The bobbin goes in the bobbin case, which sits under the needle plate
The bobbin is the small spool that holds thread underneath your fabric. On Brother machines, it lives in a removable bobbin case — a metal or plastic housing that clips into the machine below the needle plate. To insert a bobbin, you wind thread onto an empty bobbin using the machine's winding mechanism, then place that wound bobbin into the case and snap the case back into the machine.
The exact steps depend on whether your Brother machine has a front-loading or top-loading bobbin case. Most newer Brother models use a front-loading case, which is easier to access. Older models and some specialty machines use a top-loading case under the needle plate. Both methods take about two minutes once you know the sequence.
Key Takeaways
- Wind thread onto an empty bobbin using the bobbin winder on the right side of your machine before you try to insert it.
- On front-loading machines, open the small door on the front of the machine, pull out the bobbin case, and drop the wound bobbin into the metal or plastic holder inside.
- On top-loading machines, lift the needle plate, drop the bobbin into the case under the plate, and lower the plate back down.
- The bobbin thread must pass through the tension spring inside the case so it catches correctly during sewing.
- If your machine skips stitches or pulls thread unevenly, the bobbin may not be seated properly or the thread may not be threaded through the tension spring.
Winding the bobbin before you insert it
You cannot insert an empty bobbin. First, you need to wind thread onto it using your machine's bobbin winder. On Brother machines, the winder is a small spool-shaped mechanism on the right side of the machine, near the top. Place an empty bobbin onto the winder post, then guide your thread from the spool through a tension disc (usually a small slot or clip on the winder) and wrap it around the bobbin a few times by hand.
Press the foot pedal or hold the start button to spin the bobbin. The machine will wind thread onto it automatically. Most Brother machines have a sensor that stops the winding when the bobbin is full — you will hear a click or feel the machine stop. If your machine does not have an auto-stop, watch the bobbin and stop when it is full but not overstuffed. A bobbin that is too full can jam in the case.
Front-loading bobbin case: the most common setup
If your Brother machine has a small door on the front face (below the needle), you have a front-loading system. Open that door by sliding or unlatching it — the method varies by model, but it usually takes one hand. You will see the bobbin case, a metal or plastic piece that looks like a small shuttle or boat.
Gently pull the bobbin case straight out toward you. It will come free from the machine. Hold it in one hand and look inside. You will see a small metal hook or holder in the center, and a thin metal tension spring along one side. Drop your wound bobbin into the center holder so the thread unwinds from the top of the bobbin. The bobbin should sit flat and spin freely.
Now guide the thread from the bobbin through the tension spring. The spring is a small curved piece of metal with a slot or opening. Pull the thread so it passes through that slot — you should feel a slight resistance, which means the tension is working. Once the thread is seated in the spring, push the bobbin case straight back into the machine until it clicks into place. Close the front door.
Top-loading bobbin case: older and specialty models
Some Brother machines, particularly older models and embroidery machines, load the bobbin from the top. To access the bobbin case, you must lift the needle plate — the flat metal or plastic piece directly under the needle. On most machines, the needle plate is held by a single screw or a small latch. Loosen or open that fastener and lift the plate away.
Underneath, you will see the bobbin case sitting in a round or oval opening. The case itself may be fixed in place or removable, depending on your model. If it is removable, gently pull it out. Drop your wound bobbin into the case so the thread unwinds from the top. Thread the bobbin thread through the tension spring, just as you would with a front-loading case. If the case is fixed, straightforward drop the bobbin in and thread it through the spring without removing the case.
Lower the needle plate back down and tighten the screw or latch. Make sure the plate sits flat and even — if it is crooked, the needle may hit it during sewing.
Threading the bobbin thread through the tension spring
This step is straightforward to skip and causes most bobbin problems. After the bobbin sits in the case, the thread must pass through a small metal tension spring. On most Brother machines, this spring is a curved piece of metal with a narrow slot. Pull the thread so it slides into that slot. You should feel the thread catch slightly — that resistance is the tension working.
If the thread is not in the tension spring, the bobbin thread will be too loose, and your stitches will look loopy or uneven on the back of your fabric. If you sew and notice that the bottom thread is not catching properly, stop, remove the bobbin case, and check that the thread is seated in the spring. It is the most common fix for bobbin problems.
Checking that the bobbin is seated correctly
Before you start sewing, make sure the bobbin case is fully inserted and locked into place. On front-loading machines, you should hear or feel a click when the case snaps in. On top-loading machines, the needle plate should sit flat and flush with the machine bed. If the case feels loose or the plate is crooked, the bobbin will not feed evenly, and you may get skipped stitches or broken thread.
Also check that the bobbin itself is not overstuffed. If the bobbin is too full, it may jam against the case walls and refuse to spin. If it is too empty, the thread may slip off during sewing. A properly wound bobbin should be full but not bulging.
What to do if the bobbin is not feeding thread
If you start sewing and the bobbin thread does not appear on the back of your fabric, stop when ready. First, raise the presser foot — this opens the tension discs on the needle threader and allows you to pull thread freely. Gently pull the bobbin thread to see if it moves. If it does not move at all, the bobbin case may not be fully inserted, or the bobbin may be jammed in the case.
Remove the bobbin case and check that the bobbin spins freely inside it. If the bobbin is stuck, it may be overstuffed or inserted backward. Remove it, check that the thread unwinds from the top, and reinsert it. If the bobbin spins freely but still does not feed thread, the tension spring may be bent or damaged. On some Brother machines, you can replace the spring; on others, you may need to replace the entire bobbin case.
Frequently Asked Questions
Which direction should the bobbin thread unwind?
The thread should unwind from the top of the bobbin as it sits in the case. If you wind the bobbin and the thread comes off the bottom or side, the bobbin is wound backward. Rewind it so the thread spirals in the correct direction — usually clockwise when you look at the bobbin from the side.
Can I use a plastic bobbin instead of a metal one?
Brother machines come with either metal or plastic bobbins depending on the model. Check your manual or the bobbins that came with your machine. Metal bobbins are more durable and hold more thread, but plastic bobbins work fine if that is what your machine uses. Do not mix types — using the wrong bobbin can cause tension problems or jamming.
How do I know if my bobbin case is front-loading or top-loading?
Look at the front of your machine below the needle. If you see a small door or panel, you have a front-loading case. If there is no door and you have to lift the needle plate to access the bobbin, you have a top-loading case. Your machine manual will also state which type you have.
What if the bobbin case is stuck and will not come out?
Turn off the machine and raise the needle to its highest position using the hand wheel. This releases tension on the case. Gently wiggle the case side to side as you pull — do not yank it. If it still will not budge, check that there is no thread wrapped around the case mechanism. If the case is truly stuck, stop and consult your manual or contact Brother customer service.
Why does my thread keep breaking when I use the bobbin?
Thread breaks usually mean the bobbin is wound too tightly, the case is not fully inserted, or the thread is not threaded through the tension spring. Check all three. Also make sure you are using thread that matches your needle size — thick thread on a thin needle can break. If the bobbin case itself is bent or damaged, it can catch the thread and cause breaks.