Dom,
I borrowed a Kyocera grinder for a few months and have had a bit of a play with a Hario grinder and I have to say that my impressions are pretty much the opposite of yours. You said that ...
coffeedom wrote:The Hario has nothing but the beans to keep the burrs in alignment, which is bad for fine grinds and even worse for coarse grinds because you get a lot of chunks.
Is it possible that you have the Hario and Kyocera the wrong way around in your post?
The Kyocera grinder that I used had an outer burr that was held in place very loosely by three plastic notches (ie. it was not physically attached to anything) and could rattle around quite a bit, with an inner burr that was affixed only to the shaft. This meant that both the outer and the inner burr rattled around.
The Hario grinder that I played around with had an outer burr that was fixed to the body of the grinder, with an inner burr that was affixed only to the shaft. This meant that the outer burr was fixed, but the inner burr rattled around.
The Kyocera grinder that I used delivered more fines in french press than any grinder that I have ever used and the particles produced at french press grind were of all sorts of different sizes. I found that french press coffee made with the Kyocera became bitter very quickly. I also found that it made quite bitter espresso. In fact, it was using this grinder that prompted me to try sieving the fines out of the grind.
I haven't really used the Hario much. I remember that the french press grind looked pretty uneven, but not as bad as the Kyocera.
I tried to organise a blind cupping of 12 cups, being four from the Kyocera, four from a cheap electric conical grinder and four from a mini electronic. I even got out my refractometer and calibrated the grind for each so that all grinders delivered the same TDS in the same time from the same amount of coffee - seems to me to be the only sensible way to set up such a test. Unfortunately, I only had paper cups to do it in and they imparted such an awful taste that the differences in grinders was rendered moot. That said, I do think that the electric grinders delivered a better cup than the Kyocera.
Cheers,
Luca