Question about Kenmore Drop-In Bobbin 505S-21BH Mechanical Sewing Machine
My bobbin tension seems to be off--I keep getting a balled up mass of thread on the bottom of my fabric. I have gone through the manual and looked all over the machine and can't find anywhere to adjust bobbin tension. I am positive my machine id threaded properly--the take up lever in particular---HELP
I discovered the same problem. What I figured out (after having the machine "repaired" several times) is that it seems as if the bobbin type may be the suspect. I started looking closely and it seems as if I have 2 different types of bobbins. So, I tried both types. Since I don't know the bobbin number(s), you will have to put up with my description .... the bobbin that is flat, top & bottom, seems to bunch up. The bobbin "bounces" when I sew. The bobbins that are rounded on the top and bottom don't seem to "bounce" and it doesn't bunch up the lower thread. Now, I have read my manual front to back and it does not say what bobbin type or number to use. So, if anyone knows, it would be a great help. I am assuming the correct bobbin is the "class 66" bobbin. Does anyone know for sure?
Posted on Apr 29, 2011
If You have a drop in bobbin you will have to remove the hook and adjust the tension, however try adjusting the top tension before you remove the hook.
Posted on Aug 06, 2009
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Posted on Jan 02, 2017
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