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Bernette 134D overlocker

Hey I have a bernette 134D overlocker and the threads keep breaking. Have tried putting new thread even have had it in the shop and it seems to work for a few rows then it starts snapping again. Any ideas on what might be causing it. Have a top needle and bottom that keep breaking. Any ideas would be great thanks

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  • donandy Jan 22, 2008

    Hi I had tried all these things it ended up being one of the needles was postioned wrong and needed to be fixed using a gauge .... thanks for you help..will be back



5 Suggested Answers


6ya staff

  • 2 Answers


Hi there,
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Posted on Jan 02, 2017



  • 3 Answers

SOURCE: Bernina Bernette 600 Deco embroidery machine

It could be that there is a loose piece of thread, or some fluff which is obstructing the tension gauge. Try blowing around the theading area (or even run the hoover pipe near it to see if you can **** it out). I cleared mine by folding a piece of non fluffy material and rubbing gently between the tension dial and machine.

Good luck

Posted on May 22, 2008



  • 1116 Answers

SOURCE: I have a 3/4 thread 234 model Bernette overlocker,

Newcastle where?

In the US, a sewing machine repair service can do the work - a Bernina tech would be better.

Service starts at about $100 plus any parts that have to be replaced.

If you go to the Bernina website, there should be a dealer locator option.

Posted on Mar 20, 2010



  • 107 Answers

SOURCE: Threading of Bernette overlocker 004D?

You could try to find the manual on eBay

Posted on Jul 01, 2010


  • 10 Answers

SOURCE: how do i reduce the

Adjust the thread tension holder, and see how that works out, the more twisted in it is, the closer the stitches will get :)

Posted on Oct 28, 2010

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1 Answer

I got a bernette 134d overlocker and the Nr 3 thread keep on breaking. What's wrong?

Most often, it is misthreading. Remove all the threads from the machine. Then rethread each thread in the order specified and verify the thread path is correct for each. Also, when threading the tension mechanism, give each thread an extra little tug to make sure the thread is seated completely.

Oh yes, very IMPORTANT. Always raise the presser foot when threading the machine!!!

FWIW, when a thread breaks, trying to rethread that one thread will not resolve the issue because it is being threaded out of order. If rethreading the one thread doesn't work the first time, just bite the bullet and rethread every thread.

The other possibilities are the tension is too tight, poor quality thread, or a burr somewhere in the threading process of that thread is snagging the thread.

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Adjust the thread tension holder, and see how that works out, the more twisted in it is, the closer the stitches will get :)

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