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Originally Posted by prandtl
And just why would't you be able to use a slitting saw on one of those? I made my WW clone with a slitting saw on a mill about the same size as the mill shown in this thread.
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i said the best thing to to microchannels with ARE slitting saws..
1/32" of an inch for an endmill is really small. i'd be afraid that they wouldn't last long, and to get through a single cut, you'd need tons of coolant and evacuation of chips...