1Zpresso · Dial-in chart
1Zpresso J-Max grind settings
Where to set the 1Zpresso J-Max for every common brew method — worked out from this grinder’s own dial curve rather than a one-size-fits-all chart.
The shape of this dial
The top line is the universal grind index every BrewMark recipe uses. The bottom line is the J-Max’s own dial. The connectors show how one maps onto the other.
Settings by brew method
Start at the recommended setting, brew, then move within the range by taste. Sour or weak means go finer; bitter or harsh means go coarser.
| Method | Setting | Range |
|---|---|---|
| EspressoFine. Aim for a 25–30s shot and adjust from there. | 17 clicks | 10 clicks – 26 clicks |
| Moka potFiner than filter, coarser than espresso. No tamping. | 30 clicks | 26 clicks – 38 clicks |
| AeroPress (short steep)For 1–2 minute recipes. Go coarser for longer steeps. | 46 clicks | 38 clicks – 58 clicks |
| Pour over — V60 / coneThe reference point for most published pour-over recipes. | 67 clicks | 60 clicks – 76 clicks |
| Pour over — flat bottomKalita, Orea and similar. Slightly coarser than a cone. | 76 clicks | 70 clicks – 84 clicks |
| Drip / batch brewAutomatic brewers. Coarser to suit the longer contact time. | 82 clicks | 76 clicks – 90 clicks |
| ChemexThe thick filter needs a coarser grind to avoid stalling. | 90 clicks | 84 clicks – 98 clicks |
| French pressCoarse. Too fine here is the usual cause of a muddy cup. | 104 clicks | 97 clicks – 114 clicks |
| Cold brewCoarsest setting you have. 12–18 hours of contact. | 125 clicks | 114 clicks – 140 clicks |
How much room you have to adjust
That is the resolution you actually have to work with on the J-Max. Where the number is small, a single step moves the cup more than you would expect — so change one at a time and taste before moving again.
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.
Coming from another grinder?
Convert any recipe’s grind setting to your J-Max
If a recipe quotes a setting for a different grinder, our converter maps it onto the J-Max’s dial using the same curve this chart is built from. 80+ models supported.
Open the grind converter →How these numbers were worked out
Every grinder gets mapped onto a shared 0–100 grind index, where 0 is espresso-fine and 100 is the coarsest useful setting. Five reference points on the J-Max are measured against that scale — espresso, moka, filter, French press and coarse — and the settings in between are interpolated.
Because the J-Max uses conical burrs, the curve between those points is fitted with a monotone cubic spline rather than straight lines. Conical burr dials are rarely linear, and the spline guarantees the curve never doubles back — a coarser index always produces a coarser setting.
The result is that “medium-fine” resolves to a real number on this grinder rather than a vague instruction. It is a starting point, not a guarantee — burr wear, bean density and roast level all move the target, which is why every row above gives a range as well as a number.
Take this chart with you
Every setting on this page, on your phone at the grinder — plus a note of what actually worked last time on your J-Max. Free on iOS.
Get the iOS appCompare the J-Max
Side-by-side dial charts and a conversion table, so a recipe written for one grinder becomes a real number on the other.
Grinders that dial in like this one
Similar burrs, scale or dial range — which means settings translate between them more predictably than across the whole catalog.