types of bobbins, standard, and drop-in. Standard bobbins must be wound before they can be used, while drop-in bobbins can be inserted into the machine without winding. If you are unsure which type of bobbin to use, check your manual or ask a salesperson at your local fabric store.

Don’t Overload Your Machine

Don’t try to sew too many layers of fabric at once. This will cause your machine to work harder and can lead to jams. If you’re working with thick fabric, take it slow and be patient. Sew a few stitches, then stop and check your work before sewing any further.

Keep Your Machine Clean

To prevent bobbin jamming, you should also keep your machine clean. This means regularly cleaning your Bobbin Case, Hook Assembly, and Needle Plate. You should also oil your machine according to the manufacturer’s instructions. A well-maintained machine is less likely to jam.

Be Careful With The Thread

Be careful not to damage the thread while you’re sewing. Don’t let the thread get tangled or knotted. Also, be sure to use a high-quality thread that is compatible with your machine. A cheap thread is more likely to break or cause jams.

Have Your Machine Serviced Regularly

Finally, one of the best ways to prevent jams is to have your machine serviced regularly. A qualified technician will be able to spot any potential problems and fix them before they cause a jam.

Doing all these things will help you to solve the bobbin jamming problem. So, next time you start sewing, be aware of all these things and enjoy problem-free sewing.

Frequently Asked Questions

Why does my bottom bobbin keep getting jammed?

If your bottom bobbin keeps getting jammed, it is likely due to a problem with the tension. The tension should be checked and adjusted according to the manufacturer’s instructions.

Why does my bottom thread keep jamming?

The problem occurs because of tension and needle if tension is too tight or loose, thread tangled while sewing. It’s better to keep tension in the default setting or change it manually to the middle. If tension is ok, then the needle will be the cause behind thread jamming. Use the correct size needle to solve this problem.

Why is my top thread getting tangled in the bobbin?

If you made any mistake on upper threading, your top thread gets tangled in the bobbin. The best solution is to cut the thread and start re-threading from the beginning.

How do I know if my bobbin tension is correct?

If your bobbin tension is correct, the thread will unwind from the bobbin smoothly and evenly. The thread will be loopy and messy if the tension is too loose. If the tension is too tight, the thread will break easily.

What tension should my sewing machine be on?

The tension on your sewing machine should be set to the middle position or “4” on most machines. You can adjust the tension higher or lower if needed, but the middle position is usually a good starting point.

Final Words

In the end, we would like to say that the problem of bobbin jamming on a sewing machine is very common. There can be many reasons for this problem. But, if you follow the above tips, this problem will surely be solved. I hope this article will be helpful for you. Please feel free to ask in the comment section below if you have any queries.

Sifat Muntasir

Sifat Muntasir


I’m Sifat. I work as a lecturer in the Department of Textile Engineering at Port City International University. I’m fascinated by the latest developments in the world of fashion and clothing, so I spend most of my time writing about them on this blog.

I also enjoy singing and playing games on the internet in my free time – though I’m not very good at either!

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