Working with a sewing machine
that is breaking thread can be very frustrating.
Needles are not that easily threaded and the last thing you
want to do is thread your machine 10 times to sew one
If your sewing machine is breaking thread, always remember to
check the easy things first.
- Change Your
- Using the instruction manual to
your machine as a guide, re-thread your sewing
- If your thread breaks when you first
start sewing be sure that you are pulling up the bobbin
thread before you start. You can do this by gently
holding the end of the needle thread and turning the
handwheel 1 full turn. When you pull the needle thread, the
bobbin thread should appear above the needle plate.
Pull the threads to the back of the machine and lower the
presser foot. Always be sure the needle thread
take-up is at its top position before sewing. If it
is not at the top position the take-up will rise when you
start, pulling the thread from the needle.
- Make sure your upper tension is not
set to tight.
- If the spool pin on your sewing
machine is mounted horizontally, be sure to use a spool pin
cap that is larger in diameter than the spool of
thread. If you fail to do this the thread will
get caught in the slit at the top of the spool and
cause your thread to break.
If these five suggestions do not
stop your machine from breaking thread, it is time to start
looking for damaged parts.
Damaged Rotary Hook or
When you are sewing, the needle thread
passes over the areas in red in the images below. If
there are burrs or rough spots in these areas, thread breakage
Using your instruction
manual as a guide, remove the shuttle from your sewing
machine. Inspect the shuttle, looking for
burrs, needle marks and rough spots in the red areas of
the image on the left. Use your fingernail to rub
across the shuttle point and around the shuttle. If
there are deep scratches, the shuttle should be
replaced. Otherwise use a fine sharpening stone to lightly file the
scratches and burrs. Then, using crocus cloth,
polish the areas you filed.
Use the same techniques as above on a
rotary hook, looking for damage in the red areas as shown on
the image to the right.
The needle plate on your sewing machine
can become damaged if the needle comes in contact with
it. To prevent this, never pull on the fabric as you are
sewing. Always let the machine feed the material.
Since both the needle thread and the bobbin thread come into
contact with the needle plate, it must be smooth and free of
needle marks or thread breakage will occur.
Burrs in this area are difficult to get
to, and the needle plate should be replaced if you are unable
to remove the burrs. You can take a thin strip of crocus
cloth and polish the needle plate hole, but be careful not to
remove too much metal or your machine will skip