Hi
I've got a piece of glass 30x30cm (4mm thick).
I need to take a corner out of it 4x4 cm:-
+----------+--+ | | | | +--| | | | | | | | | | | +-------------+Any suggestions on the easiest way to achieve this. I'd like to also try and ensure that the resulting edge isn't dangerously sharp.
Many thanks,
Steve
Yes. 30x30x4mm??
Go to glass supplier
Give him dimensions/details and let him do it
Take glass home and use
Job done. It cannot be worth trying yourself for a sheet that size as the amount of effort, possibility of failure etc., aren't warranted for the price.
Very good point...
Thanks!
The only practical way of doing this - assuming it's not toughened - is a diamond saw, or 'router' bit.
I have used a dremel, with a MDF template, and a diamond bit similar to the one the tenth from the left on
Alternativerly, a tile-cutter can do this easily. However, you will need to turn the glass over, and finish off the cut from the back to get a straighter cutat the back in most cases. Use a diamond knife sharpener, or some SiC sanpaper to knock the edge off.
I've never had to do it, but I believe the way to cut a re-entrant shape is to score several lines on the waste and break it out in pieces, e.g. divide the corner bit into 1cm squares, strips, or triangles.
However, I've _never_ managed to cut a piece of glass with a neat, let- alone safe edge, and if that is a requirement, I'd go out and buy a new bit -- it isn't that expensive of you go to a real glazier, not one of the sheds. IU that to get a decent cut you need not only expertise, but also new glass, and most DIYer glass cutting (mine anyway) is done on bits of indeterminate age that have been lying around in the "it will come in useful if I keep it long enough" pile.
Chris
snip of OP
I have never seen this done, but what tool will the glass supplier use to do the job?
Dave
A glass cutter & many years experience probably.
Bob is dead right - get a glazier to do it.
I was just curious. I had an image of a diamond wheel and just as you complete the second cut, the glass fractured at an angle to the cut. Just like old glass does, when you try to cut it with a glass cutter :-(
Late last year, our daughter decided to tile her kitchen floor and when I went down to visit her, she wanted me to cut some complex shapes for her. They were around the door frames and some strips less than her (and my) tile cutter could do. I took them to Tops Tiles and they did them for a pound a cut and that went into a charity box. With complex tile shapes, I usually do them with a tile cutter and an angle grinder, but these were so hard and brittle, I was running out of tiles, before I could get the cut done.
Dave
I started a leaded glass class once, I only lasted 2 or 3 lessons. The cutter we used to cut irregular shapes was in the style of a pen, oil filled and with a tungsten wheel. The glass was snapped over a rubber mushroom. Was dead easy and even this novice could do it.
mark
But could you cut an invasive corner out of a piece of glass ?
Dave
No. I doubt it can be done by two straight cuts due to 'crack propagation', meaning that the glass will crack beyond the extent of scatch lines.
mark
I wondered about drilling a small hole at the internal corner to stop the crack.
Thanks everyone for your replies.
Steve
Hi All
Just caught up with this thread - back from a week's sunsh>>
You might just get away with it - but only on a good day. About the only practical way of doing this particular cut would be with a tile saw, or a dedicated glass saw (think bandsaw + diamond abrasive on a steel wire - but you wouldn't want to buy one just for that.
Actually, there's another way - which involves a cylindrical diamond core bit in a drill press and then a fine diamond grinding bit to take out the remaining glass - messy, but you'd get there in the end.
Trouble with all of the 'scoring' methods is that the glass will only accept 'suggestions' as to where it should break, and the break, once started, will want to run right across the sheet...
The trick of making a deep cut by a succession of shallower cuts doesn't always work .....
Hope this helps Adrian
I had wondeded if you could make the desired shape by sticking two rectangles together. You'd get an (almost?) invisible join if the glue had the same refractive index as glass. Google confirms such glues do exist.
I guess you could - not sure how strong it'd be....
From experience with 'stained' glass (mostly 3mm, some 1.6mm) the cut edge is hardly ever (= never!) perfectly square to the face of the glass.
I guess the glue would fill in the gaps in the joint....... maybe you could then razor-blade the excess off ?
Adrian
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