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Singer 99 not feeding heavy thread.

Singer 99 heavy thread not picking up. When using normal polyester thread the machine works perfectly. But I got it to sew leather, and when I put stronger slightly thicker thread in the machine will only reliability sew at full speed, which is no use as I need to be precise and sew round corners etc. If I try and sew slowly the mechanism around the bobbin isn't catching the thread on the needle. I've tried with and without material and the feed is..... Unreliable. Change back to polyester thread, perfect again. I've tried both heavy polyester thread and my usual hypron 17lb fishing line that I sew with on my old hand cranked Chinese machine. Any help would be much appreciated Thanks

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Unfortunately, your domestic machine was not made to sew leather. It can probably sew lighter weight leather with a lighter weight thread. Your thread is most likely too heavy for the machine you are using so it is not able to pick it up properly.

Posted on Apr 19, 2017

  • 3 more comments 
  • Nunya Business
    Nunya Business Apr 19, 2017

    Thanks for the reply. While not designed for leather, it is quite capable of going through 5-6mm of leather. The machine will feed and sew it no problem, but only at high speed, at slow speeds it's missing the heavier thread. With normal thread everything is prefect, but the thread isn't really strong enough for my purpose......

  • Nunya Business
    Nunya Business Apr 19, 2017

    Catch 22........

  • R.A. Ellis
    R.A. Ellis Apr 19, 2017

    Yep, I use my old Singer to repair horse equipment. Even though it frequently has trouble piercing the fabric, I help it along with the handwheel, but I use 100% polyester thread so there are no problems picking up the bobbin thread.

  • Nunya Business
    Nunya Business Apr 20, 2017

    What weight thread do you use? If it's heavy enough for horse equipment should be ok for leather

  • R.A. Ellis
    R.A. Ellis Apr 21, 2017

    I just use polyester thread that I use for quilting. I think it's Isacord. Thin but tough stuff. Difficult to break with my hands.



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