Re:

>
> Yep....they use a curved profile end mill specifically made to cut a 4.25"
> radius...just like you mentioned below. In fact I could make the part (as
> it appears to me) without using CNC at all right on my bridgeport. I vote
> for the mill :)
>
> Smoke

Stare harder. Each triangular "wing" is undercut ! And each cube face is flat.
If you can simultaneously manually mill two curved surfaces, requiring
three cranks be turned in a sinusoidal manner ( with two hands and one foot,
I suppose ), I will pay good money to come and see you do it.

Me, one crank in a straight line is the limit of my manual dexterity, and even
that's a stretch.

This job would be trivial in a CNC lathe and no tool fancier than a boring bar
with a wide enough face to clear the undercut.

The mill .. maybe with a flycutter cutting the curved wings one at a time.
Although even that doesn't seem doable, given the apparent radius of the
curves.

But an endmill ? How that would be possible is beyond me.

Alan

Who can see a lot of tomorrow being wasted on this when he should be working.


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