Wind the bobbin on your machine's winding mechanism, or by hand if your machine doesn't have one
Most sewing machines have a bobbin winder built into the machine itself — a small wheel or spindle on the side or top that holds an empty bobbin and winds thread onto it automatically. You place an empty bobbin on the winder, thread the machine's bobbin-winding mechanism, press a lever or button, and the machine winds the thread for you. If your machine has no winder, you wind by hand using a bobbin winder tool, which looks like a small handheld device with a spindle.
The bobbin is the small spool that sits inside your machine's shuttle or rotary hook and holds the thread that forms the bottom loop of your stitches. Without a properly wound bobbin, your machine will skip stitches, bunch thread, or refuse to sew at all. Winding takes two to five minutes depending on how full you want the bobbin and whether you use the machine's automatic winder or wind by hand.
Key Takeaways
- Your machine's bobbin winder is usually a dial or wheel on the side of the machine that you set up by pressing a lever or button after threading the bobbin.
- Thread the bobbin winder by running thread from your machine's spool through the tension guide or directly onto the empty bobbin, depending on your machine's design.
- Stop winding as soon as the bobbin is full — overfilled bobbins jam in the shuttle and underfilled ones run out mid-seam.
- If your machine has no built-in winder, use a handheld bobbin winder tool, which you turn by hand while holding the thread steady.
Locate your machine's bobbin winder and empty bobbin
Open your sewing machine manual and find the diagram showing the bobbin winder location. On most machines, it is a dial, wheel, or spindle on the right side or top of the machine. Some machines have the winder on the left. The manual will show you exactly where yours is and how to set up it.
Get an empty bobbin — the small plastic or metal spool that came with your machine. Bobbins are machine-specific; a bobbin for a Brother machine will not fit a Janome or Singer. If you have lost your original bobbins, buy replacements that match your machine's model number. Most machines come with two to four bobbins, so you can wind several while one is in use.
Thread the bobbin winder correctly
Pull thread from your machine's main spool and run it through your machine's bobbin-winding tension guide. This is usually a small metal or plastic loop or slot near the winder itself. Check your manual for the exact path — some machines route the thread through a tension disc, others through a straightforward guide. Threading through the tension guide prevents the bobbin from winding too tightly or unevenly.
Wrap the thread around the empty bobbin two or three times by hand, going around the bobbin's circumference. This anchors the thread so it does not slip when the winder starts. Place the bobbin onto the winder spindle. The spindle will hold the bobbin in place as it turns.
Push the bobbin winder lever or button to engage it. On most machines, this is a small lever you push to the side, or a button you press. The winder will now be active and ready to turn. Some machines require you to disengage the needle by turning a dial or pressing a button so the main motor does not run while the bobbin winds.
Wind the bobbin on an automatic machine winder
Press the foot pedal gently or press the start button, depending on your machine type. The bobbin will begin to spin and wind thread onto itself. Keep your hand near the thread spool to make sure it feeds smoothly and does not tangle. The winding should be even and smooth; if the thread bunches or winds unevenly, stop and rethread the tension guide.
Watch the bobbin as it fills. Most bobbins have a line or groove that marks when they are full. Stop winding as soon as the thread reaches that line. Overfilled bobbins jam inside the shuttle; underfilled ones run out of thread mid-seam. When the bobbin is full, release the foot pedal or press stop. Cut the thread and remove the bobbin from the winder.
Wind a bobbin by hand if your machine has no automatic winder
If your machine has no built-in winder, use a handheld bobbin winder tool. These are inexpensive and available at any fabric or craft store. Place the empty bobbin on the spindle of the handheld winder. Thread the bobbin winder by running thread from your spool through any tension guide on the tool (some have one, some do not) and wrap it around the bobbin two or three times.
Hold the bobbin winder steady in one hand and turn the handle with the other. Turn slowly and steadily so the thread winds evenly. Keep slight tension on the thread with your free hand to prevent loose or bunched winding. As the bobbin fills, watch for the full line. Stop turning when the bobbin reaches that mark, cut the thread, and remove the bobbin.
Troubleshoot uneven or loose winding
If the thread winds unevenly or bunches on one side, the tension is wrong. Stop, rethread through the tension guide, and start again. Make sure the thread is running straight from the spool to the bobbin with no kinks or loops in between.
If the bobbin winds too loosely and thread falls off when you remove it, you may have missed the tension guide entirely. Rethread and make sure the thread passes through the correct slot or loop before it reaches the bobbin. If the thread is too tight and the bobbin barely turns, loosen your grip on the thread or check that the tension guide is not pinching it.
If the bobbin winder on your machine will not engage or turn, check your manual to see if you need to disengage the needle or press a separate button. Some machines require you to turn a dial to "bobbin wind" mode before the winder will work.
Insert the wound bobbin into your machine
Once the bobbin is wound and removed from the winder, insert it into your machine's bobbin case or shuttle. The bobbin case is usually a small metal or plastic chamber on the left side of the machine, below the needle. Open the case by unlatching a small lever or sliding a cover. Place the bobbin inside with the thread running in the correct direction — your manual shows which way the thread should feed.
Pull the thread through the tension spring or slot in the bobbin case, then close the case. Pull the bobbin thread up through the needle plate so it sits next to the needle thread. You are now ready to thread the needle and begin sewing.
Frequently Asked Questions
How full should a bobbin be?
Fill the bobbin until the thread reaches the line or groove marked on the bobbin itself. This is usually about three-quarters full. A completely full bobbin jams in the shuttle; one that is too empty runs out mid-seam. The marked line exists for this reason.
Can I use a bobbin from a different machine?
No. Bobbins are machine-specific and vary by size and shape. A bobbin from a Brother machine will not fit a Singer or Janome. Always use bobbins made for your exact machine model. Check your manual or the original packaging to find the correct bobbin type.
What if my bobbin winder keeps slipping?
The bobbin may not be seated correctly on the spindle. Remove it and place it again, making sure it sits flat and centered. If it still slips, the spindle may be worn or the bobbin may be damaged. Try a different bobbin, or contact the machine manufacturer if the spindle itself is loose.
Do I need to wind a new bobbin every time I sew?
No. Wind several bobbins at once and keep them ready. Most machines come with two to four bobbins so you can wind one while using another. Wind a new bobbin only when the one in your machine runs out of thread.
Why does my bobbin wind unevenly?
Uneven winding usually means the thread is not running through the tension guide. Stop, rethread through the correct slot, and start again. Make sure the thread path is straight with no kinks. If the problem continues, check that the bobbin is seated correctly on the spindle.