Why Is My Bobbin Not Winding Evenly? (2023)

Why Is My Bobbin Not Winding Evenly?

Sewing enthusiasts know that uneven bobbin winding can quickly damage creativity and productivity. Instead of enjoying your craft, you are frustrated by the machine’s performance.

If you’re experiencing this issue, you’re not alone. It’s a common problem with several causes, from dirty bobbin cases to incorrect tension settings.

In this blog post, we’ll explore why your bobbin may not be winding evenly and provide practical solutions to fix the problem.

Whether you’re a beginner or an experienced sewer, these tips will help you get your machine back in working order and back to creating beautiful projects.

So, let’s dive in and troubleshoot the issue together!

What is a Bobbin?

Before we delve into why your bobbin is not winding evenly, let’s first understand what a bobbin is.

A bobbin is a small spool used to hold the thread on the underside of your fabric while sewing.

It is an essential part of your sewing machine that helps create a tight and secure stitch.

Why Is My Bobbin Not Winding Evenly? Reasons

There are several reasons why your bobbin is not winding evenly. Here are some of the most common ones:

Tension Issues

One of the most common reasons for uneven bobbin winding is tension issues.

If the tension on your machine is too loose or too tight, it can cause the thread to either bunch up or not wind tightly around the bobbin.

You can adjust your machine’s tension using the tension dial on the machine’s front.

Incorrect Bobbin Size

Using the wrong size bobbin can also cause uneven winding. It’s important to check your machine’s manual to ensure that you are using the correct size bobbin for your machine.

sewing machine bobbin

Using the wrong size can cause the thread to not wind evenly around the bobbin, leading to later stitching issues.

Dirty Bobbin Case

A dirty bobbin case can also cause uneven winding.

Dust, lint, and other debris can build up in the bobbin case, causing the bobbin to not sit properly and wind unevenly. It’s important to clean your bobbin case regularly to avoid this issue.

Thread Tension

In addition to machine tension issues, the tension of the thread itself can also cause uneven winding.

If the tension of the thread is too loose, it can cause the thread to bunch up on the bobbin, resulting in the uneven winding.

Worn Out Bobbin

If you’ve been using the same bobbin for a while, it may be time to replace it.

Over time, bobbins can wear out and become misshapen, which can cause uneven winding. It’s important to replace your bobbins regularly to avoid this issue.

How to Fix Uneven Bobbin Winding

Now that you know why your bobbin is not winding evenly, let’s explore how you can fix it. Here are some steps you can take:

Adjust Tension

If you suspect that tension is causing your bobbin to wind unevenly, you can try adjusting the tension on your machine.

Start by loosening the tension and winding a few stitches onto the bobbin. Then, check to see if the winding is more even. Continue adjusting the tension until the bobbin is winding evenly.

Use the Correct Bobbin Size

If you’re using the wrong size bobbin, switch to the correct size and see if that solves the problem.

Clean Bobbin Case

Cleaning your bobbin case can help ensure that the bobbin is sitting properly and winding evenly. Use a small brush or a can of compressed air to remove any debris from the bobbin case.

Check Thread Tension

Make sure that the tension of your thread is not too loose. Adjust the thread tension as needed to ensure the thread is winding evenly around the bobbin.

Replace Bobbin

If your bobbin is worn out or misshapen, replace it with a new one.


Uneven bobbin winding can be a frustrating issue to deal with while sewing. Fortunately, there are several reasons and ways to fix it.

By understanding the common causes and taking the appropriate steps, you can return your sewing machine to working order and continue enjoying your hobby.

Regularly clean your machine and replace your bobbins to avoid future issues.


Can using the wrong thread cause uneven bobbin winding?

Yes, using a thread that is too thick or thin for your machine can cause tension issues and lead to uneven bobbin winding.

How do I know if my bobbin case is dirty?

Look for dust, lint, or debris inside the bobbin case. You can also use a small brush or compressed air to clean it out.

What should I do if adjusting the tension doesn’t work?

If adjusting the tension doesn’t solve the issue, consider taking your machine to a professional for a tune-up or repair.

How can I prevent uneven bobbin winding from happening again?

Regularly clean your machine and replace your bobbins to prevent debris buildup and wear and tear. Also, use the correct thread and tension for your machine.

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