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OT: Paging the angle-grinderisti
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Any thoughts on how easy it would be to cut the top off this dewar
to remove the inner container (cut about the level of the stays holding
the handle on). I'm thinking about turning it into an incinerator... It's
stainless steel, walls probably 1.5 mm or more (the stays are 3 mm thick;
I'd have thought it'd take a good welder to stick them onto sheet much
thinner).
What size angle grinder should I buy, and what sort of disks (and how
many to cut the full 5-foot circumference)?
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Stainless is a bit of a brugge to cut. However, if I were to do it I'd
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If you have not yet bought, consider a reciprocating saw instead.
With a fine toothed blade it will do a better job and be easier to
control:
http://www.hilti.co.uk/holuk/modules/prcat/prca_navigation.jsp?CATE_NAME=Reciprocating%20Saws[1]
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use whatever angel grinder I had handy and get some cutting discs which
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It must be the devils own job working with you.
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are much thinner than grinding discs, making the kerf thinner and thus
the amount of material to remove commensurately less.
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ACK. The cutting discs will come in something around 1.0 mm, and one should do
it. Get two, in case one breaks; cheap enough.
Lessee... at random:
Though come in 1.0mm and 0.8mm as well.
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very thin discs won't fit all grinders.
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I've only ever met one that wouldn't clamp a thin disc properly and that
was an ancient one.
You can always bodge it with a cardboard washer.
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Cardboard washers came with my thin cutoff discs -- 0.8 mm I think they are.
Also, an old flat disc, worn down all the way, also works well as washer and
extra support.
Thomas Prufer
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And failing that, a cut down/worn out original disc.
I've never had a disc that couldn't be fitted to a grinder EVER.
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I've a steel cut-off saw - great toy, takes 14" discs with a 1" centre.
Except I want to use it for some ceramic pipe. I've got the discs but
the sodding metal eyelet thing in the middle's fallen out.
Still - bodging it together seems to have worked well enough.
The other trouble is it trips the RCD each time I use it. Or used to
till I opened the plug and removed the earth wire.
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I had to machine a bit off one of the arbor pieces on the grinder here
(which pre-dates thin discs) to make it grip the 1mm ones.
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Couldn't you just flip the piece over? It's what I do with one of the
grinders. The others all have a seperate arbor.
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both the previously-identical pieces had a stepped side and a flat side:
used to fit thin discs by turning the one of them over.
however, the very thin discs are too thin for that to work. Hence the
modifications.
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Use ear protection, thin metal will be noisy; all the other protection as well,
them discs do fly apart occasionally.
And watch where the sparks go, they'll permanently burn themselves into glass,
glasses, tile etc.
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Make sure your trousers are outside the cuff of your boots. Sparks down
the insides of boots are no fun at all, though more of a promble with
welding. Worst is welding spatter in your ear; the sound of it crackling
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Ooh! There's nowt worse'n a welding promble....
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as it fries your aural hair is most unpleasant.
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Absolutely. Hurts, too. Then there's the strange effect when one blows
one's nose and one can feel a cold draught through one's earhole...
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I bet the smell isn't too pleasant either.
I generally get welding platter down the front of my shirt or up my shirt
sleeve. I think gloves may help there though.
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Behind a watchstrap isn't nice, either.
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I rarely wear them and never near machinery.
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Yeah, well, neither do I these days - and that's why.
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Hmm, better than up the nose where you could smell it happening.
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Thomas Prufer
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I seriously doubt it's 1.5mm, more like 0.8 I'd guess.
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Depends how much fun you want to have, about 2 dozen metal cutting disks
should do it.
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Er, don't forget **plastic**....
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Go and find someone with a plasma cutter and get them to do it for
you. You end up with a neat job and they'll probably charge less than
you'd pay for a decent angle grinder.
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4 and half inch grinder and a single 1mm cutting disc. Actually, but a few
more coz they're god fun, but you'll only need one to cut that tank.
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WUN went through about four 125 mm disks, but they were 3 mm thick.
It seemed at times to be melting its way through rather than cutting.
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Not sure what sized disc to use, but will it be an empty cylinder or
full? :)
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It's a vacuum jacket, YTC! 'Cept there's no vacuum in it (so I guess
it's empty...).
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Had you considered that various bits of clean air legislation might
prevent you from operating something such as an incinerator in your
borough? Check it out.
Mind you I am sure you are allowed a barbie so as long as you throw a
prawn in there you should be fine.
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