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CHAIN-DRIVE ! - Components & Ideas For Miniature Drive Systems
 Moderated by: oztrainz Page:  First Page Previous Page  1  2  3  4   
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 Posted: Fri Apr 21st, 2017 08:04 pm
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oztrainz
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Hi all,

Be very very afraid....Jose is having ideas


FYI - A size comparison, the larger-sized Tamiya ladder chain in their Educational range

http://www.tamiya.com/english/products/70142chain_sprocket/index.htm

(as used for the under-track haulage on the Corrimal Incline)


and the Servo-Link chain (as used for the drag chain elevating conveyor on Corrimal)

http://servolink.com/sprocks.htm

for information on this smaller chain.





The elevating conveyor has yet to make an appearance here on the Corrimal thread,

but it can be seen in test run mode at

https://www.youtube.com/edit?o=U&video_id=ciV-aSDPkfM

and the Tamiya ladder chain with 10 mm diameter magnets attached to a link.





Just another 2 chain drive options that are known to work.




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John Garaty
Unanderra in oz
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 Posted: Sat Apr 22nd, 2017 12:49 am
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Si.
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Hi John :wave:


Thanks for the pix. :bg:


I'm guessing that the large Tamiya chain is made of Delrin(TM).


How did you fix the magnets to it ?


I haven't tried gluing Delrin(TM) ...


... except maybe some small Grandt-Line parts, years ago.


Got any advice ?


:bg:


Si.


Bob ... The monorails look AWESOME !


Gonna have to ask you a couple of questions on your drive ...


... l a t e r



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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: Sun Apr 23rd, 2017 02:06 am
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oztrainz
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Hi all

The smaller Servo-Link chain is acetyl and the larger Tamiya chain is Delrin or similar.
Both can be glued but there as some provisos...
So far the best results have been obtained with 2 part super-glues.
These have a primer and the glue.

BUT...

The bond is brittle and any sharp sideways impact will shear the bond.
In a straight pull situation the bond appears to be OK. 
The results obtained with solvent type glues for styrene were disappointing.
The 2 contact adhesives we tried were unsuccessful. 

BTW - if you try to glue anything to chains like these,
ensure that you de-point your sprockets so that you don't push off the bit that you have glued to the chain.
We learned this one the hard way.




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John Garaty
Unanderra in oz
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 Posted: Fri Jun 30th, 2017 04:31 am
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bobquincy
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Back to belt drive:

I have sold about 12 belt drive chassis and complete conversions in the past year, all of these are 2 stage reduction.
They run at a high speed (about 1 foot per second) and while low speed operation is OK it is probably not good enough for a train.
I originally looked at 3 stage reduction but shelved it due to complexity.

Well, now after a year of designs it does not look that difficult so I un-shelved it and am about to order 3D prints to make it work.
I know there is a long way from drawings to a working train so this is probably not the final version but it looks good.

Final drive is dual belts for improved power capacity.
My typical motor is a R.C. car motor so that would be replaced with something milder.







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 Posted: Wed Mar 21st, 2018 04:27 am
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Si.
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The Patented Davidson Chain.


Used on some New Zealand 'Bush Tramway' locomotives.





Devised by George Davidson and patented.

The chain was so made that all loadings were not carried on the pivot pins, but by shoulders machined into the links.

In the original chain, sprocket wheels used were of the flat or single disc type with teeth at every link (i.e. on a pitch of 4).

It was necessary to adapt the chain for use on the bush lokeys so that misalignment could be accepted.

So the sprocket wheels were a double-flanged type with the chain run between them,

and the teeth protruding from the bottom of the groove into every second link (i.e. on a pitch of 8).



:brill:




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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: Fri May 11th, 2018 01:12 am
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Si.
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Another potentially interesting chain, not mentioned before, is this 0.1475" pitch one :-





It has a roller-pitch slightly larger than the 0.1227" pitch 'Delrin'(TM) type already mentioned.  L:

The sizes are really quite similar, but in fact this ^^ one is a tad bigger. 



It is precision made, out of stainless-steel & is FANTASTICALLY expensive !

You can find it on the Net, by searching for it's pitch, of 0.1475"

It seems to be 1 of 2 different sizes of tough stainless-steel chains ...

... for large-scale professional R.C. racing motorcycles.  :shocked:



It might be of interest to someone with a large-scale loco, who needs TOUGH !  :mex:




:dt:



:!:



Si.




____________________

' 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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