Sewing machine accessories needed

I watched a video of the fingers being used. The two on the left have two holes which did not appear to have any function. Diana, let Frank know if these can be omitted. They are oblong holes so not as easy as just drilling.

I think many folks did not offer to help since this is thin sheet metal work and not easy for many of us. For example, I do not have the tools to easily cut of form thin pieces of metal. My hand held hacksaw may cut, but also bend the metal. My hand held shears may not be able to cut.
 
Diana can you provide an accurate measurement of the thickness of the material. I make replacement parts for old mechanical clocks.

David
 
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Diana can you provide an accurate measurement of the thickness of the material. I make replacement parts for old mechanical clocks.

David
I have a cheap caliper from harbor freight. It gives me 0.5 mm . Years ago I did antique clock repairs . Wish I had known you then!
 
I watched a video of the fingers being used. The two on the left have two holes which did not appear to have any function. Diana, let Frank know if these can be omitted. They are oblong holes so not as easy as just drilling.

I think many folks did not offer to help since this is thin sheet metal work and not easy for many of us. For example, I do not have the tools to easily cut of form thin pieces of metal. My hand held hacksaw may cut, but also bend the metal. My hand held shears may not be able to cut.
The holes could be round as they help guide the embellishment under. The needle as it is sewn down.
 
I have a cheap caliper from harbor freight. It gives me 0.5 mm . Years ago I did antique clock repairs . Wish I had known you then!

Ok Diana, I think I will try and help. My suggestion is for you to mail me the one that you think is most desirable and in demand. I am not sure I am into a production run or 30 each, but that will depend on how complicated the part ends up being.

You can start a private conversation with me and we can work out the details.

David
 
Don't think I will be making 30 or each but can make a few. Diana sent me a sample and I just finished the prototype. Goofed on the length of the one thread guide, but apparently that isn't critical.

The one with the brass tube is the prototype.
prototype beside original.jpgother side of prototype.jpg

David
 
Well we have made a few more of two different diameter feed tubes....1/4" od and 5/32" od, but what ever they used had a wall thickness of 0.011".

So not sure if anyone out there has any need to make these or gets a request. I am including a dimensioned drawing of the main sheet metal body.

Now with full transparency, I am an electrical guy and not a mechanical metrologist, so my drawing may not meet ISO Standards.

two sizes finished.jpgmain body layout.jpg
 

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Don't think I will be making 30 or each but can make a few. Diana sent me a sample and I just finished the prototype.

Looks great; the measured drawing could easily turn into a CAD prescription, for robotic
laser-cutting. Sheet metal laser-cut production is amazingly easy (and relatively inexpensive)
to contract out, in few-dozen quantities. Tumbling could handle the 'radius' prescription.

Small to medium batch production might be less of a chore than hand-crafting a single was.
 
Just to keep this thread updated. While I am not a "tin banger" I felt I should try and help Diana, so far all is good and now am working on the flat ribbon feeders. Just finished the 1/4" ribbon feeder. The original was made in one piece and folded over. We made it in two parts and silver brazed the upper "U" shaped piece to the support.
The far right one is flipped over to show the other side.
1-4 inch feeder fingers.jpg

This has been fun so far.

David
 
.....
Now with full transparency, I am an electrical guy and not a mechanical metrologist, so my drawing may not meet ISO Standards.
As long as it conveys the critical details who really cares if it doesn't meet standards?
If someone were to critique it, then they really need to get-a-life.
The drawing looks find to me. I can use it. In my opinion - after (40) years drafting - that is all that matters in this type of situation.
Now if you were to see one of my electrical drawings, you might roll your eyes. . . :grin:
 
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