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Pole Road Wheels
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 Posted: Wed Jun 4th, 2014 03:14 pm
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Herb Kephart
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Alwin

Michael is dead right. I was looking at making some and the fact that the spoke follows the inner rim shape means CNC  mill-- two operations--and with the curved spoke the program would have to be mirrored for the second side, and a nest made to hold the part in relation to the first side--then carefully cut the concave in the rim with a lathe (again with a nest).

I think that Jose is correct--lost wax would be the most practical.

Herb



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 Posted: Wed Jun 4th, 2014 07:56 pm
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Alwin
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Thanks for the comments everyone. I did some research on the net about lost wax castings. I will go anyway for 3D printing. I have to change my design a bit but that method is easier and cheaper, at least for me, I don't got any of the tools and materials needed for lost wax castings.

Alwin

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 Posted: Wed Feb 11th, 2015 02:58 am
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Garyshay
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Hi Alwin,
I assume I might be too late from your last post.
I would suggest you locate a 3D printing service bureau that will print these on a 3D systems Viper Si2 in high resolution mode (.003" diameter beam and 0.002" layer thicknesses) should be able to yield 0.020" thick walls & thinner edges using Accura Clearvue or Somos watershed resins..or similar)
Another option may be to find a source for Envisiontec's Micro printer. I believe the resolution may be even higher.
https://www.youtube.com/watch?v=3KO6XMLvgJQ

For a static model, either printer;s materials should suffice but for a powered model you will definitely need to go to investment casting.  Jewelery foundries may be a good source location.
 



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 Posted: Wed Feb 11th, 2015 06:39 pm
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Alwin
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Hi Gary,

It's not too late but this project is on a hold for now.
I keep your advice in mind. Thank you.

Alwin

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 Posted: Mon Sep 14th, 2020 02:23 pm
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Si.
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A nice photo from Google Images, of geared loco pole road wheels close up.  :thumb:


:java::mex::dt:


Si.




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 Posted: Thu Sep 17th, 2020 11:41 pm
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oztrainz
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Hi Alwin,
An off-the-wall suggestion.

If you haven't got your wheels yet can I suggest taking a look in the ship modelling area for capstan drums? These have a concave radiused outer edge that could be mated to dowels with a "close enough" matching diameter as rails. They could be available in a range of diameters that could be sutable for what you want.

Something like those at the bottom of the following link
https://www.cornwallmodelboats.co.uk/acatalog/amati_capstans.html



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