Simple NG magnetic buffer couplers

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mike

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Cracking job !
 

Moonraker

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Sharing my simple magnetic couplers as used on my Ffestiniog stock. 16mm Narrow Gauge magnetic coupling by noiseboy72

Hopefully of use to someone. They just need a 6mm magnet and a small screw to complete.

View attachment 314948
Nice job but watch out for derailments on sharp curves because there is no flexibility in the horizontal plane. I have a 009 layout (for indoor amusement) and recently replaced all the couplings with Hunt magnetic couplings. The result was frequent derailments on sharp curves so I had to change them all back.

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Peter Lucas
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Paul M

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I'll ask No2 Child to print some off. The magnets will need some research, too weak and the train length will be a problem, too strong and as Peter says, there will be no flexibility unless the unit can freely swivel
 

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Nice job but watch out for derailments on sharp curves because there is no flexibility in the horizontal plane. I have a 009 layout (for indoor amusement) and recently replaced all the couplings with Hunt magnetic couplings. The result was frequent derailments on sharp curves so I had to change them all back.

Regards
Peter Lucas
MyLocoSound
Thank you.
I designed the coupling to have quite a lot of both horizontal and vertical slop - much easier to attain in G scale, so the coupling can cope with 2' radius. The body is larger than the coupling shaft, and by using a couple of M2 sized self tapping screws as the pivot, about 30⁰ of movement are possible for each coupler.

Quick video of the stock on my garden railway, which has 2'6" curves in a couple of places.

 

Paul M

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Looks very good, definitely worth a go.
 

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I'll ask No2 Child to print some off. The magnets will need some research, too weak and the train length will be a problem, too strong and as Peter says, there will be no flexibility unless the unit can freely swivel
I used 6mm x 2mm. They have a holding force of about 750 grams, which is not far off the tractive effort of even quite a large loco. Make sure the magnet faces sit slightly proud of the coupling, so that they fully connect. They do need quite a tug to disconnect!

You can always adjust the screws and screw holes to give more flexibility if required.
 

RDFMTS2

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I used 6mm x 2mm. They have a holding force of about 750 grams, which is not far off the tractive effort of even quite a large loco. Make sure the magnet faces sit slightly proud of the coupling, so that they fully connect. They do need quite a tug to disconnect!

You can always adjust the screws and screw holes to give more flexibility if required.
Hi, I may be missing something here, if so, please accept my apologies. In my head one would need two magnets a N and a S side by side, on each buffer face, otherwise you could end up with, say two N magnets meeting and repelling rather than a N and S meeting and attracting. I can see the reason for wanting to use magnets, and would be interested in trying if it can be made to work, maybe you have found something like a very small horseshoe magnet, and I am just typing the wrong words into google. Could you maybe post a link to what magnet you have used? Thanks for sharing this idea, and sorry again if I have miss read it. David
 

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Hi, I may be missing something here, if so, please accept my apologies. In my head one would need two magnets a N and a S side by side, on each buffer face, otherwise you could end up with, say two N magnets meeting and repelling rather than a N and S meeting and attracting. I can see the reason for wanting to use magnets, and would be interested in trying if it can be made to work, maybe you have found something like a very small horseshoe magnet, and I am just typing the wrong words into google. Could you maybe post a link to what magnet you have used? Thanks for sharing this idea, and sorry again if I have miss read it. David
You are correct, these are handed couplers, so if your stock gets turned in service, it may not be suitable.

I do have a design tweaked by another user, which uses a pair of 3mm magnets mounted North to South, side by side. I'll upload the files to Thingiverse.com and share the link.
 

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1688714047041.png
This is the dual magnet version.
 
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Paul M

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I used 6mm x 2mm. They have a holding force of about 750 grams, which is not far off the tractive effort of even quite a large loco. Make sure the magnet faces sit slightly proud of the coupling, so that they fully connect. They do need quite a tug to disconnect!

You can always adjust the screws and screw holes to give more flexibility if required.
Sounds great,
I'm sorry I've just re-read my post, and I sounded a bit negative, I do apologise, I certainly didn't mean to! The design has got to be easier to use than Accucraft choppers!
 

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Sounds great,
I'm sorry I've just re-read my post, and I sounded a bit negative, I do apologise, I certainly didn't mean to! The design has got to be easier to use than Accucraft choppers!
No apologies required! Let me know how you get on.
 

Paul M

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The hardest bit would be convincing No2 Child to stop printing Star Wars stuff, and print something useful
 
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dunnyrail

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The hardest bit would be convincing No2 Child to stop printing Star Wars stuff, and print something useful
Oh Stars Wars stuff, can I get an order in for a 1:24 R2D2 please?
 

Paul M

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Oh Stars Wars stuff, can I get an order in for a 1:24 R2D2 please?
We did look into it for you, Jon. Unfortunately the printer wouldn't be able to cope with the detailing, a resin printer would be required
 

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We did look into it for you, Jon. Unfortunately the printer wouldn't be able to cope with the detailing, a resin printer would be required
I can do resin. I'm sure a deal can be struck...
 

dunnyrail

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