Repairing a Tension Knob on a Singer Sewing Machine?

February 24, 2017

Singer 6105 Tension Knob Falls Off - fingers holding knobMy Singer 6106 thread tension knob is just falling out of the machine. There doesn't seem to be anything that holds it in place. Does anyone know how to fix this?



Gold Post Medal for All Time! 677 Posts
February 24, 20171 found this helpful
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The threads on the knob or the metal piece it screws onto are stripped. You need new parts.

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Ask a QuestionHere are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community or ask a new question.

May 11, 2021

Hi, I got a Singer 6212c SM with tension unit, like the one shown in your picture. I am having upper tension problems and seems I misassembled the tension unit. I used to see just 2 discs in my featherweight machine but this model has 3 discs, 1 plain plus 2 curved as in most Singer machines. I think the plain disc goes in between, in contact with curved sides of the other 2 discs, Am I right or there is a different configuration? Thanks in advance!


Silver Answer Medal for All Time! 440 Answers
May 23, 20211 found this helpful
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I think you have Tension Assembly For Singer 242 247 252 360 400 403 404 7105 5BB5184.
You're right, the flat disc should be between the two curved discs. See here how they are located and what the Tension Assembly looks like when assembled:

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April 28, 2020

I'm trying to sew using my Singer machine, but the thread is tangling badly underneath my fabric. The stitching on the top of the fabric looks fine, but underneath its a mess. The bobbin is the right way up, and I'm fairly sure it's threaded properly as I followed the manuals instructions.

I suspect the issue is the tension, as it feels the same whether I turn the dial up or down. Any suggestions on what to do would be appreciated :)


Bronze Post Medal for All Time! 105 Posts
April 28, 20200 found this helpful

If you are having an issue with the tension on the machine this could be a problem with the spring. In all cases I have encountered when sewing if the thread under the material is not correct it has to do with the way the bobbin is threaded. I would check the way you have threaded your bobbin and put it in the casing first.l Clean this area and add a drop of oil.


Do not add more. You may need to order a new unit for the tension if you have played around with it too much because in some cases it is too hard to adjust again or it will not hold if you do get it adjusted.

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Gold Answer Medal for All Time! 617 Answers
April 29, 20200 found this helpful

Sometimes the thread goes into a different gap or space, and if you move it, you're off and running.

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September 17, 2016

I have a Singer 9217. The tension has given me issues. I have taken it apart and brushed out dust and thread pieces. I've checked adjustments, but my tension lever feels loose.

I need to remove the plastic casing around the lever, so my husband can get behind it to do repair, but I can't figure out how to remove it.

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