Wind the bobbin before you thread the needle
A bobbin is the small spool that holds thread underneath your fabric. It works together with the top thread to form the stitches you see. Before you can sew, you need to wind thread onto an empty bobbin, then insert it into the bobbin case under the needle plate.
Most machines have a bobbin winder built into the machine itself — usually a spindle on the top or side. The process takes two to three minutes and is the same basic steps on nearly every machine, though the exact location of parts varies by model.
Key Takeaways
- Empty bobbins are small plastic or metal spools that fit into a slot on your machine's bobbin winder.
- You wind the bobbin while the presser foot is up and the needle is in the highest position, which disengages the feed dogs so thread feeds smoothly onto the bobbin.
- The bobbin winder has a tension disc that you guide thread through to control how tightly it winds.
- Once wound, you insert the bobbin into the bobbin case under the needle plate, then thread the bobbin thread up through the tension spring.
Gather your empty bobbin and thread
Check your machine's manual to see what size bobbin it uses — most modern machines use class A or class M bobbins, which are small plastic spools about the size of a coin. Your machine came with several empty bobbins. If you have lost them or worn them out, you can buy replacements at any fabric store or online, and they cost a few dollars for a pack of five or ten.
Choose the thread color and weight you want to use. Bobbin thread is usually the same weight as your top thread — if you are using regular cotton thread on top, use regular cotton in the bobbin. Some sewers use lightweight bobbin thread to reduce bulk, but this is optional and depends on your fabric and stitch type.
Place the bobbin on the winder and raise the presser foot
Locate the bobbin winder on your machine — it is usually a spindle on the top right or top left of the machine. Slide the empty bobbin onto the winder spindle until it sits flat and snug. The spindle may have a small notch or groove that helps hold the bobbin in place.
Raise the presser foot all the way up using the presser foot lever on the back of the machine. This step is crucial: raising the presser foot disengages the feed dogs and opens the tension discs, which allows thread to wind smoothly onto the bobbin without resistance. If you skip this step, the thread will wind too tightly or unevenly.
Guide thread through the tension disc and start winding
Take the end of your thread and guide it through the bobbin winder tension disc — a small slot or notch near the spindle. The exact location varies by machine, so check your manual if you cannot find it. The tension disc controls how tightly the thread winds onto the bobbin. Once the thread is threaded through, hold the thread end loosely in your hand.
Press the foot pedal gently or press the start button, depending on your machine type. The bobbin will begin to spin. As it spins, the thread will wrap around it in even layers. Hold the thread end lightly so it feeds smoothly — do not pull hard or the thread may break or wind unevenly. Most machines will wind a full bobbin in 30 to 60 seconds.
Stop when the bobbin is full
Watch the bobbin as it fills. When it reaches the top edge of the spindle and is completely full, the winder will usually stop automatically — many machines have a sensor or a mechanical stop that cuts power to the winder. If your machine does not have an automatic stop, release the foot pedal or press the stop button when the bobbin looks full.
Do not overfill the bobbin. If thread winds past the edge of the spool, it will catch on the bobbin case when you insert it, causing thread breaks and skipped stitches. If you overfill by accident, you can carefully unwind the excess thread by hand.
Remove the bobbin and trim the thread
Slide the full bobbin off the winder spindle. Trim the thread close to the bobbin with scissors or thread cutters. The short tail of thread will help you pull the bobbin thread up through the tension spring when you insert the bobbin into the case.
Set the full bobbin aside and lower the presser foot back down. This re-engages the feed dogs and closes the tension discs, preparing the machine for sewing.
Insert the bobbin into the bobbin case
Locate the bobbin case — a small metal or plastic chamber under the needle plate. On most machines, you access it by raising the presser foot, removing the needle plate (usually held by one or two screws), and lifting out the bobbin case. Some machines have a drop-in bobbin system where the case stays in place and you straightforward drop the bobbin in from above. Check your manual to see which type you have.
Place the full bobbin into the case with the thread tail pointing toward the tension spring — a small metal hook or slot on the side of the case. Pull the thread tail under the tension spring so it sits in the groove. This creates the correct tension for the bobbin thread. Close or reinsert the bobbin case, then replace the needle plate and tighten the screws.
Frequently Asked Questions
What happens if I wind the bobbin with the presser foot down?
The thread will wind too tightly or unevenly because the tension discs are closed. You may also hear grinding or feel resistance. Always raise the presser foot before winding to open the tension discs and let thread feed freely.
Can I use the same bobbin over and over?
Yes. Once a bobbin is empty, you can wind it again with new thread. Bobbins last for years unless they crack or the winding surface becomes damaged. Most sewers keep five to ten bobbins on hand so they always have a full one ready.
Why does my bobbin thread keep breaking while I sew?
Check that the bobbin is wound evenly and not overfilled. Also make sure the thread tail is seated under the tension spring in the bobbin case. If the thread is not under tension, it will tangle and break. If the bobbin was wound too tightly, unwind it and rewind more gently.
Do I need to match the bobbin thread color to the top thread?
For most sewing, yes — the bobbin thread shows on the underside of your fabric. If you are sewing a seam that will not be visible, or if you are testing a stitch, you can use any color. Some sewers use neutral gray or beige bobbins for all projects to save time.
What if my machine has a drop-in bobbin instead of a removable case?
Drop-in bobbins sit in a slot on top of the machine under the needle plate, and you do not remove the case. straightforward drop the wound bobbin into the slot, pull the thread tail under the tension spring, and close the cover. The winding process is the same — only the insertion step differs.