04-04-2006, 08:47 PM
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| | | Join Date: Feb 2006 Location: USA
Posts: 22
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There are (1/8in) tapered (1 degree) ball nose end mills with that long of a length of cut (2in) MSC #97875330. Fins are always tapered when they are cast since you need draft to be able to pull the part out of the mold, but tapering is not detrimental to heat transfer. The reason is that as heat is conducting along the length of the fin, it's also leaving the fin, so the farther along the fin you are, the less heat there is to conduct.
That's the academic part...
You are right about a lot of passes, an end mill this small is like machining with a wet noodle.
Since you're willing to get a little more coarse with the fin pitch, you can use a tapered end mill with a bigger angle and it will help improve the stiffness. |
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