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In Need of Expert Machinist for Ambitious Heatsink

Wolfman29

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Hey everyone. This may sound odd coming from one of the more recent machinists on the forums... but I need a heatsink made!

This heatsink is for a very ambitious project. What makes it so special?

It needs to be made out of pure silver. Further, it needs to be a diode press-fit and be threaded for Aixiz lenses.

I expect this heatsink to cost approximately $100-$150 (it's relatively small).

PM me or post here if you think you are capable.

Further, I will be making a replica heatsink out of aluminum for this part that can be sent to the machinist to duplicate in silver once we have made the arrangements.

Thanks,

Wolfy
 

T_Warne

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How small are you talking about? Where are you obtaining silver rod? Since you will have a prototype, have you considered having your heatsink cast from investment mold and then machining the fine tolerances?

Maybe talk to scopeguy20 about the options.
 
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Wolfman29

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Yeah, that's the problem. I actually decided to go with silver-plated copper for better tolerances and for cheapness... I looked at .75" silver rod at 6" long and it was over $800 ~.~
 

T_Warne

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That does sound like a more affordable option. What diode you planning on sinking with this shiny piece of bling?
 

Wolfman29

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Probably going to be either an H1600 blue, a new 500mW 635nm, or one of the green diodes, whichever. Going to be really exotic.
 

T_Warne

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I'm drooling over the thought of a 510nm diode.

Please post whatever you end up with. I'd like to see it.
 

Fiddy

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interesting & expensive concept, although silver has a Thermal Conductivity of ~429W/(m.K) and pure copper is ~401W/(m.K) not such a big difference like the gap between aluminum which is ~250W/(m.K)

Id love to see a uber polished silver heatsink tho! :pop:
 

lman

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wheres the solid gold wire?:crackup::crackup::crackup::crackup::crackup::crackup::crackup::crackup::crackup::crackup::crackup:
 
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cilegray

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I have a small silver plate about 50mms square by 2mm thick. 2 ounces or so...lmk if you want it
 

Wolfman29

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Hmm... well, my heatsink is a lot bigger than that... but it seems like it's not o_O I did the math, and I have less than a cubic inch of material. I have about .137in^3, which works out to be about .75 troy oz, so I figure 1 troy oz is a good estimate for how much I may actually need (for polishing, etc.). You sure yours weighs 2 ounces? 50mm by 2mm is tiny.
 

cilegray

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.I remember measuring it and plugging the numbers in a calculator... and I'm pretty sure it came out to between 2-3ounces. I'm just estimating size by what I remember I'm not home right now,will update you with real numbers in a few hours
 

Wolfman29

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Alright - sounds good. Because 50mm by 2mm is only only .1cm^3, which would be about an ounce... which may be exactly as much as I need. But it doesn't sound like much -.-
 

Wolfman29

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OH. I thought you said 50mm^2, i.e. like 5mm x 10mm x 2mm or something. Not 50mm on a side.
 




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