Re: Re: Any "Best Practice" Recommendations for clearing chips and feed/speed when

To the group:

Red (iron) oxide and aluminum powder pigments ("silver") were combined as an
experimental paint and used on the Hindenburg. Besides Thermite, iron oxide
or rust and aluminum powder are apparently also used as a rocket fuel in
solid fuel rockets. Rember the engines that used the big "O" rings?

There is a theory illustrated well in a program on PBS, that the Hindenburg
disaster was caused by static electricity igniting the paint. Which burnt
faster and with more distructive effect than the infamous hydrogen gas
within.

I heard recently that plastic pipes for dust collection is prohibited by the
Uniform Mechanical Code due to possible problems with static electricity. A
large enough spark could get quite hot. A prudent person would use care
when considering a dust collection system using plastic pipe, even in a
small system.

Gary M. Wheeler, AIA, architect
Modesto, California
Home page: http://g.wheeler.home.att.net
Ebay: g.wheeler@...

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> > In your recent post I noted your claim that THERMITE was known for
> > self ignition. This is WRONG. Thermite requires a ignition source
> > in excess of 1400 degrees. When it starts burning it will generate
> > temperatures of 6700 degrees F.
> >
> > The problem many people in the metal working industry have had is
> > grinding swarf which contains both aluninum oxide and steel or
> > ferrous oxides, that thas dried and were ignited by heat generated
> > when maching without coolant.

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