Thread the bobbin case first, then insert it into the machine
Loading a bobbin on a Brother sewing machine means putting thread on a small spool, winding it, and then placing that spool in the bobbin case under the needle plate. The bobbin holds the lower thread that locks with the upper thread to form a stitch. On most Brother machines, you wind the bobbin on a spindle at the top of the machine, then drop the wound bobbin into a case that sits below the needle plate.
The process has two parts: winding the bobbin with thread, and then inserting the bobbin case into the machine. Both steps matter—a bobbin wound unevenly or inserted wrong will cause skipped stitches or thread breaks. This guide walks you through both.
Key Takeaways
- Wind the bobbin on the spindle at the top of the machine by threading it through the tension guide, placing it on the spindle, and pressing the foot pedal or holding the start button until the bobbin is full.
- A full bobbin will stop winding automatically on most Brother machines, or you can cut the thread and remove it when it reaches the edge of the spool.
- Insert the wound bobbin into the bobbin case by dropping it in so the thread sits in the tension spring, then slide the case into the machine until it clicks.
- Pull the upper thread down through the needle to catch the bobbin thread loop before you start sewing, or your first stitches will pull thread from underneath.
Winding the bobbin with thread
Start with an empty bobbin—a small plastic or metal spool that holds the lower thread. Place it on the bobbin winder spindle, which is a metal post at the top right of your Brother machine (the exact location varies by model, but it is always at the top). The spindle has a small notch or slot; slide the bobbin onto it so the notch faces outward.
Thread the bobbin winder by running thread from your upper thread spool through the bobbin winder tension guide—a small metal loop or slot near the spindle. This guide keeps tension even as the bobbin fills. Then wrap the thread around the bobbin two or three times by hand to anchor it, and trim the loose end.
Press the bobbin winder spindle to the right (or engage the bobbin winding clutch, depending on your model) so the machine knows to wind rather than sew. Then hold down the foot pedal or press and hold the start button. The bobbin will spin and fill with thread. Most Brother machines stop automatically when the bobbin is full, or you can stop when the thread reaches the outer edge of the bobbin. Cut the thread and remove the full bobbin.
Inserting the bobbin into the bobbin case
The bobbin case is a small metal or plastic housing that holds the bobbin under the needle plate. On most Brother machines, you access it by lifting the presser foot, raising the needle to its highest point, and then opening the needle plate cover or removing the needle plate itself (check your manual for your exact model—some machines have a drop-in bobbin that does not require a separate case).
Hold the bobbin case in one hand. Drop the wound bobbin into the case so it sits flat on the bottom. The thread should pass through the tension spring—a small metal clip inside the case that holds the thread at the right tension. You will feel slight resistance as the thread slides into the spring; this is correct.
Slide the bobbin case into the machine until you hear or feel a click. The case should sit flush with the machine bed. If it does not click or feels loose, remove it and reinsert it. A bobbin case that is not fully seated will cause the bobbin thread to tangle or break.
Catching the bobbin thread before you sew
Before you start sewing, you must bring the bobbin thread up through the needle plate so both threads lock together. Hold the upper thread (the one coming from the needle) and turn the handwheel toward you one full rotation. This motion pushes the needle down and back up, which catches the bobbin thread and pulls a loop to the surface.
Gently pull the upper thread upward. A loop of bobbin thread should come with it. Pull both threads to the left and behind the presser foot, or to the side, depending on your machine. This step prevents the first few stitches from pulling thread from underneath and creating a mess on the back of your fabric.
Troubleshooting a bobbin that will not wind
If the bobbin does not fill when you press the foot pedal, check that the bobbin winder spindle is engaged. On most Brother machines, you push the spindle to the right or flip a small lever to tell the machine to wind instead of sew. If the spindle is engaged and the bobbin still does not turn, the bobbin may not be seated properly on the spindle—remove it, check that the notch is facing outward, and try again.
If thread is not feeding onto the bobbin, the bobbin winder tension guide may be clogged with lint or old thread. Open the guide (usually by hand or with a small screwdriver) and clean it with a dry brush or cloth. Thread should flow freely through the guide as the bobbin fills.
Troubleshooting a bobbin that breaks or tangles thread
If the bobbin thread breaks while you sew, the bobbin case may not be fully inserted, or the bobbin itself may be wound unevenly. Remove the bobbin case, check that the bobbin sits flat and the thread passes through the tension spring, and reinsert the case until it clicks. If the bobbin was wound too fast or too loose, wind a new one at a slower speed.
If thread tangles under the fabric, the bobbin thread did not come up before you started sewing. Stop, raise the needle, and pull both threads to the side before continuing. You can also prevent this by always turning the handwheel one full rotation after inserting a new bobbin, even if you have already done so.
When to call a technician
If you have wound the bobbin correctly, inserted the case fully, and brought the bobbin thread up, but the machine still skips stitches or breaks thread, the bobbin case tension may need adjustment or the machine may need cleaning. Bobbin case tension is set at the factory and rarely needs change, but lint buildup under the needle plate can cause thread problems. Use a small brush to clean around the bobbin case and needle area, removing any lint or thread scraps.
If cleaning does not solve the problem, or if the bobbin case is cracked or the tension spring is bent, the case may need replacement. Contact a Brother service center or an authorized repair shop. A damaged bobbin case is inexpensive to replace and will restore normal stitching.
Frequently Asked Questions
Can I use any bobbin on my Brother machine?
No. Brother makes different bobbin sizes for different machine models. Check your manual or the Brother website for your machine's model number to find the correct bobbin type. Using the wrong size will not fit the case or will wind unevenly. Most Brother machines use either a Class 15 or Class A bobbin, but some newer models use a different style.
How full should the bobbin be?
Wind the bobbin until the thread reaches the outer edge of the spool. Most Brother machines stop automatically at this point. A bobbin that is too full may jam; one that is too empty will run out mid-project. If you are not sure, stop when the thread is level with the edge of the bobbin.
What if the bobbin thread keeps breaking?
Check that the bobbin is wound evenly and not too tight. If it is, wind a new one at a slower speed. Also check that the bobbin case is fully inserted and the thread passes through the tension spring. If the case is old or cracked, it may need replacement. Clean around the bobbin area with a brush to remove lint, which can catch thread and cause breaks.
Do I need to rewind the bobbin every time I change thread color?
Yes. If you want to use a different thread color in the bobbin, wind a new bobbin with that color. You can store wound bobbins for later use, but each project usually needs a fresh bobbin to avoid color mixing or running out mid-seam.
Why does my first stitch pull thread from underneath?
The bobbin thread did not come up before you started sewing. After inserting the bobbin case, always turn the handwheel one full rotation toward you to catch the bobbin thread and pull it to the surface. Hold both threads to the side before you start sewing.