1Zpresso K-Ultra: Grind Settings for Every Brew Method

82 clicks on a 1Zpresso K-Ultra for a V60 with a light roast. 66 clicks for an AeroPress with a medium roast. 107 for a French Press with a dark roast. Concrete numbers are more useful than any "medium-fine" label you'll find online.

The K-Ultra is the all-round grinder in 1Zpresso's K series. Heptagonal burrs with the "K Burr" geometry, 100 clicks per turn of the dial, and 9.3-micron resolution per click. 1Zpresso markets it for every method: filter (V60, AeroPress, Chemex, French Press) and espresso too. In practice, it's most at home on filter, where the heptagonal burrs and fine dial pay off most.

This guide gives you the click range for every brew method, organized by roast level. These are starting points. Every coffee is different, so you'll want to adjust based on the profile. But a concrete range is always better than a vague description.

If you have a different hand grinder, we also have dedicated guides for the Comandante C40 (the premium filter reference, 12 clicks per turn) and the 1Zpresso JX-Pro (40 clicks per turn, the all-round sibling with an espresso focus).

Quick Reference Table

Starting points are for a washed coffee with a medium roast. For light roasts, subtract 3–4 clicks. For dark roasts, add 3.

How the Clicks Work

• 10 clicks per number, 10 numbers per turn = 100 clicks per full turn.
• ~9.3 microns per click, measured empirically on real beans (different from the manufacturer's published figure).
• Fewer clicks = finer grind. More clicks = coarser grind.

To find zero: tighten the dial until the burrs touch and the handle gives resistance. That's click 0. Count up from there.

For French Press and methods that need coarser settings, you'll cross past the first full turn. The K-Ultra has a turn indicator, so 107 clicks reads as "1 turn + 7."

V60

This is where the K-Ultra does its best work. The 9.3-micron resolution per click lets you find the exact sweet spot for each coffee, something a 12-clicks-per-turn grinder can't offer.

• Light roast: 82 clicks.
• Medium roast: 86 clicks.
• Dark roast: 89 clicks.

Target brew time: 2:30 to 3:30 for a 15g dose with 250ml water. If it drains too fast and tastes sour, go 3–5 clicks finer. If it stalls and tastes bitter, go coarser.

AeroPress

The AeroPress is forgiving on grind, so it's a good way to try new coffees without overthinking the setting.

• Standard method: 63–70 clicks, 1:30 to 2:00 steep.
• Inverted method: 58–65 clicks, 2:00 to 2:30 steep.
• Fine grind, short steep: 48–55 clicks, 1:00 steep. More body, closer to espresso character.

Chemex

The Chemex filter is thicker than a V60 filter, so it absorbs more oils and slows the brew down. You need to grind a bit coarser to compensate.

• Light roast: 92 clicks.
• Medium roast: 95 clicks.
• Dark roast: 99 clicks.

Target brew time: 3:30 to 4:30 for a 30g dose with 500ml water. If the drawdown takes more than 5 minutes, go 5 clicks coarser.

French Press

Coarse grind. The metal mesh filter lets fine particles through, and those particles keep extracting while you drink. Grind too fine and you end up with a muddy, over-extracted cup.

• Light roast: 101 clicks (1 turn + 1), 4:00 steep.
• Medium roast: 104 clicks (1 turn + 4).
• Dark roast: 107 clicks (1 turn + 7).

Espresso

1Zpresso markets the K-Ultra as all-round, and it technically covers the espresso range (24–34 clicks). But the K Burr geometry is tuned for filter extractions, not for the pressure of espresso. The 9.3-micron-per-click resolution is enough for fine adjustments. Even so, some prefer dedicated espresso grinders to maximize control in that narrow range, like the J-Max (8.8 μm/click) or the J-Ultra (2.7 μm/click).

If you pull the occasional shot at home, the K-Ultra holds up well. If espresso is your main method, look at the J-Ultra or J-Max from the same brand.

• Range: 24–34 clicks.
• Light roast: 24 clicks (finer, for more extraction).
• Medium roast: 28 clicks.
• Dark roast: 34 clicks.
• Adjust 1–2 clicks at a time so you don't overshoot your shot time.

Moka Pot

• Range: 50–58 clicks.
• Light roast: 50 clicks.
• Medium roast: 53 clicks.
• Dark roast: 57 clicks.

Start at the starting point and adjust from there. If the brew sputters and hisses, it's too fine. If it comes out pale and watery, it's too coarse.

How Roast Level Changes Your Setting

Same grinder, same method, same dose, and yet a light roast and a dark roast can be 6–7 clicks apart on the K-Ultra. Light roasts are denser and harder, so the water needs more time and surface area to extract the sugars, and that's why you grind finer. Dark roasts are softer and more soluble, they give up their flavors faster, and you grind coarser to avoid harsh, ashy notes.

The simple rule for the K-Ultra: medium roast = base setting. Light = roughly 3–4 fewer clicks. Dark = roughly 3–4 more clicks. That's all you need to remember.

For espresso this pattern is even more pronounced: a light roast calls for a finer grind than medium (24 vs 28 clicks) to pull more sweetness from the dense beans of a light roast.

How to Dial In

The table gives you a starting point. Here's how to find your ideal grind from there:

1. Pick the starting point for your method and roast level.
2. Brew and taste. Brew time is a clue, but taste is what matters.
3. Adjust 3 clicks at a time. Sour and thin? Go finer. Bitter and heavy? Go coarser. With the K-Ultra's resolution, 1 click changes little; 3 starts to show.
4. Change one thing at a time. Don't adjust grind and dose at the same time.
5. Write it down. Or use Coffee Master to log your brews automatically.

Most coffees land within 6 clicks of the starting point on the K-Ultra. If you're way off, check your water temperature or dose before going further.

Maintenance

The K-Ultra is built to last, but the burrs need a quick clean now and then.

Weekly (if you grind daily): unscrew the top chamber, take out the inner burr, and brush everything with a dry natural-bristle brush. A clean paintbrush works great. Monthly if you use it less often.

A few things to keep in mind:

• No water on the burrs. Brush only. The K-Ultra's steel is durable, but moisture accelerates wear.
• The adjustment dial doesn't need maintenance. It's sealed.
• On your first clean you might find leftover residue from factory break-in. That's normal.
• A light tap on your palm after grinding shakes out any grounds stuck inside. K-Ultra retention is very low thanks to the heptagonal burrs.
• New burrs need a break-in period. The first 300–500g may grind a bit unevenly while the edges polish themselves. Use whatever beans you have on hand.

Common Issues