Wind the bobbin before you thread the needle
A bobbin is the small spool that holds thread underneath your fabric. On a Singer machine, you wind it by hand using thread from a regular spool, then insert it into the bobbin case below the needle plate. The bobbin spins during sewing to create the lower thread loop that locks your stitches. If your bobbin is empty or nearly empty, you cannot sew — the machine will skip stitches or break thread.
Most Singer machines wind bobbins the same way, whether you own a basic model or one with more features. The process takes about two minutes once you know where each part sits. You do not need tools or special equipment beyond the bobbin itself and thread.
Key Takeaways
- Place an empty bobbin on the bobbin winder spindle, which is usually on the top right of your machine, and push it toward the tension disk until it clicks.
- Guide thread from your spool through the bobbin winder tension disk, then wrap it around the bobbin by hand two or three times to anchor it.
- Press the foot pedal or press the start button (depending on your model) and let the machine wind until the bobbin is full; it will stop automatically.
- Remove the full bobbin, trim the thread tail, and insert it into the bobbin case with the thread wound in the correct direction for your machine.
- If your bobbin winds unevenly or too loosely, the tension disk may be dirty or the bobbin may be damaged.
Locate the bobbin winder on your machine
Open the top of your Singer machine and look toward the right side. You will see a small metal or plastic spindle sticking up — this is the bobbin winder spindle. Next to it is a small wheel or disk with a groove in it. This is the bobbin winder tension disk. On some older Singer models, the tension disk is a separate piece you can see clearly; on newer machines, it may be built into the machine body.
The bobbin winder spindle should have a small notch or flat edge on one end. This is where the bobbin sits. Slide an empty bobbin onto the spindle so the notch or flat edge lines up with the spindle's matching edge. Push the bobbin toward the tension disk until you hear or feel a click — this means the bobbin is seated correctly and will spin when you start the machine.
Thread the bobbin winder and anchor the thread
Take thread from the spool on your machine's main spindle (the one you use for regular sewing). Pull the thread up and guide it through the slot or notch in the bobbin winder tension disk. The tension disk will grip the thread and control how tightly it winds onto the bobbin. If you skip this step, the thread will wind too loosely and your stitches will be weak.
Once the thread is through the tension disk, wrap it around the bobbin by hand two or three times, going around the bobbin's edge in the direction it will spin. This anchors the thread so it does not slip when the machine starts. Hold the thread tail loosely in your hand as you do this — you do not need to pull hard. After the third wrap, you can let go; the machine will take over.
Start the bobbin winder and let it run
On most Singer machines, you start the bobbin winder by pressing the foot pedal, the same way you would start sewing. On newer electronic models, there may be a dedicated start button or a bobbin wind button on the machine itself. Check your manual if you are unsure which method your model uses.
As soon as you press the pedal or button, the bobbin will begin to spin. The thread will wind onto it automatically. Do not hold the thread tail — let it go completely so it winds evenly. The machine will wind faster and faster until the bobbin is full. Most Singer machines have an automatic stop: when the bobbin reaches the right fullness, a small lever or sensor will trip and the machine will stop on its own. If your machine does not have an automatic stop, watch the bobbin and stop it by releasing the pedal when it looks full — the thread should reach near the edge of the bobbin but not spill over.
Remove the bobbin and prepare it for sewing
Once the bobbin stops, push it away from the tension disk (the opposite direction from how you pushed it on). It should slide off the spindle easily. If it does not, make sure you pushed it all the way away from the tension disk first.
Look at the thread tail hanging from the bobbin. Trim it to about two inches using scissors or thread snips. A long tail can get tangled when you insert the bobbin into the case. Now the bobbin is ready to go into the bobbin case, which sits under the needle plate. Insert it with the thread wound in the direction your machine requires — most Singer machines wind bobbins clockwise, and the thread should unwind from the top of the bobbin as it spins during sewing. Your manual will show you the correct direction for your specific model.
Troubleshoot uneven or loose winding
If your bobbin winds unevenly — with thread bunching on one side or gaps on the other — the bobbin winder tension disk may be dirty or clogged with lint. Unwind the bobbin and clean the tension disk with a small brush or a dry cloth. Lint buildup reduces the grip on the thread, causing loose or uneven winding. After cleaning, try again with a fresh bobbin.
If the thread winds too loosely even after cleaning, the bobbin itself may be damaged or warped. Plastic bobbins can crack or bend if dropped or if the machine was running when you tried to remove the bobbin. Metal bobbins are more durable but can also dent. A damaged bobbin will not hold thread tension properly. Replace it with a new one that matches your machine model — Singer bobbins come in different sizes, and using the wrong size will cause problems.
Use the correct bobbin type for your machine
Singer makes several bobbin styles, and using the wrong one will cause your machine to malfunction. The most common types are Class 15 (metal, used on many vintage and mechanical machines), Class L (plastic, used on many modern machines), and Class M (metal, used on some computerized models). Check your manual or the bobbin case itself — it usually has the correct bobbin type printed on it.
Bobbins are inexpensive and widely available at fabric stores, online retailers, and sewing shops. Buying a few extras means you can wind multiple bobbins in advance and swap them out as you sew, rather than stopping to wind a new one every time you run out of thread. Keep your spare bobbins in a small container so they do not roll away or get lost.
Frequently Asked Questions
How full should the bobbin be before I use it?
The bobbin should be wound until the thread reaches near the edge but does not spill over. If it is too full, the thread may catch and break during sewing. If it is too empty, you will run out of thread in the middle of a seam. Most Singer machines have an automatic stop that fills the bobbin to the right level, so trust that signal.
Can I wind a bobbin while the presser foot is down?
No. The presser foot must be up before you wind a bobbin. When the presser foot is down, the tension disks are engaged and will not grip the thread correctly for bobbin winding. Always raise the presser foot first.
What if my bobbin keeps slipping off the spindle?
The bobbin may not be pushed far enough toward the tension disk. Push it firmly until you feel or hear a click. If it still slips, the spindle may be bent or the bobbin may be cracked. Try a different bobbin, and if that works, replace the damaged one.
Do I need to wind a bobbin for every color of thread I use?
Yes, if you want to change the bobbin thread color. The bobbin thread shows on the underside of your fabric, so if you want the underside to match the top, you need a bobbin wound with the same color. Many sewers keep several bobbins wound with neutral colors like black, white, and navy so they do not have to wind a new one for every project.
Why does my bobbin wind unevenly on one side?
Uneven winding usually means the bobbin winder tension disk is dirty or the bobbin is not seated correctly on the spindle. Clean the tension disk with a dry brush and make sure the bobbin is pushed all the way toward the disk. If the problem continues, the bobbin may be warped — try a new one.