RE: [ATM] mirror grinding

[Ken Hunter <atm_ken_hunter@yahoo.com>]

I use a flywheel off of some unknown truck. I put a
few radial slices in the surface with a hand grinder
to distribute the grit and it works fine. Think I paid
a couple dollars for it years ago.

Ken Hunter



--- GARY FUCHS <gary@rcn.com> wrote:

> >>The grinding tool does not have to be round,
> however, if it is square, I
> suggest cutting the corners off of it.   Yes, if you
> can find a flat rock,
> that can be used as a hog out tool.  However,
> aluminum works much faster.
> 
> Thanks. Can I ask a couple more...
> 
> I can get steel for $0.18/lb vs $1 for Al and
> stainless - is there enough of a 
> difference to justify the more expensive metal? 
> 
> Is there an ideal ratio of tool diameter and contact
> area to glass diameter? For a 12" 
> how would a brake rotor do - I'm thinking of working
> with the wide part, about 8 - 
> 10", holding the smaller section (where the wheel
> mounts). Or would a simple ring 
> do just as well?
> 
> Thank you,
> 
> Gary Fuchs
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> 


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