Cutting Pyrex

Terry Coombs

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Aug 22, 2014, 12:09:39 PM8/22/14

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My wife just bought some new pyrex baking pans , and the one we want to
use is just a hair too long to close the oven door on - this is a small oven
in a camper . My question is can I cut the little bit off so we can use it ,
or will it shatter like tempered glass ? I have both a wet saw for tile and
wet/dry diamond and masonry cutting discs for my angle grinder . I think the
best choice will be the tile saw ... but I've been wrong before .

--
Snag

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Paul Drahn

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Aug 22, 2014, 1:41:23 PM8/22/14

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As I recall reading a few years ago, today's Pyrex is not your
Grandmother's Pyrex. The company changed hands and today's Pyrex is no
longer tempered glass.

Paul

Frank

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Aug 22, 2014, 1:46:33 PM8/22/14

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Yes you can cut it the same as regular glass.
When glasses are made or heated to the melting point, tempering is just
slow cooling to avoid built in stresses from cooling too fast. The
surface glass should not be much different than the interior.

Roy

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Aug 22, 2014, 1:49:29 PM8/22/14

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> Snag

Screw around with that annealed edge on that handle may result in the
whole shebang shattering when it gets hot. Keep that in mind.

Best to buy a pan that fits the oven IMHO.

dpb

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Aug 22, 2014, 2:00:02 PM8/22/14

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On 08/22/2014 12:41 PM, Paul Drahn wrote:
...

> As I recall reading a few years ago, today's Pyrex is not your
> Grandmother's Pyrex. The company changed hands and today's Pyrex is no
> longer tempered glass.

It's tempered glass all right, just not _borosilicate_ glass of the
original Corning products. The trademark has been licensed to several
manufacturers, a few of the smaller of which still do use borosilicate
glass but the primary one doesn't. World Kitchen iirc is the spinoff of
Corning that uses a clear tempered soda-lime glass instead because it's
less expensive. It also isn't as heat-stress resistant and there've
been some complaints...

--

Oren

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Aug 22, 2014, 2:03:08 PM8/22/14

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On Fri, 22 Aug 2014 11:09:39 -0500, "Terry Coombs" <snag...@msn.com>
wrote:

( I looked just for giggles )

This guy is cutting Pyrex tubing.

<https://www.youtube.com/watch?v=8tbm8V9vyMk>

Some of the comments may be of some help. YMMV

Red Green

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Aug 22, 2014, 6:02:34 PM8/22/14

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"Terry Coombs" <snag...@msn.com> wrote in
news:6XJJv.6038$JH1....@fx08.iad:

If you try it, safety glasses and gloves. At least you'll be able to follow
up here if it goes sour.

Frank

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Aug 23, 2014, 3:17:39 PM8/23/14

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Back when I was in school, I would cut glass tubing of much smaller
diameter by scouring with a file, breaking and polishing ends by
abraiding with a piece of metal screen.

Also did some simple glass blowing with Pyrex like repairing flasks or
attaching joints. Would temper by diminishing flame and slowly removing
to get out stresses. Was not hard to work with.

trader_4

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Aug 23, 2014, 3:30:48 PM8/23/14

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Stop that right now! What? Be sensible and get a dish that fits the oven?

Oren

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Aug 23, 2014, 4:24:21 PM8/23/14

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This guy gives some tips.

Dispels myths of cutting glass bottles, making drinking glasses from
empty bottles. Neat method he uses.

<https://www.youtube.com/watch?v=sFXngPx3w3M>

Oren

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Aug 23, 2014, 4:57:06 PM8/23/14

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On Sat, 23 Aug 2014 12:30:48 -0700 (PDT), trader_4
<tra...@optonline.net> wrote:

>> Best to buy a pan that fits the oven IMHO.
>
>Stop that right now! What? Be sensible and get a dish that fits the oven?

...my bride decides what goes into her oven. I'm not bragging about
being oversized, but it may explain some things.

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