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 Post subject: Home made fiber gears - anyone ever tried?
PostPosted: Fri May 25, 2018 1:46 pm 
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Victor O
Joined: Thu Apr 13, 2017 11:00 am
Posts: 65
Location: Nova Scotia
The hunt continues for a replacement gear, but a bit of searching here suggests that delrin might be a material to try.

This site sells rods that are exactly the diameter I need and a one foot rod would leave room for many, many errors :)

https://www.aircraftspruce.ca/catalog/m ... rinrod.php

Anyone ever done this?


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 Post subject: Re: Home made fiber gears - anyone ever tried?
PostPosted: Fri May 25, 2018 11:44 pm 
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Victor V
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Joined: Tue Dec 14, 2010 1:17 am
Posts: 2913
Location: Where there's "hamburger ALL OVER the highway"...
Do you have gear cutting machinery?

Bill


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 Post subject: Re: Home made fiber gears - anyone ever tried?
PostPosted: Sat May 26, 2018 9:43 am 
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Victor O
Joined: Thu Apr 13, 2017 11:00 am
Posts: 65
Location: Nova Scotia
I do not, but I figure if a guy can reproduce the Antikythera mechanism with just a file, I have a shot with one gear made out of plastic. :)


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 Post subject: Re: Home made fiber gears - anyone ever tried?
PostPosted: Sat May 26, 2018 11:15 pm 
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Victor V
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Joined: Tue Dec 14, 2010 1:17 am
Posts: 2913
Location: Where there's "hamburger ALL OVER the highway"...
burke wrote:
I do not, but I figure if a guy can reproduce the Antikythera mechanism with just a file, I have a shot with one gear made out of plastic. :)


Wow: I hadn't heard about that feat. Is there a link?

Bill


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 Post subject: Re: Home made fiber gears - anyone ever tried?
PostPosted: Sun May 27, 2018 6:59 am 
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Victor IV
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Joined: Fri Apr 06, 2012 9:38 pm
Posts: 1074
Location: Plover, WI
I used a black Delrin sheet to have gears made. McMaster-Carr is a good source. A custom gear shop, Edgerton Gear, used the material to make the gears. The precision of cutting the teeth is vital. Using a file may not get the necessary results.


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 Post subject: Re: Home made fiber gears - anyone ever tried?
PostPosted: Sun May 27, 2018 9:50 am 
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Victor O
Joined: Thu Apr 13, 2017 11:00 am
Posts: 65
Location: Nova Scotia
Lucius1958 wrote:
burke wrote:
I do not, but I figure if a guy can reproduce the Antikythera mechanism with just a file, I have a shot with one gear made out of plastic. :)


Wow: I hadn't heard about that feat. Is there a link?

Bill

Something I saw on PBS I think or maybe Discovery, but sometime ago and I'm afraid I don't recall the specifics.


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 Post subject: Re: Home made fiber gears - anyone ever tried?
PostPosted: Sun May 27, 2018 9:56 am 
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Victor O
Joined: Thu Apr 13, 2017 11:00 am
Posts: 65
Location: Nova Scotia
Phono-Phan wrote:
I used a black Delrin sheet to have gears made. McMaster-Carr is a good source. A custom gear shop, Edgerton Gear, used the material to make the gears. The precision of cutting the teeth is vital. Using a file may not get the necessary results.

BTW - this is only a plan C in case I absolutely can't find either the spindle or a reasonably priced N0. 175 motor with a decent gear. I would also look for Canadian sources for both the material and perhaps as you suggest a fabricator. Shipping often far exceeds any sensible amount when getting stuff made south of the border.


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 Post subject: Re: Home made fiber gears - anyone ever tried?
PostPosted: Sun May 27, 2018 10:41 am 
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Victor VI
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Needle Tins are Addictive
Joined: Fri Jul 09, 2010 8:32 pm
Posts: 3556
Location: Belmont, North Carolina
Antikythera Mechanism:
https://www.smithsonianmag.com/history/ ... 180953979/
https://www.youtube.com/watch?v=UpLcnAIpVRA
http://naturedocumentaries.org/9444/vir ... mechanism/

An illustration of the Antikythera geartrain is shown below:


Attachments:
Screen Shot 2018-05-27 at 9.36.37 AM.png
Screen Shot 2018-05-27 at 9.36.37 AM.png [ 2.83 MiB | Viewed 517 times ]
"The phonograph† is not of any commercial value."
Thomas Alva Edison - Comment to his assistant, Samuel Insull.

"No one needs a Victrola XX, a Perfected Graphophone Type G, or whatever you call those noisy things."
My Wife
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 Post subject: Re: Home made fiber gears - anyone ever tried?
PostPosted: Mon May 28, 2018 4:44 pm 
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Victor IV
Joined: Mon Aug 24, 2009 3:08 pm
Posts: 1937
Location: Harrison Township, MI
burke wrote:
The hunt continues for a replacement gear, but a bit of searching here suggests that delrin might be a material to try.

This site sells rods that are exactly the diameter I need and a one foot rod would leave room for many, many errors :)

https://www.aircraftspruce.ca/catalog/m ... rinrod.php

Anyone ever done this?



I guess I've come to the conversation late. What is the gear you're needing? Can you show a photo of it?


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 Post subject: Re: Home made fiber gears - anyone ever tried?
PostPosted: Mon May 28, 2018 6:17 pm 
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Victor O
Joined: Thu Apr 13, 2017 11:00 am
Posts: 65
Location: Nova Scotia
JerryVan wrote:
burke wrote:
The hunt continues for a replacement gear, but a bit of searching here suggests that delrin might be a material to try.

This site sells rods that are exactly the diameter I need and a one foot rod would leave room for many, many errors :)

https://www.aircraftspruce.ca/catalog/m ... rinrod.php

Anyone ever done this?



I guess I've come to the conversation late. What is the gear you're needing? Can you show a photo of it?


Here is the one I'm looking for:
viewtopic.php?f=9&t=35676
...and here [first and only answer to OP's question] is the little Paillard its out of:
viewtopic.php?f=2&t=33220
As mentioned there are still folks looking and this is a last resort, hail mary pass, if the last paillard fiber on earth was sold last year ... option :)


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