Re: [ATM] Dental Stone Tool

[Mike Lockwood <melockwo@uiuc.edu>]

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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