Copper Pins

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Hey Guys,

Just playing around with my Reo Grand and just occured to me:
Why are Reos not using copper pins and springs for better conductivity?

I'm having these wild thoughts of designing a copper plate which also collapse
like the reo springs does as a protection...

Excuse me if this had been asked already, didn't mind searching for a similar
post as I was multitasking windows here and several excel workbooks...

Thanks!
 

boilednuts

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6 nines (99.9999 percent) silver is a beast but why do we need the overkill (crazy expensive too).

99.99996.jpg

This is "only" 99.9996 percent

0.5mm x 0.8mm SL-RSLC pure silver wire : 227.25usd per 15ft)
 

darkzero

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I wouldn't think so.
because if it does, then switch contact points would never have been made of copper.

Yes they are but copper contacts are most commonly plated with silver or tin to prevent oxidation. While copper is an excellent electrical conductor as well as heat conductor it oxides pretty fast. Bare copper electrical contacts aren't commonly seen except in closed enclosures.

Copper & aluminum is the most common metals used for electrical wire. Aluminum wire is not commonly seen as is is usually used for very large wires. Copper is more common but it is also common for copper strands in wire to be silver plated for the same reason but not always. Like most of the wiring in your home are solid copper wires. But they are usually terminated with a "permanent" connection like a screw or in most other application crimped like in automotive. The "permanent" connection will not be prone to oxidiation as fast as a momentary contact.

I have not disassembled my Reos yet (they're so well built I may not have to in a while) but the two areas I can can see where a copper connection would be used are the ground spring & the firing pin/plate. IMHO even a copper alloy would not work well for these parts as copper is too soft to provide a spring action for parts so small & thin. It does not make sense to make the atomizer connection out of copper as again copper is soft & can easily be stripped. Not wise to use copper here since the threads will be used quite often.

I suspect the firing pin (or whatever Robert calls it) is made of some type of stainless or steel due the spring action that's required from it. And the ground spring is probably nickel plated steel. The ground spring could be gold plated but I highly doubt it would provide any noticeable performance improvements. Hearing that the firing pin can have an oxidation problem it may benefit from a corrosion preventative coating but not necessary as long as the user maintains their mod as recommended by Robert. IMO Robert made a good decision to use what he did. Sure some people may not have a big issue with copper oxidizing fast (if copper was a suitable metal for those parts) depending on the environment they live in but Robert has no control on that & must take into account for most climates. Just think if Robert were to sell his mods with the disclaimer stating the mods could only be used in dry climates.

Even if copper would work in the areas mentioned, the benficial properties of copper in such a low current application is not worth the additional cost. The cost of copper just keeps rising.
 

super_X_drifter

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Yes they are but copper contacts are most commonly plated with silver or tin to prevent oxidation. While copper is an excellent electrical conductor as well as heat conductor it oxides pretty fast. Bare copper electrical contacts aren't commonly seen except in closed enclosures.

Copper & aluminum is the most common metals used for electrical wire. Aluminum wire is not commonly seen as is is usually used for very large wires. Copper is more common but it is also common for copper strands in wire to be silver plated for the same reason but not always. Like most of the wiring in your home are solid copper wires. But they are usually terminated with a "permanent" connection like a screw or in most other application crimped like in automotive. The "permanent" connection will not be prone to oxidiation as fast as a momentary contact.

I have not disassembled my Reos yet (they're so well built I may not have to in a while) but the two areas I can can see where a copper connection would be used are the ground spring & the firing pin/plate. IMHO even a copper alloy would not work well for these parts as copper is too soft to provide a spring action for parts so small & thin. It does not make sense to make the atomizer connection out of copper as again copper is soft & can easily be stripped. Not wise to use copper here since the threads will be used quite often.

I suspect the firing pin (or whatever Robert calls it) is made of some type of stainless or steel due the spring action that's required from it. And the ground spring is probably nickel plated steel. The ground spring could be gold plated but I highly doubt it would provide any noticeable performance improvements. Hearing that the firing pin can have an oxidation problem it may benefit from a corrosion preventative coating but not necessary as long as the user maintains their mod as recommended by Robert. IMO Robert made a good decision to use what he did. Sure some people may not have a big issue with copper oxidizing fast (if copper was a suitable metal for those parts) depending on the environment they live in but Robert has no control on that & must take into account for most climates. Just think if Robert were to sell his mods with the disclaimer stating the mods could only be used in dry climates.

Even if copper would work in the areas mentioned, the benficial properties of copper in such a low current application is not worth the additional cost. The cost of copper just keeps rising.

I dig it when electrical engineers share their knowledge. Or did you stay in a holiday inn express last night? Either way, great job simplifying metallurgy and conductivity so that we can understand. :)
 

darkzero

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I dig it when electrical engineers share their knowledge. Or did you stay in a holiday inn express last night? Either way, great job simplifying metallurgy and conductivity so that we can understand. :)

Haha, sorry, didn't mean to sound like that. I'm no EE & nowhere near that level of education so Holiday Inn Express. :)
 

super_X_drifter

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Haha, sorry, didn't mean to sound like that. I'm no EE & nowhere near that level of education so Holiday Inn Express. :)

I'll settle for just a smart dude with a good handle on the principals and properties who can lay it out in a way even I can understand. Nice job bro :).
 

bullet

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Thanks for sharing your insights, darkzero.
I may have failed to mention that I'm in the asia, particularly the Philippines
who only has experienced two seasons--- wet and dry.

Not much issues with copper oxidation here as Filipino-made full mechanical mods
are made of copper contact points most of the time.

With that being said, thanks again to Robert for a wonderfully made mod and for
being open to suggestions and all.
 

durianeliquidflavorplease

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Hello! Don't mean to hijack this thread, but since the guys here already know stuff about copper pins, may I ask if I can copperplate my full mech mod's pins? Like, can I just soak them in vinegar and do the procedure I've seen in basic science experiments where they copperplate coins. Thanks!
 

unloaded

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I made a firing pin out of brass shim stock. It does seem to hit harder but I can't be sure, might be placebo effect. The springiness of the button is much lighter, that is either good or bad depending on your preference. Getting it the right size and shape took quite a bit of doing. The difference between too long and too short is very small. In my opinion, the benefits (if any) aren't worth the trouble to do it. I did use DEoxIT Gold on all my contact points at the time and haven't had to do any cleaning and its been a couple of weeks already. Now that I think about it, maybe that's why it seems to hit harder? I give that stuff a big thumbs up. As far as modding it, there's not much room for improvement. My main goal was accomplished though, I like to know my gear inside out.
 
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