Why sewing machine thread keeps breaking – 8 causes and fixes

Why sewing machine thread keeps breaking

If you are a sewist, you may encounter thread-breaking problems. That is why you have come here to find out Why sewing machine thread keeps breaking and you need fixes.

So without further ado, let’s start… 

Why sewing machine thread keeps breaking and How To Fix This Problem

1. Faulty Needle

Sometimes when you use a sewing machine needle for too long without changing it, its hole loses smoothness. That is why when you thread your sewing machine; the sharp needle EYE will break the thread. 

Moreover, when sewing with bent needles, the thread passing the eye of the needle will be bent and then break due to force. 

You can fix it at home. You only need to check your needle; if you find a problem, then consider changing the needle. My recommendation is that you replace the needle every 8 hours. 

2. Needles Not Inserted Correctly

When you insert a needle wrong, your sewing machine thread will ultimately break in most cases. 

But make sure when the needle is not inserted correctly, two issues will occur: thread breakage and needle breakage because the needle will hit the needle plate. 

Insert the needle correctly following the user’s manual, then firmly clamp the needle holder so it does not fall again.

3. Inappropriate needle type

When you don’t use the exact type of sewing needle, then it may not be able to penetrate through the fabrics easily. As a result, the thread will tear apart due to extra pressure. 

For example, if you want to sew leather, make sure to use a leather-specific needle; this will save the thread from breaking. 

4. Uneven Thread Tension and Wrong Thread

Your sewing machine thread can break if the tension is too tight or loose. If the thread is tightened, the top thread will die, but you will lose the stitches if the thread is open. Consider the fabric type and the user’s manual when choosing thread tension. 

Adjust the sewing machine thread tension according to the material’s type and follow the user’s manual


Your sewing work will be more accessible if you thread your machine correctly. This is because incorrect threading in the wrong direction or using an incorrect-sized spool cap will undoubtedly break the thread. 

So to avoid this issue, unthread your sewing machine and reread it while following the user’s manual. 

5. Using Low-quality Threads

Using low-quality threads means threads with poor fibres which will break frequently. Additionally, low-quality threads generate excessive fibres in the bobbin resulting in the bobbin jamming. So make sure you always purchase high-quality type of sewing threads made from solid materials.

6. Uneven Bobbin Winding

When you wind the bobbin too tight or loose, the thread may break due to extra tension, or machines will make skipped stitches due to open winding. The bobbin should be wound evenly clockwise and without knots, not zigzagged.  

If you teach children sewing, instruct them to wind bobbins properly right from the start so they can avoid mistakes. 

7. Using The Wrong Bobbin

There are different bobbins for numerous sewing machine brands, so the thread may tear apart if you use a bobbin incompatible with the sewing machine. Also, use an equal-sized bobbin and a bobbin case and holder so that it rotates freely; otherwise, the thread will break due to force. 

The best and easiest solution to this problem is to use a compatible bobbin with your sewing machine so that the bobbin can rotate freely. 

8. Imbalanced sewing machine speed

Nowadays, most sewing machines available on the market are superfast and can make around 600 to 1000 stitches per minute. So try to be in this range; if you go above it, then due to more speed, the machine will break threads frequently. 

Was this article helpful? If you need further details or other articles related to sewing machine issues, then common below. Thanks…