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pgf

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Reply with quote  #1 
I've had a New Home bobbin with a brass end piece that kept falling off for some time now.  Someone on the treadleon list asked about how to fix such a thing, which gave me the round tuit to finally fix mine.  So I took a few pictures to help with the explanation, and wrote it up on my blog.

The short version is:  hit the brass cap with a hammer, to distort the hole so it doesn't really fit the shaft anymore.  Then you can press-fit it onto the shaft again.  But of course I didn't hit it directly with a hammer -- the full version is here:
   https://projects.foxharp.net/sewing_machines/#reattaching-a-loose-bobbin-end

paul


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jpeg bobbin_fix_2.jpg (105.90 KB, 10 views)


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OurWorkbench

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Reply with quote  #2 
Nice job. I have one question, though. How would you handle a long bobbin that had nubs on BOTH ENDS rather than the one that has a hole in one end?

Janey

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pgf

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Reply with quote  #3 
Janey, I'm not sure I understand.  I've never seen a long bobbin that didn't look like the one in my pictures.  Two brass caps, with a hole in each, pressed onto a steel shaft.

paul

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OurWorkbench

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Reply with quote  #4 
Okay, maybe I don't understand. From the picture it looks like you put the good end in the washer. If you hit the brass end that you just reduced the hole in, I think that trying to hammer that end would deform the brass part. I would think that it should be the other way around so the steel shaft can be hit or washers on both ends?

Janey

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pgf

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Reply with quote  #5 
No -- it's as you suggest it should be / should have been: I set the end I was working on, which had been loose, on the washer.  I tapped on the good end of the shaft with the hammer, driving the shaft through the was-loose-but-now-tight brass end.  Does that make sense?   I'll take a look at the text to see if I can make it more clear.

paul

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