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Author Topic: Couplings!  (Read 590 times)

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Offline Old Crow

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Couplings!
« on: June 06, 2019, 04:05:43 PM »
My freight rolling stock is a mixed bag of Lima, Farish and Peco. The couplings look alike but they are certainly not the same and constant uncoupling is becoming a nuisance. Peco couplings in particular seem to hang down at a lower level and are fine with other Peco but trouble else.  Any suggestions?

I'm not going to do shunting so I'm of a mind to make up fixed trains and at least semi fix the couplings though I gather these will need to "work" so you cannot attach them permanently and also they need to push against each other or you get buffer lock.  Again, any ideas?

Offline port perran

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Re: Couplings!
« Reply #1 on: June 06, 2019, 04:14:48 PM »
I use Tacky Wax. Just a tiny blob on the coupling will “stick” it to the next one  and prevent uncoupling as the train traverses your railway. However, they are easy to separate by hand if you need to alter the positions of the wagon or carriage in the train at any time.

Tacky Wax is available from most model railway shops.
If it looks right then it most probably is right.


Online njee20

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Re: Couplings!
« Reply #2 on: June 06, 2019, 04:25:44 PM »
Seconded, I do the same.

I do have some 3D printed bar couplings for NEM pockets which aren't bad, but you lose some of the rotational flexibility of a rapido coupler.

Offline bridgiesimon

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Re: Couplings!
« Reply #3 on: June 06, 2019, 05:08:21 PM »
if you use a small screwdriver and push up against the bottom of the Peco coupling box under the coupling, it will raise the lower position of the coupler reducing the chance of uncoupling. Was shown this little trick recently and it works well.

Best wishes
Simon

Online Ditape

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Re: Couplings!
« Reply #4 on: June 06, 2019, 05:18:34 PM »
I too vote for Tacky Wax.
Diane Tape



Offline Bob Tidbury

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Re: Couplings!
« Reply #5 on: June 06, 2019, 06:09:42 PM »
Another vote for TackyWax from me .I run a train of wagons in memory of my late mate and he had a right mixture of wagons from all makers , when I bought them from his daughter they were allways uncoupling now no problem.
Bob Tidbury

Offline jpendle

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Re: Couplings!
« Reply #6 on: June 06, 2019, 06:14:22 PM »
I use Aircraft Kit Canopy Glue. Goes on white, dries clear.

John P

Offline ntpntpntp

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Re: Couplings!
« Reply #7 on: June 06, 2019, 07:01:30 PM »
Tiny dab of Copydex works for me if necessary, though to be honest I don't seem to have that many problems and I run stock from just about every Contintental N manufacturer there has been over the decades.
Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

Online Dr Al

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Re: Couplings!
« Reply #8 on: June 06, 2019, 08:31:25 PM »
if you use a small screwdriver and push up against the bottom of the Peco coupling box under the coupling, it will raise the lower position of the coupler reducing the chance of uncoupling. Was shown this little trick recently and it works well.

Best wishes
Simon

Agreed.

The other thing to check is that the nuts holding the body to the chassis are tightened - these can often be loose, or tightened further pulling the two together and this will help the coupling sit right (the top of the coupler is held in with a box on the body, so correct assembly is vital).

Cheers,
Alan
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Offline Old Crow

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Re: Couplings!
« Reply #9 on: June 06, 2019, 09:53:28 PM »
Thanks guys. Never used Tacky Wax so must try it.  Thanks Al, with regard to Peco couplings dropping I do tighten things but it seems there is just to much room in the coupling box allowing the drop so the next one I make I'll maybe slip some very thing plasticard under it.

Online Dr Al

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Re: Couplings!
« Reply #10 on: June 06, 2019, 10:47:06 PM »
next one I make I'll maybe slip some very thing plasticard under it.

I'd check for flash and suchlike stopping the two coming together -that's common too. They should not need this kind of modification if assembled correctly, or at most the slight adjustment that bridgiesimon suggested.

It may be worth pulling them apart and checking the surfaces for detritus, flash or suchlike.

Cheers,
Alan
Quote from: Roy L S
If Dr Al is online he may be able to provide a more comprehensive answer.

“We have also arranged things so that almost no one understands science and technology. This is a prescription for disaster. We might get away with it for a while, but sooner or later this combustible mixture of ignorance and power is going to blow up in our faces.”Dr. Carl Sagan

Online Railwaygun

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Re: Couplings - NEM coupling rods
« Reply #11 on: August 17, 2019, 04:08:10 AM »
DM Toys are now doing 3D printed NEM coupling rods in Assorted  lengths

https://www.en.dm-toys.de/produktdetails/items/MU_N-A00054.html

 
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Online njee20

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Re: Couplings!
« Reply #12 on: August 17, 2019, 08:10:10 AM »
Not cheap though! I use Etched Pixels ones from Shapeways.

Online Paul-H

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Re: Couplings!
« Reply #13 on: August 17, 2019, 08:50:16 AM »
I use these also from Shapeways

https://www.shapeways.com/product/BHSL3KHHX/nem-coupler-dapol?optionId=17521199&li=marketplace

Those are the Dapol Version, they also list the Farish Version.

What's the difference given that Farish and Dapol both use new pockets.

The answer is that Farish didn't read the spec sheet properly, the small pins on each side that holds the coupling into the pocket is smaller in diameter on some of the Farish couplings than every over NEM coupling maker.

I say some because it's only the current version of their standard coupling that is undersized. Their short coupling and earlier standard are fine.

Paul

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