Well there's no harm in trying, how big is the outer and inner tile you want to do ? I think anything is possible but will need a lot of patient and I think the vibration may give problem to the tile.
it can be done in a number of ways, but it can take several attempts and be costly! If its a reasonable sized hole, drill the corners of the square and score between them. Then using a reasonable sized drill or tile cutter bit start to nibble out the centre. if there is sufficent room at the end it can be tidied up with pincers. I have managed to do it but very difficult. Another method is a small angle grinder to cut out the square, or you can lower it down onto a ile cutting saw very slowly and bring the blade up through as long as its one of the slow saws that is!
If I need to cut a rectangle for a shaver socket I take the guard off my diamond cutter and VERY carfully lower the tile onto the blade until it breaks through then proceed as normal, stopping at the line, repeat 4 times. This would be OK for one or two inset tiles but a lot of work if there ar a lot to do.
Safety Note - only try this method if you know what you are doing as it can be very dangerous to use one of these cutters without guard and riving knife.
It is easier to select a range of tiles that come with the cutout already in them like these which take a 50x50 glass tile
What happened to those ultasonic tile cutting pens. My brother had a prototype (before he emigrated to Oz back in the late 80s). I'd have expected them to be in every DIY store by now. They were ideal for cutting curves and difficult checkouts. Did they never get into commercial production?
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