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Posted by Richard J Kinch on April 9, 2008, 1:02 am
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Steve W. writes:
> Just wander into any grocery store and buy as much Alum as you want. It
> is used in pickling and beer making as well as for metalworking!!!!
What wondrous place is this you live, that commonly has such yesteryear
supplies? The local Publix would get cross-eyed if you asked for pickling
or brewing ingredients.
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Posted by Jim Elbrecht on April 9, 2008, 9:02 am
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On Wed, 09 Apr 2008 00:02:59 -0500, Richard J Kinch
>Steve W. writes:
>
>> Just wander into any grocery store and buy as much Alum as you want. It
>> is used in pickling and beer making as well as for metalworking!!!!
>
>What wondrous place is this you live, that commonly has such yesteryear
>supplies? The local Publix would get cross-eyed if you asked for pickling
>or brewing ingredients.
Brewers stuff is mostly in specialty stores in my part of the world.
[but there are probably 5-6 within 20 miles]
Walmart carries a complete batch of canning/pickling supplies- and
most large grocers do pretty well in season.
I'm near Albany, NY. Publix looks like a southeast US chain-- and
no canning supplies? [are you in a city or in the suburbs?]
Jim
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Posted by Jim Wilkins on April 9, 2008, 7:23 am
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> Just wander into any grocery store and buy as much Alum as you want. It
> is used in pickling and beer making as well as for metalworking!!!!
> Steve W.
Alum is used to acidify soil. Check the farm or garden store.
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Posted by Michael Koblic on April 8, 2008, 6:19 pm
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> Well, Google so far has NOT been my friend.
> With a HSS 2-56 tap broken off in a lump of bronze I did my search -
> found reference to "jewellers' screw remover, a white paste". Looked all
> over the place in jewellers' webpages and couldn't find a thing.
> There was recent reference here to the use of alum (septic pencil), but I
> believe that was for use for a tap snapped off in aluminum.
> I could move the hole over and retap, but it would throw off the symmetry
> of the piece - however if the worst comes to the worst.
> Help!
> Mike in BC
Commiseration!
Recently I was in the same situation having broken a 6-32 tap in mild steel.
In the end I had to drill it out using 3 small diamond drills.
Not a situation I care to repeat...
Michael Koblic,
Campbell River, BC
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Posted by Leo Lichtman on April 8, 2008, 9:56 pm
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"Michael Gray" wrote: (clip) I could move the hole over and retap, but it
would throw off the symmetry
> of the piece)
^^^^^^^^^^^^^^^^^^^^^
Or you could drill out or core out an oversize hole, and then press in a
piece of bronze rod. Thisw would allow you to retap without losing the
symmetry.
Or how about heating the piece enough to anneal the broken tap, and then
drill it out?
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> is used in pickling and beer making as well as for metalworking!!!!