quick review, 1zpresso J-max
the good:
-- has very very fine adjustment steps. Adjustment is done by rotating the top ring, total adjustment is four and half turns. each turn has 9 #'s, (8.8um per #, according to izpresso), and 10 click per # (0.88um per click).
-- solid build, very heavy duty.
-- fast grinding, less than 1 minute to do 18g of dark roast at very fine settings.
the not so much:
-- getting the ground out is kind of messy. I wish the metal is un-coated stainless so there is less electrostatic build up. grounds stick to the inside of ground container and around the burr area, requiring using a small brush to get them out.
-- This grinder is really only suitable for fine grinds. Grounds from large setting (*****0.0, which is 4x90x0.88=316um) have kind of a flake/slice shape.
The extra-fine adjustment capability turns out to be a must for my espresso experiments. For the kind of beans I am using, the usable setting range is **3.5 to **6.5 ( ** means the 2nd turn, **3.5 is (90+35) x 0.88=110um, **6.5 is (90+65)x0.88=136um), just 26um difference, in this j-max there are 30 clicks in between for fine tuning.
overall very good as a reference grinder for espresso experimenting
the good:
-- has very very fine adjustment steps. Adjustment is done by rotating the top ring, total adjustment is four and half turns. each turn has 9 #'s, (8.8um per #, according to izpresso), and 10 click per # (0.88um per click).
-- solid build, very heavy duty.
-- fast grinding, less than 1 minute to do 18g of dark roast at very fine settings.
the not so much:
-- getting the ground out is kind of messy. I wish the metal is un-coated stainless so there is less electrostatic build up. grounds stick to the inside of ground container and around the burr area, requiring using a small brush to get them out.
-- This grinder is really only suitable for fine grinds. Grounds from large setting (*****0.0, which is 4x90x0.88=316um) have kind of a flake/slice shape.
The extra-fine adjustment capability turns out to be a must for my espresso experiments. For the kind of beans I am using, the usable setting range is **3.5 to **6.5 ( ** means the 2nd turn, **3.5 is (90+35) x 0.88=110um, **6.5 is (90+65)x0.88=136um), just 26um difference, in this j-max there are 30 clicks in between for fine tuning.
overall very good as a reference grinder for espresso experimenting
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