Who can make a custom heatsink?

[Erasmus]

Hi there!

I recently designed a heatsink I'd like to use for a MagMod, can any of you guys with a CNC make this? Please PM me your quotation It should be made of bare aluminum.

Here's the drawing :

Google SketchUp files are also available if needed.

Thanks!
Raf

 

[gadget_lover]

I've said it before, but I think it needs to be repeated once in a while.

When asking for quotes based on technical drawings, you have to let the machinists know what tolerances are acceptable. The tolerances make a major difference in the amount of work that goes into a part.

If the part has to be exact in every dimension, then any single mistake will make the piece unusable. If 90% of the measurements are "ballpark", then minor mistakes can be redone or accepted.

The 6 measurements in the drawing are specified to 1/10 of a mm (.004 inches). That implies that errors of .05mm (.002 inches) are acceptable. That's doable for any home lathe or CNC setup.

A way to specify tolerances is to use +/-. For instance the bottom part appears to fit inside the maglight, so it can be no bigger than 34.2mm, but could be smaller without harm. That would be 34.2mm +0/-.1. The internal hight of the top part is called at 17.0, but can probably be 16.5 to 17.5 without problems, so it should be 17.0 +.5/-.5

No, I don't have facilities to mass produce such a part.

Daniel

 

[Mirage_Man]

Just finished a prototype. All dimensions are +- .002" I test fit it inside a couple Mags I have and it fits quite nicely . I don't have a CNC machine but I can look into having them made.

 

[Chodes]

Who can?
Mirage Man can. And did!

Impressive - 3hours 15 from post to post.

 

[Erasmus]

I've said it before, but I think it needs to be repeated once in a while.

When asking for quotes based on technical drawings, you have to let the machinists know what tolerances are acceptable. The tolerances make a major difference in the amount of work that goes into a part.

If the part has to be exact in every dimension, then any single mistake will make the piece unusable. If 90% of the measurements are "ballpark", then minor mistakes can be redone or accepted.

The 6 measurements in the drawing are specified to 1/10 of a mm (.004 inches). That implies that errors of .05mm (.002 inches) are acceptable. That's doable for any home lathe or CNC setup.

A way to specify tolerances is to use +/-. For instance the bottom part appears to fit inside the maglight, so it can be no bigger than 34.2mm, but could be smaller without harm. That would be 34.2mm +0/-.1. The internal hight of the top part is called at 17.0, but can probably be 16.5 to 17.5 without problems, so it should be 17.0 +.5/-.5

No, I don't have facilities to mass produce such a part.

Daniel

Thanks for your input, I'll take this into account for future drawings.

 

[Erasmus]

Just finished a prototype. All dimensions are +- .002" I test fit it inside a couple Mags I have and it fits quite nicely . I don't have a CNC machine but I can look into having them made.

Wow what a nice piece of workmanship! Amazing that it's done so quickly, and the finish looks gorgeous!

Thank you! PM sent.

 

[Mirage_Man]

On it's way to you Raf. :thumbsup: Let me know when it arrives.

 

[Mirage_Man]

Well I guess Erasmus is not happy with the heat sink I made. I made it so there would be enough play to allow for thermal compound at all the mating surfaces. But it is too loose for his taste. He would have preferred that I made it too tight so he could sand it down. So I should be getting this back at some point. If anyone wants it let me know. I have no doubt that it will work fine for its intended purpose.

 

[ambientmind]

Well I guess Erasmus is not happy with the heat sink I made. I made it so there would be enough play to allow for thermal compound at all the mating surfaces. But it is too loose for his taste. He would have preferred that I made it too tight so he could sand it down. So I should be getting this back at some point. If anyone wants it let me know. I have no doubt that it will work fine for its intended purpose.

either way, it looks amazing! great work!!! if its free, i'll take it! :wave: i may contact you for some work in the future if you dont mind, i'm coming up with the ideas right now. they should be super easy to turn, i just dont have a lathe.

 

[Mirage_Man]

either way, it looks amazing! great work!!! if its free, i'll take it! :wave: i may contact you for some work in the future if you dont mind, i'm coming up with the ideas right now. they should be super easy to turn, i just dont have a lathe.

After having thought about it awhile I think I might just use this myself in a build. I spent 3 hrs. making it. So if I decide to sell it I will start a new thread.

 

[PhotonFanatic]

Brian,

Your experience with this heatsink reminds me of why I want all the pieces before I do any special pieces for a light.

 

[will]

Brian - a lot can be said for having tolerances listed on parts to be made. When I worked as a machinist all specs had a +/- tolerance listed.

 

[scott.cr]

Well I guess Erasmus is not happy with the heat sink I made.

What's that saying about "no good deed..."

You've garnered the good will of a lot of other peeps here so it's not a total loss.

 

[Mirage_Man]

What's that saying about "no good deed..."

You've garnered the good will of a lot of other peeps here so it's not a total loss.

I was compensated for the work. Albeit not as much as I would generally get based on time and materials. I made it in a way that I thought it was usable hence not to his exact specs. He was not happy with it so that's fine. If I paid someone for a job and it didn't meet my expectations I would likely have complained as well. It's not a big deal. Lets not blow this outta proportion.

 

[wquiles]

I am giving this a shot and started working on it today. This is 2.0 DIA Al:

Brian - Have I mentioned lately that this 6" chuck is awesome !!!. And you are right, as I use it more and more, it is becoming smoother/easier to open/close

 

[Erasmus]

Looks amazing New design is uploaded, PM sent. Thanks a lot!

 

[wquiles]

Had to modify a tool holder on the mini-mill, so I only did a little bit more work today - I am getting closer

 

[wquiles]

Well, I could not finish today as I hoped. The tailstock drill chuck that I always used actually belongs to the 7x12 lathe that I sold to Milkey, so as it turns out I had "none" for myself. I just placed an order with Enco for a nice Jacobs ball-bearing Super Chuck (and the MT2 adapter for my tailstock), so assuming that the parts arrive this week while I am on travel, I should finish next weekend.

 

[Mirage_Man]

Well, I could not finish today as I hoped. The tailstock drill chuck that I always used actually belongs to the 7x12 lathe that I sold to Milkey, so as it turns out I had "none" for myself. I just placed an order with Enco for a nice Jacobs ball-bearing Super Chuck (and the MT2 adapter for my tailstock), so assuming that the parts arrive this week while I am on travel, I should finish next weekend.

Ever try mounting a drill in a tool holder? If you go slow it should work fine. I mean you're just roughing the hole to get a boring bar in there anyway, right?

 

[wquiles]

Ever try mounting a drill in a tool holder? If you go slow it should work fine. I mean you're just roughing the hole to get a boring bar in there anyway, right?

No, I have never tried that - I guess it should work since yes, all I need is a rough hole to get my boring bar to do the "real" work :thumbsup: . Then again, I still "want", I mean, "need" a Jacobs Super Chuck, right?