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On18 Trucks Anyone ?
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 Posted: Wed Mar 27th, 2019 05:03 pm
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Michael M
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Could Minitrains be adapted to be used in On18? 

http://www.central-hobbies.com/products/minitrains.html



There might be some helpful info here:

https://model-railroad-hobbyist.com/node/21264





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 Posted: Thu Mar 28th, 2019 12:13 am
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W C Greene
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While these aren't On18, they are On20 and the pix show how good they look under O scale narrow gauge cars.





Precision Scale HOn3 WSLCo arch bar trucks under a Grandt Line On2 Gilpin ore car.





PSC HOn3 passenger car trucks under a Caso On18/On20 passenger coach.





And ancient Central Valley HOn3 arch bar trucks under a scratchbuilt On20 caboose.
Any of these trucks could be reguaged by simply tapping the wheels in a bit on the axles and using the same stock bolsters.
On18 is 9MM gauge and HOn3 is 10.5MM gauge, and the trucks look fine in this scale.
Tom's trucks look great and I would imagine that all you need then are some nice N scale wheel sets.
Remember that the N scale wheels are going to be a bit smaller than the HOn3 wheels would be but who's gonna know? 
One thing, I would try to get metal wheel sets, not plastic...much better in the long run.

                   Woodie




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 Posted: Thu Mar 28th, 2019 04:18 am
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tebee
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I ended up making my own wheels, because I thought N gauge ones looked too small.

Mine are in the 8-9.5mm range, whereas the biggest N gauge ones I could find were 6.5mm.

I had originally intended to use KB Scale wheels made for O14 scale,
but they went out of production just after I designed these trucks.

I still use 20mm long axles,
which means I could make wheels in 9mm, 10.5mm, 12mm, or On2 gauges to fit these trucks.

Some of the earlier HOn3 wheels will fit too.




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 Posted: Sun Mar 31st, 2019 10:18 pm
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Stan S
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Thanks Larry, good thought.








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 Posted: Tue Apr 2nd, 2019 06:14 pm
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Stan S
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Seems like a standard HO scale truck side frame and wheel diameter looks close to right for an On18 model.

I'm gonna try to shorten the axel of a Kadee brass wheel set.

1/8" brass tubing has an inside diameter that's within a few thousanths of the axle O.D.

I think I can cut the axle, shorten the halves and secure them together with a short length of the tubing.

Then I just need to shorten the bolster a bit...

Call me crazy.




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 Posted: Thu Apr 4th, 2019 11:47 pm
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Stan S
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I made what I'm gonna try to use as a On18 truck.

It's a Tichy HO scale standard gauge truck, made narrower by shortening the bolster.

I cut apart a Kadee brass wheel set and rejoined the shortened axle halves with brass tubing.

The I.D. of 0.125" tubing is almost a perfect fit, just a couple thousandths big.

The axle looks too big around, but it will be black and hard to see...







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 Posted: Thu Apr 4th, 2019 11:47 pm
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Stan S
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another shot:







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 Posted: Fri Apr 5th, 2019 01:58 am
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W C Greene
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That will work. Very cool.

Woodie






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 Posted: Fri Apr 5th, 2019 02:59 pm
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Stan S
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Looks like about 18" diameter in O scale, the HO wheel is about 0.380", math was never my strong suit though.


Here's the comparison, Left to right:

N, HOn3, HO, HO narrowed to 9mm.







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 Posted: Fri Apr 5th, 2019 02:59 pm
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Stan S
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Another angle.







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