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CHAIN-DRIVE ! - Components & Ideas For Miniature Drive Systems
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 Posted: Thu Apr 23rd, 2020 11:46 pm
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Si.
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" I would have liked to try the Hiroboy motorcycle chain "


Hi Tom  :wave:



If you want something that is designed to operate, as opposed to a 'dummy' chain ...  ???

... as far as I could tell, after DAYS of research, the Delrin(TM) chain is the ONLY real option.



It is also the only realistic option, as far as getting usable 'sprockets' to mate with it.

There is no such thing as a 'Fusee-chain' sprocket, as they don't exist ...  :us:

... & 'Hiroboy' don't offer usable sprockets, other than huge motorcycle style 'chain-rings'.  :f:



'Tamiya' do offer a very $$$ expensive 1:12 stainless-steel motorcycle 'genuine' roller-chain.

But same as the non-operating 'Hiroboy', don't offer usable sprockets, other than huge 'chain-rings'.





'Rolls Royce' $4!7 though I'm sure & it would have to be, at 10x the cost of Delrin(TM) !!





:brill:

I ended up, after all that, with some of the Delrin(TM) link-chain & smallest 8-tooth sprockets.

The intended use being, a just about acceptable attempt at this, in 1:35n2 scale.





With 'Grandt Line', 'Servo Link', 'Micro Mark' (all the same stuff, as far as we could tell) ...

... the appearance of the Delrin(TM) chain is WAY bigger than what the photo ^^ shows.



But I considered that the 'fun & funkyness factor' meant RIVET COUNTERS need not apply !

Having said all that, about 'prototype' chains being of 'Supermodel slenderness' ! ...





... No one seemed to tell this ol' B&W Victorian racing-driver !  :slow:





The 8-tooth Delrin(TM) sprockets ^^ I ended up with (1/8" & 3mm bore are available) ...

... are intended to be fitted onto 're-axled' 14.1mm dia. 'Hornby' HO/OO coach wheelsets.


Here are the 8-tooth sprockets, for a sense of size ... Quite BIG !  :shocked:





& the smallest 'Grandt Line', 'Servo Link', 'Micro Mark' (all the same stuff, as far as we could tell) chain.










The first RIVET COUNTER to dare say it's OVERSCALE ...

... will find  M.M.M.M.M.& M.Co.  doing a 'chain strength test' ... Around their NECK !!  :w:


Even more interesting stuff about CHAIN DRIVE ! can be found here :-

CHAIN-DRIVE ! - Components & Ideas For Miniature Drive Systems



:java: :moose: :dt:



Si.




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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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 Posted: Thu Apr 30th, 2020 07:31 pm
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Si.
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3 more Posts, copied over, from Toms  'Diesel Shay' Thread  in the 'On30' Forum.  L:  L: L:

Which may be helpful for 'Chain-Drive folks' in the future.  :old dude:



- - - - - - -



" Si.

Thank you for all the helpful info and for sharing your opinion on the chain options. 

I received the 'fusee chain' today and realized right away it wouldn’t serve my needs. 
As you said, no place for a sprocket since it’s really only one side of a chain,
and the one I got was so stiff it could never be operational in the way I want. 

Looking at the 'Hiroboy' website I did see one bike that had a smaller rear sprocket,
but even that looked like it would be huge for my Shay. 

So, yes, I crossed my fingers and ordered the Delrin chain from 'Micromark'. 
From your pictures it looks beefy but that’s what I want, at least to a certain degree. 

For this project my biggest concern is dismantling the crankshaft. 
Not real sure how to go about it but I’m sure a little research will turn up a technique.

Planning to replace the crankshaft with a straight shaft and mount one of the sprockets there. 
Another small sprocket will be mounted further up near the frame, out of sight,
so the gear driven wheels will be driving the chain. 

Tom "



- - - - - - -



" Si.

Your photo of the Delrin chain sprocket next to the wood ruler,
shows me the outside diameter is about 3/8” (0.375”). 

I held calipers up against my transfer case,
and that size sprocket would look good in its place. 

I think this chain is going to work OK. 

When I ordered the chain from 'Micromark',
I also ordered the extra sprocket package.

Should give me enough to work something out. 

I think the chain will look beefy in 1:48 scale,
which is what I want.

Tom "



- - - - - - -



Hi Tom  :wave:



Yes 3/8" dia. is about right, for the 8-tooth sprocket ...  L:

... & cos the teeth penetrate most of the way through the chain ...
... the overall dia. of 'sprocket + chain' isn't that much more than that (sort of).  :old dude:





For my use, you could say I see the chain 'side-on' primarily ...

... for your use, you could say you see it 'front-on' primarily.  :)


In your case 0.162" ^^ equaling 4.11mm wide ...

... which helps me visualize it, as I have loads of 4.1mm drill-bits knockin' about !  :)

So 1:1 size in 1:48 scale On30 ...  :brill:

... makes the chain  7 3/4"  wide.





Now the B&W Victorian racing-drivers chain, seen here ^^ at an oblique angle ...

... looks about the same width as his head !  :shocked:


I'm not going to argue about that being around 7 3/4" wide ! ...
... you know how much brains these racing-drivers have to fit in there !!  :dope:



If anyone can come up with a photo, of a 'sensible' locomotive chain, bigger than ^^ this ...

... I'll personally offer 1 years FREE Membership to Freerails, as a top prize !  :P



BTW ... I found a place on eBay in the U.K. that sells the Delrin(TM) chain by the inch ...

... & also sells any quantity of any size sprocket or bore required, very reasonably priced.  :cool:

So perhaps there may well be a similar supplier on U.S.A. eBay doing the same thing.



:java: :moose: :dt:



Si.




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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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 Posted: Mon May 18th, 2020 06:31 am
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Paul Napier
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Grant Morrell in New Zealand uses the Tamiya motorcycle chain,

for his On30 chain driven, Olly Smith rail tractors, like the twin cab above.


A local manufacturer makes brass sprockets for this chain.


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 Posted: Mon May 18th, 2020 07:30 am
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Cor V
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https://www.ebay.nl/itm/Delrin-Chain-Sprocket-Drive-System-for-4mm-7mm-16mm-7-8-Scales-S-O-SM32-45mm-G/161623046587?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

Another link.

Don't know if this one was already mentioned.


Cor




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Cor
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