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Topic: Rust on grinder burrs (11 msgs / 191 lines)
1) From: Brian Kamnetz
I'd welcome some opinions regarding burrs on used, high quality (e.g.,
Zassenhaus, Kym) hand-operated grinders. Many times the burrs on used
grinders are coated with crud and rust, and so is the shaft that turns
the burrs. How big a deal is this? Is it likely that rusty burrs are
ruined? How likely is it that a going-over with a wire brush will
return them to an attractive and useful state? Or, is the "hardened
steel" likely to be pitted, and result in the burrs not working very
well?
Thanks,
Brian
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2) From: Bill
Great question, Brian!  I hope that somebody has some input on this one...
 I would be curious as well.  Hopefully someone knows.bill in wyo
On Sun, May 25, 2008 at 2:31 PM, Brian Kamnetz  wrote:
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3) From: Matthew Price
You could try running a hopper full of rice through and see what
happens.  After you've run through a full load send through just a
little more and inspect both that last bit of ground rice and the
grinder itself for remaining rust.  If the test batch of rice has junk
in it I'd keep grinding rice until no more debris is coming out.
Otherwise, if you can't cut the rust with rice but the grinder still
does a good job on coffee I wouldn't worry about it.
Matthew
On Sun, May 25, 2008 at 3:31 PM, Brian Kamnetz  wrote:
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4) From: Brian Kamnetz
Matthew,
I don't yet have a grinder with rusty burrs. I was wondering whether
to consider such a grinder, say on eBay, for purchase.
Actually, I haven't laid eyes on such a grinder. I did buy a Trosser
that someone had used for grinding nuts. The oily crud cleaned right
off and the burrs were pristine underneath. So, in actually, when I
look at pictures of burrs that are discolored, I don't in fact know
whether they are rusty, or simply coated with crud that will clean off
to reveal pristine burrs.
Brian
On Tue, May 27, 2008 at 9:55 AM, Matthew Price  wrote:
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5) From: Matthew Price
I'd bid low and maybe take a chance.  Are auctions like that going for
the similar prices to ones that feature grinders in better condition?
I probably wouldn't take a chance on something like that without at
least being able to see it in person.  It depends on the model, but
the zass in general is difficult to disassemble and being old and
neglected doesn't make that any easier.
Matthew
On Tue, May 27, 2008 at 2:41 PM, Brian Kamnetz  wrote:
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6) From: Allon Stern
On May 27, 2008, at 3:41 PM, Brian Kamnetz wrote:
<Snip>
Maybe they're rusty because some bleary-eyed coffee deprived soul  
accidentally poured the carafe of water into the grinder instead of  
the brewing apparatus. Hey, it's been known to happen :)
If you buy a used grinder, plan on new burrs. End of story. You don't  
know how long it has been since they've been replaced (likely never),  
how much usage they've seen, or how they've been abused. New burrs  
are inexpensive, and when put in a cleaned up used grinder will  
restore like-new performance.
-
allon
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7) From: Brian Kamnetz
Allon,
I would certainly plan on new burrs for a used electric grinder, but
are new burrs available for hand grinders? I hadn't heard of that
before.
Brian
On Tue, May 27, 2008 at 5:14 PM, Allon Stern  wrote:
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8) From: Allon Stern
On May 27, 2008, at 5:25 PM, Brian Kamnetz wrote:
<Snip>
Whoops, my bad - I didn't actually remember that part of the original  
conversation.
I have a crusty old no-name hand grinder. It really does a lousy job.
-
allon
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9) From: Brian Kamnetz
I watch hand grinders on eBay pretty regularly, and sometimes the
seller includes a photo of the burrs, but more often not. I sometimes
ask the seller about the burrs, and usually get a quite understandable
answer. I certainly don't need any more grinders, but I bid on them
sometimes and occasionally win, but try to restrict bidding to the
burrs that look new. I think the price is more highly correlated with
the exterior appearance.
Brian
On Tue, May 27, 2008 at 3:46 PM, Matthew Price  wrote:
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10) From: raymanowen
The pictures of Zass burrs look like the Solis Maestro burrs- are they? No
have Z, but if I did, I'd check it out. Many grinder marques have those same
basic burrs. -ro
On Wed, May 28, 2008 at 8:14 AM, Brian Kamnetz  wrote:
<Snip>
-- 
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976
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11) From: Matthew Price
The basic configuration is the same - straight through nesting cones -
but the Maestro's are much larger and better supported.  The zass
burrs' great flaw is that the upper burr doesn't have anything to
center it at the bottom.  In a perfect world the force of the grinds
would keep the burr evenly spaced all the way around, but in reality
it has a tendency to spit chunks from one side or the other when that
pressure gets momentarily out of balance.
On Sat, May 31, 2008 at 1:31 PM,   wrote:
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