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Is Zassenhaus 156 Kneemill suitable for espresso

Postby Psyd on Wed Apr 30, 2008 5:00 pm

So, I picked it up from another coffee enthusiast, with the caveat that I wanted it 'if it can get me twenty-five to thirty second doubles on my Silvia'. If I dial it down' to where the burrs are constantly in contact (and any tighter would be the two burrs against one another under tension) I can just get an acceptable pull on the Silvia in thirty seconds. My feeling is that this can't be that great for the hand-grinder, and that it probably won't last, as it's on the very edge of acceptable performance at the start.
Am I worried over nothing, or am I justified in thanking this person for their offer, but returning the grinder as not fit for the task I described?
Does anyone else have a recent vintage 156 kneemill that makes great espresso grind without full burr contact? My PeDe will choke my Silvia and my Astoria if I get the burrs to touch.
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Postby cannonfodder on Thu May 01, 2008 11:11 am

I tried a hand mill once, once being the operative word. It was one sold by one of the hand mill enthusiasts on this site and was adjusted for espresso. While it was novel to use, it was a far cry from what I get from a good electric grinder. The cup was more monotone, better than trying to use a whirling blade of death grinder, but not what I would call a good espresso grinder. The novelty lasted for a couple of shots, and then it went away. I think a Mini produces a much better shot and it does not even come close to what you get from a big conical. Sorry hand grinder guys, but I just don't like them. They may work good for press pot at the camp site, but I don't care for the espresso it produced. I am sure some do better, but I don't want to get a dozen grinders to find one that works. By then, I could have gotten a Mazzer for the same $$, just my two cents, take it at face value.
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Postby petunia on Thu May 01, 2008 5:08 pm

That's interesting, Psyd... I ordered the same model from Sweet Maria's only to be told they had just sold out. I ended up getting the open-hopper model and I'm slowly dialing it in for my Silvia. The SM site says you can run the burrs together without damaging them, which sounds weird - maybe the much slower RPM makes it okay, I dunno.

The two concerns I have right off the bat are (1) the burrs aren't centered with each other exactly - when cranking, the sound of them meeting comes & goes, and so the grind isn't all that consistent, especially for coarse; and (2) the adjustment likes to wander a little bit. There may be ways to fix these things, I just don't know what they are.

That said, it still beats the pants off my Virtuoso. I have neither cash nor counter space for a Macap (or, ok, Mazzer :) ) just yet, but luckily I think this Zass will hold me for a while while I get my technique down etc.

I think this because last night's final pull was 24 sec, and this morning's (grinding halfway between the 24 sec point and the choke point) was 38 sec. I don't have a tamper that fits the basket yet, and I can tell my distribution is way off, but these are the best results so far. Thanks to the Zass and reverse temp surfing, I've finally made shots I actually enjoyed drinking. But as a n00b, my standards (and palate, budget, etc.) are surely vastly different from cannonfodder's, so take it as you will.
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Postby Psyd on Fri May 09, 2008 4:05 pm

cannonfodder wrote:I tried a hand mill once, once being the operative word.... ...Sorry hand grinder guys, but I just don't like them.


You tried one hand grinder one time and you're ready to give up an entire world's worth of possibilities?
My PeDe competes well with either of my Mazzer Majors. The complexity of the cup, the evenness and lack of clumps, and the consistency of the pull is amazing.
My question wasn't whether hand grinders are up to the task, they are, with exceptions (the one you used and possibly the one I have) but whether the recent minting of the 156 is up to the task. Or, perhaps it's just my recently minted 156.
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Postby cannonfodder on Sun May 11, 2008 11:06 pm

Yup, but keep in mind that this was not a grinder off the antique store shelf, but a proven and adjusted grinder tweaked for espresso. It produced an OK shot but lacked the range and definition of a larger grinder. If I was camping or had nothing else, I would use it, but I am not going to replace my other grinders with one.
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Postby Psyd on Mon May 12, 2008 8:42 pm

cannonfodder wrote:Yup, but keep in mind that this was not a grinder off the antique store shelf


My antique (ca. 1950's?) PeDe is showing my Majors that they aren't so tough. The newer Zass is the one that I'm having issues with. I'm just looking for other Zass users to see if adjusting the thing right down to where the burrs are in constant contact with one another to get something that is even possible for espresso is to be expected, or if my grinder is not up to Zass' usual standard.
In other words, do I return this one and try another 156, or is it endemic in the product, and I should really try something else?
I'm pretty sure that there are hand grinders out there that can give your larger electric grinder a run for its money. It's just unfortunate that the first one that you used wasn't up to the task. I'm saying that you ought try a few others before you give up on the whole genre.
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Postby orwa on Tue May 13, 2008 6:12 am

Psyd wrote:... If I dial it down' to where the burrs are constantly in contact (and any tighter would be the two burrs against one another under tension) I can just get an acceptable pull on the Silvia in thirty seconds. My feeling is that this can't be that great for the hand-grinder, and that it probably won't last, as it's on the very edge of acceptable performance at the start ...


I think that your judgment is a good one. I was leaning toward the espressomühle model, which I am not sure if it's the one you're talking about or not (that one has the model number "156 ES SW"), but went with the Turkish model for it being the one tried and most trusted. On my ugly, cheap-looking Turkish model, the grinder can do a very long pull at the point just before the "two burrs" are put "against one another under tension". Note that I use hard beans, which usually require finer settings. The Ethiopian large, fragile beans I buy on the other hand can be ground satisfactorily under a relatively-loose setting, even though I am using a lever, which supports your conclusion.

ADDITION: Regarding hand-crank grinders in general, I would like to say that though I tried a very little number of grinders myself, and though the Mazzers were not of those grinders that I have tried, I have a planar-burr grinder that is using the Mini burrs and operating under an rpm of 450, which I couldn't use to get a cup that is totally devoid of bitterness, no matter how much I tried. I claim that I can easily distinguish astringency and charcoal flavours from bitterness... Which is an awful brewing imperfection that I cannot tolerate, whereas these other attributes I can accept as taste varieties. The point here is that although the Zassenhaus grind doesn't look fancy to me, that is, it contains a lot of considerably large granules, and upon tamping shows a surface that is indicative of a lot of unevenness in the grind... Its grind "tastes" best (when the burrs are relatively clean), and I sincerely cannot detect bitterness, with a cup that tastes the same way a fresh grind would smell.
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Postby peacecup on Tue May 13, 2008 6:52 am

I need not mention I don't entirely agree with cannonfodder on this issue! In fact, having used one once, I humbly suggest his opinion is rather overstated! (i.e. I don't like espresso - I tried one from a Krups once :evil: )

If the Zass was expensive and money a concern I might return it. If you can afford it as an experiment, just keep using it with the burrs touching and see if it gets better. My "theory" is that the grind will become finer and more even as the burrs wear, but I have no real evidence for this. Only a handful of old grinders that make have been used for years and still make great espresso (and are, at this moment, unfortunately, somewhere on the Atlantic Ocean between N. America and Sweden).

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Postby orwa on Tue May 13, 2008 8:19 am

I read your theory in some other post, and what I would like to say is that it depends on whether the hand grinder we're discussing does use a ball bearing, or any sort of an axle-centering mechanism or not. If it doesn't, then the wear will be uneven, dependent on the usage patterns, and will most probably make the situation worse over time. However, in the case of your old grinders, which may be using such a ball bearing, the wear will indeed help achieving finer settings over time, though I cannot comment upon the change (if any) in grind quality. In the case of that model however, the 156, it's one of the poor designs where the axle is long and there is no bearing at the bottom, hence resulting in a considerable horizontal play upon grinding and uneven wear of the burr's grinding surface. I personally do not recommend keeping it, unless you may not have a better alternative.
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Postby cannonfodder on Tue May 13, 2008 10:38 pm

To each his own. As a said, it did produce a shot but I personally did not care for it, but if my two choices were a whirly blade, preground or the hand mill, I would go with the hand mill in a second. If I had to purchase 10 units to find one that worked, I would not bother, but then again, I don't think the manufacturer intended it to be used as an espresso grinder but a drip/press pot grinder.

P.C. Weren't you in Alaska? Now Sweden?
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