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Pole Road Wheels
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 Posted: Sat May 17th, 2014 03:48 am
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W C Greene
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Yep, 3D printing would be a way to make the pole loco wheels but I would (if I was building a model) make the wheels from nickel silver so the treads would be polished like they would have been running on peeled log track. Maybe steel also, but something that could look like metal. Now, who is going to build one of these beasts? Don't be looking at me...I am just a troublemaker.

Woodie



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 Posted: Thu May 29th, 2014 08:48 pm
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Alwin
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Designed and ordered some wheels today. I let them 3D printing. For the metal look I can use an metal color paint. Never used that before so I don't know if the looks of the paint are reasonable but we'll see.

Wheels for the tractor:



It looks like the right flange is higher but its not. Don't know why it showed up that way.

And a bit different design for some carwheels. These are also a bit smaller in diameter. I ordered 8 of them for 2 cars with 2 axles.




It can take two weeks before I have them so no update soon.

Alwin

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 Posted: Fri May 30th, 2014 09:15 am
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Alwin
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Recieved a mail from shapeways. They couldn't print this designs. It does not meet the required minimum wall thickness.
It has to be minimum 0.7mm (about 0.03"). The flanges ends in a thickness of zero, the spokes have a thickness of 0.5mm (0.02").

I'm not sure if I can change the design such that it is workable for a 3D printer.

Alwin

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 Posted: Fri May 30th, 2014 09:53 am
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tebee
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What scale are you doing these in?

The tapering off at the edge should not be a problem, I have many things that do this, though you do have to be aware it may end up slightly smaller than intended if you do this.

Tom

Last edited on Fri May 30th, 2014 11:11 pm by tebee



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 Posted: Fri May 30th, 2014 10:54 pm
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Alwin
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Hi Tom,

Thanks for your reaction.
It's gonna be O scale. I thought the edges would also be a problem but if not than I only have to change the spokes. I think I can live with that. Some 3D designing time again.

Alwin

Last edited on Fri May 30th, 2014 10:54 pm by Alwin

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 Posted: Sat May 31st, 2014 09:12 pm
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mabloodhound
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Yup, the spokes wold be the reason for the reject....unless you go to a different material, like FUD which allows a thinner wall.   I hope you combined these in an array so you don't have to pay for each one separately.



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 Posted: Sat May 31st, 2014 11:24 pm
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Salada
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Alwin,

I've been away travelling for a month so I'm not up to date with the Freerails news.
Have you not got access to a lathe ? A round nose tool would form your tread shape in brass, steel etc, then solder in the spokes.

Regards                          Michael

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 Posted: Sun Jun 1st, 2014 10:16 am
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Alwin
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@ Dave: I could go for a other material but that's also more expensive. I don't want to spent much money on this so I redesign the wheels with some thicker spokes. The array is a good one, to be honest I haven't done that the first time but I can do that now.

@ Michael: I don't know anyone with a lathe. I asked someone I found on the net who offer to mill things. But he wouldn't / couldn't make them. I send him the design with the spokes so that is not easy to make however he had a cnc milling and lathe machine. I never worked with those but I think those machine could make something like this.

Alwin

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 Posted: Sun Jun 1st, 2014 11:58 am
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pipopak
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What about lost-wax castings?. Jose.



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 Posted: Tue Jun 3rd, 2014 09:37 pm
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Salada
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Alwin,

Having looked more closely at some (poorish quality) photos of pole track wheels I think a lathe would not be much use. I can see several severe machining problems if trying to use a standard, non CMC, machine. It could be done but it would take a wholly ridiculous amount of time per single wheel. Sorry, no good news.

Regards              Michael

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