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Old 09-30-2013, 04:00 PM   #11
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Thanks, I'll contact them and see what happens.
Let me know, I may know of a few more places that might be able to help you out.
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Old 09-30-2013, 04:12 PM   #12
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It would take about 30 mins to program the part the about another 3 hrs roughly to machine it. Not including the setup time.

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Old 09-30-2013, 04:23 PM   #13
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Actually, the runtime could be less depending on how nice of a finish the radius surface would need to be.

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Old 09-30-2013, 05:36 PM   #14
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It would take about 30 mins to program the part the about another 3 hrs roughly to machine it. Not including the setup time.
The shop in Braintree that said they could do it said about half an hour programming/set up, and an hour to run all 4 parts. They said because it was aluminum, the actual milling time would not be too long - but they said at least $250 to do it. They also thought it wouldn't need a CNC machine, but someone with a smaller milling machine (with some type of bar?) would be able to do it and the machine-time cost would be lower. After I couldn't find someone that could/would do it for what I thought to be a reasonable charge, I put it on the back burner. Now I'm ready to tackle it again.
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Old 09-30-2013, 05:59 PM   #15
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CNC is the way to go and aluminum is softer.

The price sounds good@$55.5hr. Some shops charge $65-80hr.

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Old 09-30-2013, 06:00 PM   #16
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Could you use wood?

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Old 09-30-2013, 06:16 PM   #17
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That price ($250) is probably about right. Depends on the finish you're looking for. I'd do it for $50 each with you supplying material and shipping.

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Old 09-30-2013, 06:23 PM   #18
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Could you use wood?
No, I need the thermal (heat transfer) properties of aluminum. I'm building a chiller, and the convex side of the aluminum plates will be against my conical, with the Peltiers on the flat face, then a heat sink and a fan.
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Old 09-30-2013, 07:48 PM   #19
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CNC really isn't needed. Might even be faster and easier to do it on a bridgeport with a big fly cutter or something set to cut the radius. Being aluminum it would cut it like butter.

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Old 09-30-2013, 07:51 PM   #20
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16" diameter fly cutter and an interrupted cut? Good luck with that!

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