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On 05/21/2011 01:04 PM, H & J Johnson wrote:
I've built several fans that look like this, however to do so via milling from billet would be fairly expensive. In the past theones I've built have always been a steel construction from cnc cut parts and then welded together.
For billet, you'd need a 12"x12" blank, 3" thick. McMaster-Carr is asking $378.67 for 6061-T651 of that size.
OUCH!!
That ain't gonna work.
But how about this? Cast a thick cylinder, and then drill 1" holes from the sides towards the center. Casting and drilling should be a breeze. It would require a mill and a large indexer to get an accurate spacing, though.
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