Quote:
Originally posted by Gulp35
If you wanted to drill a funnel shape, I think there are drill bits with a sharp pointed end (I'm not sure but I think that I have seen one). But if you need a Parabolic Nozzle you could use multiple bit drilling down on the same spot.
I'll try to describe it:
First use the width of the nozzle exit and drill althe way through the nozzle peice.
Second move to a larger drill bit and drill down not as far as the first but just so.
Third, repeat trying to make a parabolic shape (It would actually be staggered).
Fourth, Take your dremmel or some grinding tool and smooth out the stagering.
I'll post a pic later, (I have a history paper to write )
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I know what you mean, but i think there are ways to do it all in one step. They also make "counter sinking" bits that makes the ovel shape on the material for the screw to fit flush with the top. I have one but I think it's angle is not steep enough.