How to Adjust Bobbin Tension on Brother Sewing Machine?

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The Brother sewing machine is known in the industry for excellent quality stitching performance. However, you may not get such optimum quality stitching if the bobbin tension is not properly adjusted. You will end up with either too loose or too light stitches in an incorrectly adjusted bobbin tension of the machine.

Many beginner sewers lack the idea of bobbin tension adjustment and hence, they end cannot produce the desired stitch. But adjusting the bobbin tension is pretty easy and any beginner or novice can do it easily.

In this guide, we will discuss how to adjust bobbin tension on the Brother sewing machine.

How to Adjust Bobbin Tension on Brother Sewing Machine

What is the Tension in a Sewing Machine?

Before we jump to the tutorial, let’s know what is the tension in the sewing machine. The stitch tension or thread tension is the amount of pressure on the thread that passes through the machine to produce stitches. Sewing or stitching quality on a fabric depends a lot on the tension. Higher pressure on the thread will produce loose stitch.

Besides, lower pressure on the stitch will produce a tighter stitch. The sewing tension can be easily altered using the built-in dial on your sewing machine. The dial should be in the right position to produce the perfect stitch along with other factors.

How does Tension work?

There are two types of tension in the sewing machine which are top thread tension and bottom thread tension. Most of the sewing machines feature two metal discs on the top to utilize the top tension. You can control the thread using the dial on the machine. There is a spring that will adjust the thread when you turn the dial.

If you turn the machine two the increment of the number, then the tension of the machine will increase. You can decrease the tension by doing the opposite. Though in most of the machines you will require manually adjusting the tension, some sewing devices may adjust the tension automatically.

Make sure that the presser foot is raised when you are adjusting the sewing tension. Another type of tension is called bottom tension which is also known as bobbin tension. The tension can be adjusted by tweaking a screw on the bobbin case. You will usually don’t require adjusting the bobbin tension that much.

When Do You Require Adjusting the Tension?

The sewing tension doesn’t require frequent adjustment. You will only need to alter the top tension if the top thread tension alters somehow. Such as, it can happen while changing the thread weight from heavy to low. You may also require changing the tension when your thread material or brand is changed.

You will also need to adjust the top thread tension if the bobbin stitches are visible on the top of the fabric. If you think that the top thread is properly adjusted, then it can happen for the weak threads from the bobbin.

Sometimes, the needle threads can be visible on the bottom of the fabric when the bottom thread is tightening much. However, it can also happen for the weak threads that arrive from the top. In both of the situations, you will need to correctly adjust both tensions following the user manual.

How to Adjust Bobbin Tension on Brother Sewing Machine?

Before you begin to adjust the tension, we recommend you to give a check to the user manual. You can acknowledge the suggested range of sewing tension. More so, it may also describe the correct way of adjusting the tension on both the top thread and bobbin.

Before adjusting the sewing tension, it is better to try stitching by setting the top tension to the suggested range. If it doesn’t work, you may follow the below tutorial to adjust the bottom tension.

  1. There should be a small screw in the bobbin case (usually on the flat or closed side).
  2. Turn the screw carefully to anti-clockwise for relaxing the bobbin tension.
  3. If you want to tighten the bobbin tension then turn the screw clockwise slowly.

Sometimes, it can be hard to find the right screw that you should turn.  In such a situation, you better check the user manual to acknowledge the position of the screw. Turning the other screws in the area may malfunction the machine. So, perform all the steps carefully.

Special Tips to Solve Issues with Bobbin Tension

Issues related to poor stitching quality can also be caused by some other reasons apart from the thread tensions. So, if you cannot solve the stitching problem by changing the tension, you may try implementing the below tips.

  1. Detach the top thread of the sewing machine that goes into the needle. Now detach the bobbin and its case from the machine. Clean the surrounding area of the bobbin by following the steps mentioned in the manual.
  2. Give a careful look at the mechanism in the area. Make sure that the pathway of the tread is clean and nothing is blocking its action. 
  3. Make use of the best needles that are compatible with your device. Don’t use the same needle for a long time.
  4. Use the right and compatible thread depending on the type of fabric. While rethreading the machine, follow the recommended instructions on the manual.
  5. Make sure that the thread is flowing in the right way by removing the bobbin and its case.


Both the bobbin tension and top thread tension are extremely important to get smooth quality stitching from a sewing machine. Now you can easily adjust the tension by following the steps in the article. We hope that the above write-up on how to adjust bobbin tension on the brother sewing machine will be helpful for you.

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About Haven Erdman Website Author

About Haven Erdman

Hi there, this is Haven Erdman, the owner, and editor-in-chief of the “sewing associate” website. I am a full-time businessman who owns several sewing shops. I started my sewing journey from home when I was 19 years old. Apart from the businesses, I am a passionate writer who has featured in several fashion blogs. I love to share my experience in the industry with others through writing.

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