Extruded Aluminum heat sink vendors

[purduephotog]

I've mailed several vendors from google searches and heard nothing- so either my spam filter is overactive or I'm just not getting through.

If you've bought extruded aluminum for heat sinks could I trouble you to list the vendor / website, whether or not it was anodized, and approximate cost/ft (for a specific model, obviously)

Places I've tried but not heard from:

http://www.mmmetals.com/

http://www.psiextrusions.com/heat.html

http://www.heatsinks.tv/products.htm

There are two more but I'm not at work and haven't got the access.

Thanks in advance-

Jason

 

[greenLED]

I've never heard of extruded heatsinks.

I'm used to seeing machined heatsinks, though. Several people sell them in the Custom & modified BST, if that's of any help.

 

[65535]

I believe he's referring to extrude flat topped heatsinks. The kind used for area lighting, thermal management in electronics and the like. Not flashlight specific machined heatsinks. I have seen a few companies, most do prefabbed sizes though.

 

[purduephotog]

I believe he's referring to extrude flat topped heatsinks. The kind used for area lighting, thermal management in electronics and the like. Not flashlight specific machined heatsinks. I have seen a few companies, most do prefabbed sizes though.

Definitely not flashlight specific- that's why I put it in fixed lighting

Think of these as those old style finned heatsinks you saw on your 486dx266 chips. Raised fins, etc. They're extruded from a die and then machined where necessary.

I did just get a quote from M&M- about 10$/foot. If I did purchase I'd need alot of folks in on it- min order is 200$ (although, frankly, that isn't all that much for the stock).

Something to think about.

Any other vendors?

 

[greenLED]

Think of these as those old style finned heatsinks you saw on your 486dx266 chips. Raised fins, etc. They're extruded from a die and then machined where necessary.

 

[jason 77]

Wouldn't it be cheaper and easier to use old heat sinks off of mother boards and other misc. PCB's?

That is what I do and it works pretty good?

 

[jtr1962]

Try surplus places like this.

 

[jason 77]

Try surplus places like this.

Yea that is a good site.

Just start collecting old thrown out electronics.. You would be amazed some of the componets/heatsinks you can get out of them for free!

:thumbsup:

 

[Mr_Light]

If you would describe your project I'm sure you could get some specific recommendations. It may be that aluminum plate or channel might work better for your application and save you some money.

 

[download]

How about aluminium curtain rail?
Mostly you can find 20 ft with reasonable price.
I plan to mod my ceiling light too.

 

[Illum]

I wonder if the big G can tell us what he used under his CREE bars

I personally would go with L brackets or square aluminum extrusions but they might be inadequate if your planning to drive the buggers at an amp or so each :candle:

at 350ma they are awesome, not to mention the ease of mounting

 

[purduephotog]

If you would describe your project I'm sure you could get some specific recommendations. It may be that aluminum plate or channel might work better for your application and save you some money.

Ehhh, here's the problem: I've got LOTs of projects

Right now I've got a growlight, 80 watts, using 10W LEDengin 660nm reds and 2.5W Seoul royal blues. The bars themselves were overheating, but I just laid a couple of pieces of chopped up PII heatsink and it's sufficient to keep them cool.

So I'd like a finned sink to help cool things down and make it a more permanent solution- ideally at less than 10$/foot as the spacing is 3", and at 37"/inch that means I've got nearly 100 sq inches per LED- at 10w that's just fine, but at 2.5W it's overkill (thus I could space things closer...)

Anyway... I've also got plans to make up some tungsten replacement lights using the GE VIO chips and I'm dying to buy a BridgeLux 4400 lumen array... which will take a very nice sink.

Krylon high temp black spray... here I come.

 

[Ken_McE]

If you can find a glass shop that does commercial work you may find that they have some very snazzy extruded aluminum that is used for the edging on commercial windows. You can also find aluminum thresholds for doors in hardware stores. All you have to do is scrape off any insulation and away you go...

 

[purduephotog]

If you can find a glass shop that does commercial work you may find that they have some very snazzy extruded aluminum that is used for the edging on commercial windows. You can also find aluminum thresholds for doors in hardware stores. All you have to do is scrape off any insulation and away you go...

That is true. I could do that- I have access to LOADS of 80/20 material, all hard/clear anodized and in sufficient quantity I could never ever run out of it. In fact, I've got a great supplier here that I could probably buy the shorts dirt cheap since she usually only gets scrap for it.

However... I'd still really like to make an effort to investigate using some good solid extruded heat sink material that's designed for heat sinking. My ultimate goal is to remove and install new lights downstairs in the kitchen that use the bridgelux N1200 LEDs- which means big cases for heat sink at 2.5A.

I think. Tc was rated at 60C on the units.

 

[blasterman]

I'm always in need of aluminum plate for my projects as heatsinks, but I always need very specific dimensions. With the price of alu dropping this helps a lot, but finding it cut to the right size is an issue.

 

[purduephotog]

I'm always in need of aluminum plate for my projects as heatsinks, but I always need very specific dimensions. With the price of alu dropping this helps a lot, but finding it cut to the right size is an issue.

I'd have to find the quote but I went into the metal supply depot here in Rochester and I as able to pick up 1/4" thick AL plate at scrap cost- all cutoffs. They did have a 20$ min order... I'll have to stop by more often.

 

[Mash]

Also try shops that make painting/foto frames.
They have a wide variety of alu bars and strips etc...
Once while glancing around and looking at their samples on display, they seemed suitable for our purposes. And they shoud be able to cut them to your required specs. You might even get lucky on their pricing.

 

[Norm]

Is this what your looking for?
aluminum heat sink extrusion profiles
I remember years ago seeing this stuff in 6 metre lengths.
Norm
Google alcoa heatsink extrusion - Google Search http://www.candlepowerforums.com/vb/showthread.php?t=226128

 

[purduephotog]

Is this what your looking for?
aluminum heat sink extrusion profiles
I remember years ago seeing this stuff in 6 metre lengths.
Norm
Googlealcoa heatsink extrusion - Google Search

Well, yes, that was the one manufacturer that wrote me back with a cost. Approximately 10$/foot for one I was looking at that had 37 sq/in per inch length.

 

[Mr_Light]

"80/20 material" is my current favorite heatsink material (surplus pieces off EBAY). It seems to do a great job of dissipating heat, it's anodized so I can glue emitters directly to it without fear of shorting, and the hollow pieces are a great place to hide wires and drivers.