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Stan S
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So, what do people use for trucks for scratch built On18 rolling stock?

Stan




W C Greene
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Howdy Stan...you might use re gauged HOn3 trucks for your On18.
I built On20 for some years, using HOn3 trucks and MDC HOn3 Shays and found that the guys who built in that scale/gauge,
were using the HOn3 trucks which were pretty much right on for smaller narrow gauge types in O scale.
It might seem to be a simple matter to just press the wheels in a bit to work on N gauge track (10.5MM to 9MM).
The available N scale trucks would tend to look rather small in O scale anyway.
If the old MDC HOn3 locos were still available and inexpensive (20 years ago), I might suggest building On20.
There is or maybe was an On20 Yahoo group that might be operating and have better ideas.
Narrower is cooler, please let us know how things are going.

Woodie

***An idea-check out TeBee (Tom Bell) at SHAPEWAYS,
he might have something that would work or perhaps make a run of On18 truck frames...
I just happened to think of this. He's also a member of Freerails...check it out.


Michael M
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Facebook has a On18 group.

Nice Guy Eddie
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Is there anything Facebook doesnt have ?

Sounds like I can retire soon then if Facebook has everything

Lets all post on Facebook from now on

It will save me a lot of work


:f:


Eddie


tebee
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I did this range when I was planning to built my South American themed On18 line.


https://photos.app.goo.gl/bfPQoJypLFgLzCeB3



W C Greene
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I knew Tom would have something proper!

Woodie

Stan S
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Thanks Woodie-

Yeah, the N-scale trucks look too small.
I agree the HOn3 trucks look too small as well, but it might be the only easy choice.

I would really like to find a way to create O-scale size wheels
(like 3/4" diameter to represent 36") gauged to work on On18 (HOn30).

I've been looking on Shapeways,
there's a few people making some trucks (Tebee included)
but they all seem to be HO-ish size (or full-size standard gauge O scale)

The whole world of wheel sets/side frames/trucks is hard to decipher.

It would be great if someone would make a narrow-gauge truck/wheelset in O scale for 9mm gauge.
The backwoods/critter/mining/logging crowd would rejoice.

Seems like there's a lot of On30 modelers out there who are also doing On18 areas on their layouts.

Stan

Stan S
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Those are cool, do you make them available?

What's the wheel diameter?



tebee
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I have a few in stock,
not sure if I've ever put them onto Shapeways but can do.

Wheel diameter in the pics is 9.5mm - about 18 inches.
Around 16 inch + or - 4 inches is typical prototype diameter.
 
Larger wheels will not go round tight curves,
which is why you typically use narrow gauges.


Tom


Larry G
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IF you could find some of the old AHM HOn30 four wheel tram cars,
they could possibly work for On18.

Swap meets and train shows would be good places to look for them.

BIG CITY HOBBYS offered them,
don't know if they still do.

Larry G


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



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


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.


Stan S
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Thanks Larry, good thought.






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.


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...





Stan S
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another shot:





W C Greene
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That will work. Very cool.

Woodie




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.





Stan S
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Another angle.





Stan S
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Great looking cars Woodie!




Stan S
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Michael M wrote: 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


Yeah, gotta love Dave Meeks work :-)


Stan S
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Bought a pair of "real" On30 trucks from San Juan Car Co.  K-206-30

Not impressed.

The bolsters are sized for On3,
so the included On30 wheel sets don't line up with the brake assembly,
they look awful.

The bearing end caps don't fit into the sideframes either,
their mounting posts are too large.

All-in-all I can't recommend these.

:-(

Stan





John Teall
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I just use what i have left over from my accumulation of N-scale std. gauge.

For the imaginary era and world that i model,
plus with the overhang, they're not really all that noticeable.

One thing i would like to do though, is go back to the old Rapido type coupling,
with their wider gathering range then the more to scale of N-std. gauge couplers,
that when i was in N-std. gauge i ended up replacing almost all of them with.

Not sure what i did with all of the ones i had. i can't believe i just tossed all of them.
that's not like something i would do. but they do seem to be AWOL.



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