How to Thread a Singer Sewing Machine

How to Thread a Singer Sewing Machine might seem daunting at first, especially if you’re new to sewing. While you can find instructions in your machine’s manual or on the machine itself, sometimes these diagrams can be confusing.

 A 2023 study published in the Journal of Textile Engineering explored the impact of bobbin materials on thread tension consistency. The research found that bobbins made from high-grade polymers resulted in 15% more consistent tension compared to traditional metal bobbins.

This comprehensive guide will walk you through the process of threading a bobbin on a Singer sewing machine. We’ll cover winding the bobbin, inserting it correctly, and troubleshooting common issues.

Singer Sewing Machine

We’ll cover winding the bobbin, inserting it correctly, and troubleshooting common issues.

Preparing to Wind the Bobbin 

Before you start winding your bobbin, ensure you have the correct type for your Singer machine. Most modern Singer machines use Class 15 bobbins, but always check your user manual to be sure.

1.Place the Thread Spool 

Start by placing your thread spool on the spool pin. If your machine has a horizontal spool pin, remember to use a spool cap to keep the thread in place. For vertical spool pins, a cap isn’t always necessary if the spool sits securely.

2.Guide the Thread 

Next, pull the thread end and guide it through the first thread guide. This is usually a small metal loop near the top of the machine.

3.Engage the Bobbin 

Winder On most Singer machines, you’ll find the bobbin winder on top of the machine. Push it to the right to engage it.

4.Thread the Tension Disc 

Guide your thread around the bobbin tension disc. This small metal piece helps maintain consistent tension as you wind the bobbin.

5.Thread the Bobbin 

Take your empty bobbin and thread it through the small hole on top. Place the bobbin onto the bobbin winder spindle, pushing it down until it clicks into place.

6.Start Winding 

Hold the thread end and gently press on your machine’s foot pedal or use the start button if you have an electronic model. The bobbin will begin to wind.

7.Continue Winding 

Resume winding by pressing the foot pedal or start button again. The bobbin will continue to fill until it’s full or you stop the machine.

8.Finish Up 

Once the bobbin is full, cut the thread, push the bobbin winder back to the left, and remove the bobbin from the spindle.

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Inserting the Bobbin 

Now that you’ve wound your bobbin, it’s time to insert it into your Singer sewing machine. There are two types of bobbin systems in Singer machines: top-loading and front-loading.

Top Loading Bobbin

1.Open the Bobbin Cover Locate the bobbin cover on your machine’s needle plate. Press the release button to open it.

2.Insert the Bobbin Drop the bobbin into the bobbin case. The thread should unwind counterclockwise when you pull it.

3.Guide the Thread Pull the thread through the slot in the bobbin case, then under the tension spring. You should feel a slight resistance as the thread slides into place.

4.Close the Cover Pull about 4 inches of thread out and close the bobbin cover.

Front-Loading Bobbin

1.Access the Bobbin Case Remove the accessory tray (if your machine has one) and open the hinged cover to access the bobbin area.

2.Remove the Bobbin Case Find the small latch on the bobbin case and pull it to remove the case from the machine.

3.Insert the Bobbin Place the bobbin into the case so that the thread unwinds clockwise when you pull it.

4.Thread the Case Guide the thread through the slot in the bobbin case and under the tension spring, leaving a few inches of thread tail.

5.Replace the Bobbin Case Hold the bobbin case by its latch and insert it back into the machine. Make sure it clicks into place.

6.Close the Cover Close the hinged cover and replace the accessory tray if applicable.

Troubleshooting Common Bobbin Issues 

Even with careful threading, you might encounter some bobbin-related issues. Here are a few common problems and their solutions:

1.Bobbin Thread Bunching: This often happens when the upper thread tension is too tight. Try loosening it slightly.

2.Bobbin Not Winding Evenly: Make sure the thread is properly seated in the tension disc before winding.

3.Bobbin Thread Breaking: Check for any rough spots on your bobbin or bobbin case that might be catching the thread.

4.Bobbin Making Noise: Ensure the bobbin is inserted correctly and the case is properly seated in the machine.


You’ve now learned how to thread a bobbin on your Singer sewing machine! We’ve covered everything from winding the bobbin to inserting it correctly, whether you have a top-loading or front-loading system. I know it might seem like a lot to remember at first, but with a bit of practice, you’ll be threading bobbins like a pro in no time.

Proper bobbin threading is crucial for achieving high-quality stitches and avoiding frustrating sewing issues. If you encounter any problems, don’t hesitate to refer back to this guide or consult your machine’s manual.

And if you’re looking to expand your sewing knowledge further, why not check out our guide on choosing the best thread for your Singer sewing machine? It’s packed with helpful tips to ensure your projects turn out beautifully every time.

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