Singer 20U-125C User Manual (English)

Questions and Answers:

J
Jerry HamiltonAug 13, 2025
Why does the needle thread keep breaking on my Singer 20U-125C?
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  Lisa RodgersAug 13, 2025
  The needle thread may break due to several reasons. Ensure the machine is properly threaded and the needle thread tension is correctly adjusted. Remove any lint or fluff from the thread guides or tension disc area, bobbin case, and hook. Check if the needle is bent, blunt, or incorrectly inserted; replace or re-insert as needed. Verify that the needle size is appropriate for the thread and fabric, and try changing the thread if it's of poor quality.
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Joy WhiteAug 17, 2025
How to fix skipped stitches on Singer 20U-125C?
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  davidchavezAug 17, 2025
  Skipped stitches can occur if the needle is not inserted correctly, is bent, or has a blunt point. Ensure the needle is properly inserted or replace it with a new one. Also, make sure that the size of the needle and thread are suitable for the fabric and that the threading is correct.
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Brooke BurkeAug 20, 2025
What to do if bobbin thread breaks on Singer Sewing Machine?
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  Christina VasquezAug 20, 2025
  If the bobbin thread breaks, check if the bobbin is threaded correctly and untangle any thread from the bobbin case and hook. Adjust the needle and bobbin case thread tension, and ensure the bobbin rotates smoothly by checking if the bobbin thread is wound correctly.
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rachel66Aug 25, 2025
What to do if my Singer 20U-125C Sewing Machine fails to start?
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  hamiltonmatthewAug 25, 2025
  If the machine fails to start, ensure the electrical plugs are properly connected and turn on the power switch. Also, check that the power and light switch are turned on and connect the plug to a power source.
K
kirkaustinAug 28, 2025
How to fix fabric not feeding through Singer Sewing Machine?
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  Aaron RhodesAug 28, 2025
  If the fabric fails to feed, lengthen the stitch length by adjusting the feed regulating dial and adjust the presser foot pressure properly.
T
Teresa WarnerSep 1, 2025
What to do if the needle breaks on my Singer 20U-125C?
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  Michael JonesSep 1, 2025
  A needle can break for several reasons. Make sure the needle is installed correctly and is not bent. Replace it if it is. Also, ensure you're using the correct needle size for the fabric and tighten the needle clamping screw. Avoid pulling the fabric while sewing.
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masonwestSep 4, 2025
Why is my fabric puckering when using my Singer 20U-125C?
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  bgibsonSep 4, 2025
  Fabric puckering can occur if the needle threading is incorrect, the needle point is blunt, or the thread tension is too tight. Correct the needle threading, replace the needle if it's blunt, and properly adjust the needle tension.
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nharrisSep 8, 2025
How to reduce rotating heavy noise in Singer Sewing Machine?
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  raymond53Sep 8, 2025
  To reduce rotating heavy noise, remove any lint or fluff from the feed dog and the rotating hook.

Singer 20U-125C Specifications

General

Type	Industrial Sewing Machine
Stitch Type	Straight, Zigzag
Operation	Manual
Needle Threader	No
Model	20U-125C
Buttonhole Styles	4-step
Presser Feet	zipper, buttonhole
Included Accessories	Needles, bobbins, screwdriver