On Monday, February 13, 2012 07:03:03 AM Greg Bernard did opine:

> Gene-
> Sounds like your problem is mostly due to the crappy aluminum. I had
> that happen this weekend cutting an aluminum sign using customer
> supplied material. I did a dry run with a .07 2 flute in some 6061
> alloy (which cuts without coolant just fine at ~20,000 rpm)  and all
> was well. When I went to cut the job the bit loaded up immediately. So
> I ended up using an 1/8" bit cutting with a flood of  WD-40 and
> settling for the larger radius in the corners. Gummy aluminum sucks.
> Have you considered using brass for your wheel? Nearly every hobby shop
> carries the K&S brass sheets. I believe it's all 360 brass which
> machines beautifully.  Plus, it's very easy to blacken it.
 
That sounds precisely like what I need.  And I know where to get that 
almost locally, 50 mile round trip.

I don't think I need to blacken it since this is transmission mode stuff.

Thanks for the reminder.  I have some brass door kick plate I think, but I 
tried to engrave some name plates and found that no two sheets of it 
machine the same.  The first one did a beautiful job & sold the name plate 
idea, but the next sheet was a little gummy & threw up ridges.  And its 
that stuff I have half a sheet of.

Good idea.  Thanks again.

Cheers, Gene
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
My web page: <http://coyoteden.dyndns-free.com:85/gene>
YOW!!  What should the entire human race DO??  Consume a fifth of
CHIVAS REGAL, ski NUDE down MT. EVEREST, and have a wild SEX WEEKEND!

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