How to Replace Tension Assembly on Sewing Machine

The process of replacing the tension assembly involves preparing the sewing machine by unplugging it and accessing the tension assembly location. Once the old tension assembly is removed, the new one is installed in its place, and its position is secured with screws. Finally, test the new tension and adjust it accordingly if any issues persist.

There is a lot to know if you are going to replace the tension assembly on your sewing machine. To know the process of how to replace tension assembly on sewing machine, go through this whole article.

Tools Needed for the Process

  • Screwdriver (size will depend on the type of screws securing the old assembly)
  • Pliers (optional)

Instructions for Replacing Tension Assembly on Sewing Machines

Here are detailed instructions to guide you through the process of replacing the tension assembly on your sewing machine:

Gather the Necessary Tools: 

Before starting the replacement process, ensure you have the required tools on hand. You will need a screwdriver, pliers, and the replacement tension assembly.

Prepare the Sewing Machine:

For safety purposes, turn off and unplug your sewing machine. This prevents any accidental movement of the needle while working on it. Additionally, remove the faceplate and bobbin case to access the internal components.

Access the Tension Assembly: 

Identify the location of the tension assembly on your sewing machine. Depending on the type of sewing machine you have, you may need to remove additional parts. It will help you to access the tension assembly fully.

Remove the Old Tension Assembly: 

Using pliers, carefully remove the old tension assembly from your sewing machine. Take note of its position and any surrounding parts or thread. If you notice any thread or debris in the tension unit, clean it out before proceeding.

Install the New Tension Assembly: 

Place the new tension assembly in the same position as the old one. Ensure it aligns correctly with the surrounding components and fits securely.

Test and Adjust the Tension: 

Finally, Using the appropriate screwdriver, secure the new tension assembly in place with the provided screws. Ensure that it is firmly attached to prevent any issues during sewing.

After replacing the tension assembly, it’s essential to test the tension on a scrap piece of fabric to ensure it is working correctly. Sew a few stitches to check the stitch quality and tension balance. If the tension is not correct, refer to your sewing machine’s manual for instructions on how to adjust it properly.

Please note that these instructions are general guidelines and may vary based on your specific sewing machine model. Always refer to your sewing machine’s manual for manufacturer-specific instructions and precautions.

Tips and Tricks:

If your sewing machine is skipping stitches, it’s probably time to replace the tension assembly. Follow these steps to do it yourself, and save money on repairs!

First, remove the needle and presser foot from the machine. Then, using a screwdriver, remove the plate that covers the tension assembly. Be careful not to lose any of the tiny parts!

  • Next, remove the old tension assembly from the machine:
  • Disconnect the thread tension spring from the shaft to do this.
  • Lower the tension lever and unscrew the tension nut.
  • Pull the entire assembly out of the machine.

Now it’s time to install the new tension assembly. Start by connecting the thread tension spring to the shaft. Then, screw on the new tension nut and raise the tension lever. Finally, replace the plate and screw it into place.

That’s it! You’ve replaced your sewing machine’s tension assembly with a few simple steps and fixed those skip-stitch problems for good.

More Things To Look For

If your sewing machine is not operating smoothly, it may be due to a problem with the tension assembly. Fortunately, this is a relatively easy issue to fix. Follow the steps below to troubleshoot and replace the tension assembly on your sewing machine.

  • First, check the bobbin case to ensure it is inserted correctly and that the thread is not tangled.
  • Next, check the needle to ensure it is inserted properly and is the correct size and type for the fabric you are sewing.
  • If both the bobbin case and needle are inserted correctly, and you are still experiencing tension problems, then the issue is likely with the tension assembly itself.

To replace the tension assembly:

  • First, remove the old tension assembly by unscrewing the screws in place.
  • Next, insert the new tension assembly into place and screw it in securely.
  • Finally, test your sewing machine to ensure it is operating smoothly.

Frequently Asked Questions (FAQs):

What Controls the Tension of the Thread?

The tension of the thread in a sewing machine is controlled by two main components. That is the tension discs and the tension regulator. The tension discs apply pressure on the thread. And the tension regulator controls the amount of pressure exerted by the tension discs on the thread.

What Is The Tension Assembly on a Sewing Machine?

The tension assembly on a sewing machine serves the crucial function of adding resistance to the top thread. This resistance is essential for securing the stitches in place and achieving well-formed and stable sewing results.

What Part of the Sewing Machine Controls the Tension Disc?

The tension discs of the sewing machine are controlled by the tension regulator. It causes them to open when the presser foot is up and close when the presser foot is down.

What is Needle Thread Tension Assembly?

The needle thread tension assembly is a combination of the tension discs and the tension regulator. Together, they work to regulate the tension of the thread during sewing. This assembly is responsible for maintaining the appropriate tension of the thread, ensuring balanced and even stitches in your sewing projects.


Now, you know how to replace the tension assembly on sewing machines.

You have reached the end of this tutorial on replacing the tension assembly on your sewing machine. We hope that you found it helpful and that you now feel confident tackling this repair on your own.

Happy sewing!

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