all of the tools for working wood have stoneworking equivalents. t
slots could be cut with a waterfeed diamond router.
granite doesn't have the tenstile strength of wood or iron. t slots
would be in danger of breaking off if a lot of upward pressure was
applied, like using the slot as a clamping fixture base. a plain slot
would be more likely to survive used as a sliding jig guide only.
granite has really good wear characteristics, and it is pretty rigid,
so if you can avoid the brittleness of it you could have a really sweet
router table. I'd pass on the slots. instead, have it cut with the 2
long sides accurately parallel to each other and makes sleds that
straddle the whole table.
the hard part will be getting the drop in recess made.
No. My guess is that without access to a lot of specialized cutting tools,
this is a bad idea in practice. You could probably buy a nice top for less
than paying to get a granite one cut the way you want. And I know you could
build a nice top for less.
My thoughts... Granite and sharp router bits doesn't seem to be a match
made in heaven. I try to be careful with my bits, but if they hit a formica
or wood table, they're not going to get nicked.
My router table top also gets used for other things, like an assembly table
or whatever else I need it for. I wouldn't feel comfortable putting down a
hammer or something like that on a granite table. It would probably be fine
unless I actually dropped the hammer on it, but the noise would make me
nervous each time, I think.
In summary, it would probably work ok (IMHO), but I wouldn't go out of my
way to make it happen. The hassles of shaping/assembling it, the worry of
putting tools on it, and all the rest of it would outweigh the benefits like
it's mass, flatness, etc.
Doesn't seem very practical. It's going to be a huge PITA to cut out
the area to drop your mounting plate into. It's so easy to get a sheet
of 3/4 plywood and put some formica on it.. why go through all that
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