Thread the bobbin the same way you thread the needle
A bobbin is the small spool that holds thread underneath your fabric. When you sew, the needle thread loops around the bobbin thread to create a stitch. To fill a bobbin on a Singer machine, you wind thread onto an empty bobbin using the bobbin winder — a small wheel or mechanism on the side or top of your machine. The thread path is almost identical to the one you use for the needle, which makes the process straightforward once you know where each part sits.
Most Singer machines have the bobbin winder on the right side of the machine body. You'll see a small spool pin (a metal post) where you place your thread spool, then guide the thread through the tension discs and onto the bobbin itself. The exact location varies slightly between Singer models — some have the winder on top, others on the side — but the steps remain the same.
Key Takeaways
- Place an empty bobbin on the bobbin winder pin and guide thread through the tension discs before winding begins.
- Engage the bobbin winder by sliding the winder wheel toward the machine body or pressing a button, depending on your Singer model.
- Stop winding as soon as the bobbin is full; overfilled bobbins cause thread breakage and uneven stitches.
- Wind bobbins before inserting them into the bobbin case, and always use the same thread type and weight for both needle and bobbin.
Locate the bobbin winder on your machine
Open your Singer machine's manual or look at the machine itself to find the bobbin winder. On most Singer models, it sits on the right side of the machine near the top. You'll see a small metal or plastic wheel with a pin in the center — this is where the empty bobbin sits. Some newer Singer machines have the winder on the top surface, and a few models use a front-mounted winder.
If you can't locate it, check the model number on your machine (usually on a sticker on the back or bottom) and search for your specific model's manual online. Singer's website and YouTube channels often have videos showing exactly where the winder is for your machine type. Knowing your model number takes the guesswork out of the process.
Thread the bobbin winder correctly
Place your thread spool on the spool pin at the top or side of the machine — the same place you put thread for needle threading. Take the thread end and guide it through the tension discs. On most Singer machines, you'll see two small metal discs or a slot labeled for bobbin winding. Thread the line between or through these discs, just as you would for the needle.
Next, place an empty bobbin onto the bobbin winder pin. The bobbin should slide onto the pin smoothly and sit flat. Guide the thread end around the bobbin once or twice by hand, holding it gently so it catches on the bobbin's grooves. This prevents the thread from slipping when you start winding. Some Singer machines have a thread guide or clip near the winder that holds the thread in place — check your manual to see if yours does.
Engage the winder and fill the bobbin
Once the thread is in place, engage the bobbin winder. On most Singer machines, you do this by sliding the winder wheel toward the machine body or pressing a button. The exact method depends on your model — some have a lever you flip, others have a wheel you slide, and newer models may have a button. When engaged, the winder wheel will turn and wind thread onto the bobbin automatically.
Press the foot pedal gently or use the speed control to start winding. The bobbin will fill gradually. Watch it as it winds — you'll see the thread building up in layers. Stop winding as soon as the bobbin is full. A full bobbin should be level with the top of the bobbin case, with no thread extending beyond the edges. Overfilled bobbins cause thread to jam, break, or create uneven stitches.
Remove the bobbin and disengage the winder
Once the bobbin is full, stop the machine and disengage the winder by sliding the wheel back or pressing the button again. Cut the thread between the spool and the bobbin with scissors. Gently slide the bobbin off the winder pin. The bobbin is now ready to insert into the bobbin case.
If you're filling multiple bobbins, repeat the process with a fresh empty bobbin. Many sewers keep several bobbins wound and ready, especially if they work with different thread colors. This saves time during longer sewing projects.
Insert the filled bobbin into the bobbin case
The bobbin case is the small compartment below the needle plate where the bobbin sits during sewing. Open the bobbin case door (usually on the front or side of the machine) and place the filled bobbin inside. The thread should unwind in the direction marked on your machine — most Singer machines have an arrow or line showing which way the bobbin should turn.
Pull the thread through the tension spring or slot in the bobbin case, depending on your model. This ensures the thread feeds correctly during sewing. Close the bobbin case door and you're ready to thread the needle and begin sewing. If your stitches look loose or uneven, the bobbin thread may not be seated correctly in the tension spring — open the case and reposition it.
Troubleshoot common bobbin winding problems
If the thread slips off the bobbin while winding, the thread may not have caught properly on the bobbin's grooves at the start. Stop, remove the bobbin, and try again, holding the thread more firmly as you begin winding. If the bobbin winds unevenly or the thread bunches on one side, the thread may not be threaded through the tension discs correctly — rethread it and try again.
If the winder won't engage or the bobbin won't turn, check that the bobbin is seated fully on the winder pin and that the winder is disengaged from the needle. Some Singer machines require you to disengage the needle mechanism before the bobbin winder will work. Consult your manual if the winder still won't turn. Never force the winder — if it resists, something is not positioned correctly.
Frequently Asked Questions
Can I use a bobbin from a different brand in my Singer machine?
Most Singer bobbins are interchangeable within Singer machines, but some older or specialty models use unique bobbin sizes. Check your manual to confirm your bobbin type — it will list the correct bobbin class (Class 15, Class A, or Class L are common). Using the wrong bobbin can cause thread tension problems or jamming.
How full should a bobbin be before I stop winding?
Fill the bobbin until the thread reaches the top edge of the bobbin case, level with the rim. The bobbin should look full but not overstuffed. If thread extends beyond the edges, it will catch and break. If it's underfilled, you'll run out of thread mid-project and have to rewind.
What thread should I use for the bobbin?
Use the same thread type and weight as your needle thread. If you're using all-purpose polyester for the needle, use all-purpose polyester for the bobbin. Mixing thread types or weights causes tension imbalances and uneven stitches. Bobbin thread is thinner than regular thread, but you can use regular thread if bobbin thread isn't available.
Why does my bobbin keep slipping off the winder pin?
The bobbin may not be sliding onto the pin far enough, or the pin may be worn. Make sure the bobbin slides all the way onto the pin until it sits flat and find. If it still slips, the pin may be damaged — contact a Singer service center or look for replacement pins online for your machine model.
Do I need to wind a new bobbin every time I change thread colors?
Yes, if you want the bobbin thread to match or coordinate with your needle thread. However, if you're doing decorative stitching or the bobbin thread won't show, you can use any color. Many sewers keep several pre-wound bobbins in different colors ready to swap quickly.