Sewing Machine Thread Keeps Breaking: Why and How to Fix It
Help! My sewing machine thread keeps breaking. This is a frustrating problem for both beginners and experienced sewists. If your thread keeps snapping while sewing, the issue is usually something simple, such as incorrect threading, poor thread quality, or a damaged needle. In this guide, you’ll learn 10 common reasons why sewing machine thread keeps breaking and exactly how to fix each problem. Follow this troubleshooting checklist to get your machine running smoothly again.
How to Stop Sewing Machine Thread Breaking (Quick Guide)
If your sewing machine thread keeps breaking, the most common causes are incorrect threading, a dull or bent needle, poor-quality thread, or incorrect tension settings. Thread can also break if the bobbin is wound unevenly or if lint has built up inside the machine. To fix the issue quickly, try this checklist:
- Rethread the sewing machine completely
- Replace the needle with a new one
- Check that the bobbin is wound evenly
- Adjust the thread tension
- Use high-quality sewing thread
- Clean lint from the bobbin area and tension discs
Most thread breakage problems can be solved with one of these simple adjustments.
Why Does My Sewing Machine Thread Keep Breaking?
Try this trouble-shooter’s checklist to stop threads from breaking and get your machine back on track right away. It’s a sure-fire approach to sorting out problems when the sewing machine thread keeps breaking, and you have to keep rethreading your machine.
Regular maintenance prevents many common sewing problems. For more fixes and diagnostics, see my sewing machine troubleshooting guide.
Here is a quick troubleshooting table showing the most common causes of thread breakage and how to fix them.
| Problem | Why Thread Breaks | Quick Fix |
|---|---|---|
| Incorrect threading | Thread is not seated correctly in tension discs | Completely rethread the machine with the presser foot raised |
| Bobbin wound unevenly | Loose or overlapping thread affects tension | Rewind the bobbin with even tension |
| Wrong needle type | Needle can’t penetrate fabric correctly | Use the correct needle for the fabric (stretch, denim, universal) |
| Bent or dull needle | Damaged needles shred thread | Replace the needle with a new one |
| Incorrect tension | Too tight tension snaps thread | Adjust upper thread tension gradually |
| Poor quality thread | Cheap thread frays and snaps | Use high-quality polyester or cotton thread |
| Lint or debris buildup | Lint blocks tension discs and bobbin area | Clean the machine regularly |
| Incorrect bobbin insertion | Bobbin spins incorrectly | Reinsert bobbin following machine guide |
| Fabric not feeding correctly | Extra stress on thread | Check feed dogs and presser foot pressure |
| Thread catching or snagging | Thread stuck in guides or spool | Ensure thread unwinds smoothly from spool |
💡 Quick tip: If your sewing machine thread keeps breaking repeatedly, the fastest fix is often changing the needle and rethreading the machine.
How to Stop Sewing Machine Thread Breaking
Here are the 10 main reasons for your sewing machine thread breaking repeatedly. With my machine, most common is number 4 which is poor quality thread. Run through this checklist to fix this common problem.
If you’ve worked through the checks below and still can’t identify the cause, my printable troubleshooting guide includes flowcharts and step-by-step diagnostic checklists to help you quickly isolate the problem.
1. Check Your Needle
Check that your needle is the correct size and not bent or damaged. (Sewing machine needle sizes). Also, check that it is the correct type for the fabric you are sewing. Stretch fabric needs stretch needles, while woven fabric should be paired with universal needles. There are also various specialty needles available, such as leather needles, denim needles, and topstitching needles.
2. Rewind the Bobbin
Look out for any thread that may be wound around the spool in the bobbin case. When your sewing machine thread keeps breaking, check for fluff and lint deposits that may interfere with the machine’s smooth operation. (How to clean a sewing machine) Double-check the bobbin and its casing, as often a bit of thread may be caught there, and if it has snapped off will affect your tension.
A bobbin needs to be wound evenly and tightly. Try replacing the bobbin, even if it looks ok. It is always best if the top spool and the bobbin are both the same thread type and thickness. If you must use a contrasting color bobbin, then at least make sure it is the same brand as the top spool. (How to wind a bobbin)
3. Rethread the Machine
Check you threaded your machine correctly. As a general rule, even if everything looks fine on the top and bobbin threads, do a re-thread. Admittedly, this may seem like a waste of time, but it does solve a lot of machine problems.
It is a bit like restarting your computer when it behaves strangely. If you re-thread the top spool, always redo the bobbin as well. (How to thread a sewing machine)
4. Check the Thread Quality
Did you use a quality thread? Getting top-branded thread makes a real difference if your sewing machine thread keeps breaking, particularly when you have difficult fabrics to sew, such as Spandex and Lycra. (Sewing thread types). Your thread should be the correct type for your fabric as well.
5. Look for Snags
Were there any knots or snags in the thread that could get in the way and cause breakage? Knots usually cause a one-off breakage. If your thread keeps breaking, it is likely to be something else.
If you’ve worked through the checks below and still can’t identify the cause, my printable troubleshooting guide includes flowcharts and step-by-step diagnostic checklists to help you quickly isolate the problem.
6. Clean the Throat Plate
Lift up the throat plate (the metal cover over the bobbin) and clean out bits of fluff. Look in your machine manual and see if there are other movable parts that could need a gentle cleaning.
7. Check the Throat Plate Condition
Make sure there are no nasty nicks on the plate that will affect performance. Whenever a needle breaks, there is a risk that you could put a nick in the plate, which will cause tension and thread breakage problems. These are generally cheap to replace, or a good sewing machine mechanic should be able to buff out any small nicks.
8. Stop Pulling
Remember to always keep the needle in the up position when you draw out the thread and pull the thread backward before cutting. Perhaps you are just pulling too hard.
9. Set the Correct Tension
Double-check the tension is right for the task and fabric. Checking the tension can be a bit of a test of your patience, but get out a scrap of fabric that is the same as your garment and try little changes until you get it right. (Sewing machine tension). Some front-loading bobbins have a tension screw to adjust on the bobbin case. The upper and lower stitches on your test piece of fabric should be even and neat.
TIME SAVING TIP: If you are using the same fabric regularly, write the correct tension on a scrap of fabric, so you have it handy next time.
10. Remember the Spool Cap
Check that you remembered to put the spool cap on. This is a plastic disk that normally goes on top of the top thread spool to stop it from flying off when you start sewing.
If you’ve worked through the checks below and still can’t identify the cause, my printable troubleshooting guide includes flowcharts and step-by-step diagnostic checklists to help you quickly isolate the problem.
Sewing Machine Thread Breaking FAQs
The most common reasons are incorrect threading, a damaged needle, poor thread quality, or incorrect tension settings.
Yes. If the upper thread tension is too tight, the thread can snap during stitching.
Most sewing experts recommend replacing the needle every 6–8 hours of sewing or after completing a project.
Pin for Later
Sewing Machine Thread Keeps Breaking – In Conclusion
If your sewing machine thread keeps breaking, the cause is usually something simple, such as incorrect threading, poor thread quality, or a damaged needle. By working through this troubleshooting checklist: checking the needle, rethreading the machine, cleaning the bobbin area, and adjusting the tension, you can quickly resolve most thread breakage issues.
Regular sewing machine maintenance also helps prevent issues before they start. Cleaning lint buildup, replacing needles frequently, and using high-quality thread will keep your sewing machine running smoothly and reduce frustrating thread breakage.
That should sort out the irritating “my sewing machine thread keeps breaking” question and frustration! After it is fixed, you’ll feel more like the Fairy Godmother than the Wicked Witch of the West!
MORE TROUBLESHOOTING ARTICLES:
- Sewing Needle Keeps Breaking
- How to Clean a Sewing Machine
- Sewing Machine Thread Keeps Breaking
- Sewing Machine Skipping Stitches
- Seam Puckering when Sewing
- Sewing Machine Manuals
- Sewing Safety Tips for Beginners
- Sewing Machine Troubleshooting
- Sewing Machine Tension
- How to Thread a Sewing Machine
Author - Luisa Clare
Luisa Clare is the founder of Treasurie, a sewing and crochet education platform offering step-by-step tutorials and printable patterns. With over 15 years of experience in dressmaking, pattern design, crochet, and craft education, she specialises in teaching beginners through clear, easy-to-follow lessons. Her tutorials and patterns are used by home sewists and crocheters worldwide to build practical skills and confidence. Learn more about Luisa and Treasurie.
Hi Hanifa, if it only happens when you have thick fabric try a thicker needle. And make sure the thread is of good quality.
My thread breaks when fabric is folded over more than one layer
No reversing shouldn’t make it break. Might need a service. Also check the throat plate and make sure there are no nicks that could cause the thread to catch.
machine sews fine in forward direction but when i use reverse, the thread cuts. Does reverse change the thread tension?
I appreciate that this post pointed out that a tangled thread is a sign that the needle is inserted improperly. My wife mentioned that her thread has been tangled up lately. I will ask her to have it repaired.
Thank-you! Thank-you! If I’d read another blog etc . . suggestion my tension was wrong, I was going to scream! My thread kept breaking and it was problem TIP #7: THROAT PLATE CONDITION- I’m slightly ashamed to say the hole the needle goes down through could have been used to cut would. BUT a little bit of very fine sandpaper and I am back in action!
Perhaps there is a problem with the machine tension in reverse. If changing thread makes no difference then it might be the machine. You can always skip the reverse and tie the ends.
I’m not sure about this one. Is your fabric really thick? Otherwise stop before the thicker layer and resume on the other side. Hand stitch in between.
My thread keeps breaking when the thickness of the fabric changes. That is it sews fine on a single layer of fabric but when I come to a section where the fabric is folded over (more than one layer of fabric) the thread breaks every time. I’ve changed needles and thread and it still happens.
Why does the thread break when I engage reverse?