Re: [ATM] Dental Stone Tool

[Dave Smith <smithersscope@yahoo.com>]

Not to be disagreeable, but I concur with Mike. I've
hogged and fine ground two 13" round chunks of plate
glass (not mirrors YET--alas,one never will be!) with
tile-embedded in concrete tools. I, too, had plenty of
tile left after the fine grind was finished. I used
porcelain tiles (they were the 2" square variety in
mat format) from Home Despot. I did have one or two of
partial tiles on the edge fall off during the grind,
but it apppeared inconsequential to grinding. I did
not seal my concrete tool and I only had scratches
once when the tool and mirror glued themselves
together. There's another recent thread that suggests
not to let the tool dry out during fine grinding.
DITTO! I concur with that, too!

Dave
--- Mike Lockwood <melockwo@uiuc.edu> wrote:

> Hi,
> 
> Bob May wrote:
> > In addition, the tile tool shouldn't be made until
> you have the
> > hole dug out of the mirror to something close to
> the depth that
> > the surface needs to be.
> >                 YOU CANNOT DIG THE HOLE WITH A
> TILE TOOL!!!
> > To do so wears the tiles excessively and you often
> wear the tiels
> > down to where they need to be replaced, usually
> somewhere in the
> > fine grinding when they start wearing through.
> > If you're doing something like a F20 or longer
> mirror in the
> > usuall small sizes, you can start with the tile
> tool but
> > otherwise, the wear is too great.
> 
> I've got to disagree there.
> 
> I did a 6" F/6 with a tile tool (single layered)
> including hogging.  I 
> had plenty of tile left at the edges of the tool to
> complete grinding.
> 
> These were hard porcelain tiles (all the way
> through, not just the 
> surface), I believerd, ordered through a tile store.
>  Probably a bit 
> better quality than you would find at the typical
> home center.
> 
> There should be a nearly linear relationship between
> the volume of 
> glass removed and the volume of tile used in doing
> so.
> 
> 	Mike Lockwood
> 
> 
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> 



		
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