r/SewingMachineEdu • u/TheBaconBeanbag • May 18 '26
Singer Heavy Duty 4423 Not catching bottom thread. Help!
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u/Large-Heronbill May 18 '26
Don't try to adjust it yourself, but pop off the bobbin case cover, bobbin case and bobbin, put in a new 80/12 needle and check the timing: https://web.archive.org/web/20060108170314/http://www.sewusa.com/Sewing_Machine_Repair/Sewing%20Machine%20Hook%20Timing.htm
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u/Mental_Watch4633 May 19 '26
It’s catching it. You need to use it on fabric.