Discussion in 'Fettling Forum' started by tretrop, Apr 24, 2020.
Could this be of use?
I’ve never tried globe cutting, the tool does look like it could be useful...
Could be useful on modern glass. Someone on this forum cuts cafetière glasses down for their lanterns. I forget exactly who, but it may have been @ColinG. Thanks for the link.
I see that one use is making drinking glasses from bottles. Is the cut edge sharp enough to cut you?
Yes Jeremy, that was me! I haven't done it for a while but I'll need to again soon to finish off my scrap heap 'Southern Vectis' Bialaddin!
I’m sure any cut glass would need smoothing off before drinking from it.
I've tried cutting bottles like that, it works.
I've tried cutting modern tempered glass globe, nothing happened.. the glass did not even crack..
If I need one I'll probably make my own but currently I use a pillar drill/bench press drill and a diamond wheel to cut Pyrex coffee press inserts down to size.
You guys never cease to amaze me... some of the things you come up with. They say, "necessity is the Mother of invention". I believe it!
I remember filling coke bottles with old engine oil, and then plunging a glowing red screwdriver into it. The shock change of surface tension would crack the glass at the level of the oil.
Over to you Colin!
@ColinG ...I for one would like to see a short video on this subject, please?
OK... I'll sort something out by I've run out of cafetiere inserts.... although I can probably use something else to demonstrate the principle.
I'd be interested to see that as well Colin
Ok... I might have something I can show you. I'll put something up tomorrow.
Sorry it took a while, but here is my set-up for cutting down coffee press Pyrex glass liners.
Please excuse the messy work environment but my workshop is long overdue a good clean up!
As you can see, this particular Pyrex glass broke just as I was getting close to finishing it! It is a risky business but as these cafetiere inserts are cheap I'm not too bothered.
Is the name of these glasses (coffee press Pyrex glass)
Can not find them on www.
Maybe someone has a link.
This is what I use... I remove the Pyrex glass from the metal or plastic and then cut it down to size.
I ask around or go to charity shops or Goodwill type outlets to get them as cheap as possible, usually between £2 - £5
You can buy then new for as little as £6 but I like the challenge of finding them cheaply!
Diamond cutters can be purchased cheap on eBay.
I think that cutting the bottom out first will reduce the cutting vibrations whicj maybe the cause of cracking.
You may be right! Sometimes I've only made one cut and left the pouring spout as a lighting hole!
You guys never cease to amaze me... Wow! I would never have thought of doing something like this!
Colin do you cut right through and then continue all round, or do you sort of score it all round gradually getting deeper until right through
I cut round and round slowly, getting deeper with each rotation. It's slow work and it can go wrong. I need a new cutter as blut grind wheels can cause chips and make breakages more likely.
Чтобы при резке алмазным диском стекло не разбилось, нужно постоянно подавать небольшую струю воды на то место, где диск касается стекла. Срез получится ровным и без сколов.
THANK YOU FOR THAT gena88.
JUST A TRANSLATION OF THE ABOVE.
To prevent the glass from breaking when cutting with a diamond disc, you need to constantly apply a small stream of water to the place where the disc touches the glass. The cut will turn out smooth and without chips.
Ahhh, thanks @gena88 and @Tom Pedersen for the translation. Very useful.
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