Which to buy · Every setting
1Zpresso J-Max vs KINGrinder K6
Two hand grinders cross-shopped at the same money. The J-Max counts 405 clicks; the K6 counts 240 clicks.
Which to buy
Choose the
J-Max if you…
- pull mostly espresso — 1Zpresso designed the J-Max burr for it
- want 90 clicks a turn, 8.8 microns each
- already own one, or are buying used — 1Zpresso no longer sells it new
Choose the
K6 if you…
- brew pour over as well — KINGrinder makes the K6 its pour-over pick
- want an external ring: 60 clicks a turn, 16 microns each
- may drive it with an electric screwdriver — KINGrinder gives the bit and torque in its manual
Shop links are affiliate links: BrewMark earns a commission if you buy through one, at no extra cost to you. The verdicts were written without regard to it.
1Zpresso's J series page marks the J-Max "Not Available" and links to the J-Ultra, which it still sells.
Sources: 1Zpresso — J series · KINGrinder — model comparison · KINGrinder — Store (Japan) · KINGrinder — K6 manual
| J-Max | K6 | |
|---|---|---|
| Brand | 1Zpresso | KINGrinder |
| Scale | Clicks | Clicks |
| Dial range | 0 clicks – 405 clicks | 0 clicks – 240 clicks |
| Burrs | Conical | Conical |
| Espresso → filter | 180.8 clicks | 71.6 clicks |
| Filter → coarse | 140 clicks | 57.5 clicks |
The same number means different things
Both grinders use a clicks, which makes it tempting to copy a number straight across. Setting 120 clicks sits at grind index 4.6 on the J-Max but 50.8 on the K6 — far enough apart to change the cup.
Converting a setting
If a recipe quotes a setting for one of these grinders, read across for the equivalent on the other. Rows are spaced evenly by grind size, not by dial number — on a conical burr those are not the same thing.
| J-Max | K6 |
|---|---|
| 84 clicks | 31 clicks |
| 150 clicks | 52 clicks |
| 202 clicks | 71 clicks |
| 229 clicks | 83 clicks |
| 247 clicks | 94 clicks |
| 271 clicks | 105 clicks |
| 304 clicks | 119 clicks |
| 340 clicks | 133 clicks |
| 370 clicks | 144 clicks |
| 388 clicks | 152 clicks |
| 396 clicks | 156 clicks |
| 400 clicks | 158 clicks |
| 405 clicks | 160 clicks |
| K6 | J-Max |
|---|---|
| 31 clicks | 84 clicks |
| 52 clicks | 150 clicks |
| 71 clicks | 202 clicks |
| 83 clicks | 229 clicks |
| 94 clicks | 247 clicks |
| 105 clicks | 271 clicks |
| 119 clicks | 304 clicks |
| 133 clicks | 340 clicks |
| 144 clicks | 370 clicks |
| 152 clicks | 388 clicks |
| 156 clicks | 396 clicks |
| 158 clicks | 400 clicks |
| 160 clicks | 405 clicks |
Side by side, by brew method
Where each grinder lands for the same brew, worked out from its own dial curve.
| Method | J-Max | K6 |
|---|---|---|
| Espresso | 123 clicks | 44 clicks |
| Moka pot | 194 clicks | 68 clicks |
| AeroPress (short steep) | 229 clicks | 83 clicks |
| Pour over — V60 / cone | 259 clicks | 100 clicks |
| Siphon | 272 clicks | 106 clicks |
| Pour over — flat bottom | 283 clicks | 110 clicks |
| Steep and release — Clever / Switch | 296 clicks | 115 clicks |
| Drip / batch brew | 240 clicks | 119 clicks |
| Cupping | 313 clicks | 122 clicks |
| Chemex | 338 clicks | 132 clicks |
| French press | 383 clicks | 150 clicks |
| Cold brew | 399 clicks | 157 clicks |
The shape of each dial
Where the connectors bunch, that grinder’s dial is compressed and single steps count for more. Comparing the two shapes tells you which gives finer control, and where.
1Zpresso J-Max
KINGrinder K6
Dialing in the J-Max
The J-Max trades coarse range for espresso resolution, and the click density near the fine end is the whole point of the grinder. If you are using it for pour over you are working in the middle of its range and will find it forgiving; if you are pulling shots, expect meaningful taste changes from two or three clicks. It will reach French press, but it is not what you bought it for.
Dialing in the K6
KINGrinder's all-rounder, and the value benchmark hand grinders get measured against. External adjustment, 60 clicks a rotation, at 16 microns a click — a coarser step than the 1Zpresso J and X series manage, and the one place you feel the price: espresso is dialable, but in slightly bigger jumps than a stepless grinder gives you. The 48mm stainless heptagonal burrs are what separate it from the rest of the KINGrinder line. If you only ever pull shots, the K4 is the espresso-specific sibling with titanium-coated burrs; the K6 is the one that covers pour over through espresso without being built for either.