Why thread breaks
One of the most annoying things that can happen in the middle of a project is thread that keeps breaking on your sewing machine.
Here’s a video that explains what’s going on and what to look for to fix it. A simple checklist to follow is below the video
Quick summary of why thread breaks
Thread breaks because:
- it is being pulled harder than it is designed to withstand, or
- it’s been worn down and become weaker.
How thread gets pulled too hard
- Threaded incorrectly. Rethread the machine.
- Thread is getting caught up on something outside the thread guides. Watch the thread spool and guides as you sew to look for problem areas. Make sure cross wound spools are on a horizontal spool holder and straight wound spools are on a vertical spool holder (see video for details)
- If you are using a specialty thread, consider lowering tension. Tension is unlikely to be the problem for regular sewing thread. If you are unfamiliar with changing the tension on your machine see this explanation – Sewing Machine Tension
How thread gets worn down
- The thread gets pulled back and forth through the needle and some of the lower guides many times before it becomes a stitch. Change the needle.
- Rough spots on the thread path can catch the thread. Feel for rough edges in the thread guides, the needle plate, the bobbin and the hook. Check with your manual before using emery paper (fine sandpaper) to sand down the rough spots in order to avoid voiding your warranty or doing damage (especially to the hook).
- Specialty threads are often more delicate. Use a needle designed for the thread you are using. These needles usually have bigger eyes so they are easier on the thread.
