1Zpresso J-Ultra Grind Settings for Espresso
How to read the J-Ultra dial, set zero, and land an espresso starting point, researched from the 1Zpresso manual, the 1Zpresso product page, and published grind charts.
Quick Answer
The 1Zpresso J-Ultra dial has 100 clicks per rotation, and each click moves the burr 8 microns. Published J-Ultra espresso ranges run from about 0.7.4 to 1.5.4, or 74 to 154 clicks from zero. Start near 1.1.0 (110 clicks) and move a few clicks at a time.
Using a different 1Zpresso grinder? The JX-Pro counts on its own scale, covered in the 1Zpresso JX-Pro grind settings guide. J-Ultra click numbers do not transfer to the JX-Pro, and JX-Pro numbers do not transfer to the J-Ultra.
How the 1Zpresso J-Ultra Dial Is Scaled
The 1Zpresso J-Ultra user manual states 100 clicks in a single rotation, with each click moving the burr 8 microns (0.008 mm), across five rotations in total. The 1Zpresso grind setting page breaks the J-Ultra dial into 10 numbers with 10 clicks per number.
| J-Ultra dial unit | Clicks | Burr movement |
|---|---|---|
| 1 click | 1 | 8 µm |
| 1 number | 10 | 80 µm |
| 1 rotation | 100 | 800 µm |
The number and rotation rows multiply out the manual's 8-micron click. Burr movement is not the same as particle size, so treat these J-Ultra figures as a scale, not a particle measurement.
How to Read 1Zpresso J-Ultra Settings Written as Rotation.Number.Click
1Zpresso J-Ultra settings are written as full rotations past zero, then the dial number, then extra clicks. The 1Zpresso grind setting page gives the example that 1.5 rotations on the J-Ultra means one full clockwise turn plus 5 numbers, or 150 clicks. The J-Ultra manual adds that a pyramid-shaped scale mark shows how many rotations the dial has made.
- 0.7.4 = 0 rotations + 70 + 4 = 74 clicks from zero
- 1.1.0 = 100 + 10 + 0 = 110 clicks from zero
- 1.5.4 = 100 + 50 + 4 = 154 clicks from zero
To convert any J-Ultra setting to total clicks, multiply rotations by 100, add the dial number times 10, then add the remaining clicks.
How to Find Zero on the 1Zpresso J-Ultra
Every J-Ultra espresso setting counts from zero, so zero has to be right before any number means anything. The J-Ultra manual describes the reference point:
- Turn the J-Ultra adjustment dial ring counterclockwise until resistance starts and the crank handle can no longer spin freely. That position is zero.
- Check that #0 on the J-Ultra dial aligns with the scale mark.
- Turn the J-Ultra dial clockwise from zero to open the burrs to a grind setting.
Stop at the first resistance when zeroing the J-Ultra rather than forcing the dial further, since the burrs are touching at that point. If your usual setting grinds differently after taking the grinder apart, see J-Ultra zero point after cleaning.
1Zpresso J-Ultra Espresso Starting Range
The J-Ultra manual refers owners to a separate grind chart instead of listing espresso numbers, so the ranges below come from Honest Coffee Guide's J-Ultra chart. Turkish coffee is included to show where the J-Ultra's finer end sits relative to espresso.
| Brew method | J-Ultra range (R.N.C) | Clicks from zero |
|---|---|---|
| Turkish | 0.1.7 – 0.8.9 | 17 – 89 |
| Espresso | 0.7.4 – 1.5.4 | 74 – 154 |
The J-Ultra espresso range spans 80 clicks, which is 640 microns of burr travel. A sensible first shot sits near the middle of that range, around 1.1.0, with the final J-Ultra setting depending on the beans, roast, and espresso machine. Before cleaning, log your setting from the chart above, then follow the manual's teardown order in how to clean and reassemble a 1Zpresso J-Ultra and re-find zero afterward.
Dialing In 1Zpresso J-Ultra Espresso One Step at a Time
At 8 microns per click, a single J-Ultra click is a very small change. Moving 3 to 5 clicks between espresso shots usually makes a difference easier to taste and time; narrow to single clicks once the shot is close.
- J-Ultra shot runs fast, sour, or thin: go finer by turning the dial counterclockwise, toward zero.
- J-Ultra shot runs slow, bitter, or harsh: go coarser by turning the dial clockwise, away from zero.
- Keep dose and yield fixed while adjusting the J-Ultra grind, and log each setting in R.N.C form so a good shot can be repeated.
For a full dial-in process, see how to dial in espresso on a new grinder, plus going finer and going coarser.
1Zpresso J-Ultra Specs That Matter for Espresso
- J-Ultra burr: a coated burr that 1Zpresso describes as optimized for espresso (1Zpresso).
- J-Ultra grounds capacity: 35–40 g per load (1Zpresso), enough for a double shot with room to spare.
- J-Ultra weight: 700 g (1Zpresso).
- J-Ultra adjustment: 8-micron steps across five rotations (J-Ultra manual).
- Moving over from an older grinder? Our 1Zpresso J-Ultra vs J-Max comparison shows how to convert J-Max click counts, since J-Max clicks are 8.8 microns and J-Ultra clicks are 8.
1Zpresso J-Ultra Espresso Settings FAQ
How many clicks is one rotation on the 1Zpresso J-Ultra?
One full rotation of the 1Zpresso J-Ultra dial is 100 clicks, and each click moves the burr 8 microns, according to the 1Zpresso J-Ultra user manual.
What is a good 1Zpresso J-Ultra espresso setting?
Published 1Zpresso J-Ultra espresso ranges run from about 0.7.4 to 1.5.4, which is 74 to 154 clicks from zero. Start near the middle, around 1.1.0 (110 clicks), then adjust by shot time and taste.
How do I find zero on the 1Zpresso J-Ultra?
The 1Zpresso J-Ultra manual says to turn the adjustment dial ring counterclockwise until resistance starts and the crank can no longer spin freely. At that point #0 should align with the scale mark.
Can I use JX-Pro or X-Ultra click numbers on the 1Zpresso J-Ultra?
No. The 1Zpresso J-Ultra uses 100 clicks per rotation at 8 microns per click, so click counts from other 1Zpresso grinders with different scales do not transfer.
Related: 1Zpresso JX-Pro grind settings · 1Zpresso X-Ultra grind settings · 1Zpresso K-Max grind settings