1Zpresso JS: A Detailed Look at This Mid-Range Hand Grinder
The 1Zpresso JS is a manual coffee grinder that sits in the middle of 1Zpresso's lineup, slotting between the budget-friendly Q2 and the premium K-Plus. It uses 48mm steel burrs and an internal adjustment mechanism with numbered settings, making it a solid option for pour-over and drip coffee drinkers who want consistent grinds without spending $300.
I picked up the JS about a year ago as a secondary grinder for travel, and it's become one of my go-to recommendations for people who want something better than a Timemore C2 but don't need the espresso precision of a JX-Pro. Here's everything I've learned from daily use, including where it shines and where it falls short.
Build and Design
The JS follows the same general design language as other 1Zpresso grinders. You get a stainless steel body with a matte finish, a foldable crank handle, and a magnetic catch cup on the bottom. The whole thing weighs about 600 grams, which is noticeable in a backpack but not heavy enough to be a problem.
What Sets It Apart
The foldable handle is the first thing you notice. Unlike the JX-Pro's straight handle that you need to remove for storage, the JS handle folds flat against the body. This makes it more compact for travel and eliminates the "where did I put the handle" problem that plagues every hand grinder owner at some point.
The adjustment dial is internal, located beneath the burr set. You remove the top cap, lift out the handle assembly, and turn the numbered ring to change your grind setting. Each click represents a small, repeatable adjustment. I count about 40 clicks per full rotation, and most pour-over recipes fall between 20 and 30 clicks from zero.
The build quality feels premium without being excessive. There's no wobble in the handle, no play in the adjustment mechanism, and the magnetic catch cup snaps on with a satisfying click.
Grind Quality and Consistency
This is where the JS earns its keep. The 48mm steel burrs produce surprisingly uniform particle distribution for a grinder in the $100 range. I've compared side by side with my Comandante, and while the Comandante still wins on absolute consistency, the gap is smaller than the price difference suggests.
For pour-over and drip, the JS delivers clean, well-defined flavors. Light roasts show off their origin characteristics without too much muddiness. Medium roasts come through balanced and sweet. I've brewed with it on a V60, Kalita Wave, and Chemex, and it handles all three well.
Where It Struggles
The JS is not an espresso grinder. It can technically grind fine enough for espresso, but the steps between settings are too large for dialing in. You'll find yourself stuck between "too fast, sour shot" and "too slow, bitter shot" with nothing usable in between. If espresso is your thing, look at the JX-Pro or the J-Max instead.
French press at the coarse end is adequate but not exceptional. The burr geometry is optimized for the medium range, so you get a few more fines in coarse settings than I'd like. It works, but dedicated coarse grinders do it better.
How It Compares to Other 1Zpresso Models
The 1Zpresso lineup can be confusing because there are so many models with similar-sounding names. Here's where the JS fits:
- Q2 ($80ish): Smaller 38mm burrs, fewer grind settings, best as a travel grinder. The JS grinds faster and more consistently.
- JX ($100ish): Similar price, but uses a different burr geometry. The JX is slightly better for espresso-range grinding, while the JS edges ahead for pour-over.
- JX-Pro ($160ish): The go-to for espresso. More adjustment steps, finer control. Overkill if you only brew filter coffee.
- K-Plus ($300+): Premium model with a larger 48mm burr set and titanium coating. Noticeably better grind quality, but three times the price.
If you brew mostly pour-over, drip, or AeroPress, the JS hits a sweet spot. You're getting 80% of the K-Plus performance at a third of the cost. For a broader comparison, check out our best 1zpresso grinder roundup.
Daily Use and Ergonomics
Grinding with the JS takes about 45 to 60 seconds for a 20-gram dose at a medium-fine pour-over setting. That's roughly comparable to other 48mm hand grinders. The handle rotation is smooth with minimal resistance, and I don't get the "crunchy" feeling that cheaper grinders sometimes produce.
The grip is comfortable enough for daily use. The body diameter is sized for an average hand, and the knurled texture on the handle provides decent purchase even with wet hands. My only complaint is that the body can feel slippery if your hands are oily from handling beans.
Cleaning and Maintenance
Cleaning is easy. I blow out the burr chamber with a squeeze bulb after each use and do a full disassembly cleaning every two weeks. The burrs come out without tools, and reassembly takes about two minutes once you've done it a few times.
The burrs themselves don't need seasoning or special treatment. They came sharp out of the box and have stayed that way after a year of daily use. 1Zpresso uses hardened steel that holds its edge well.
Who Should Buy the 1Zpresso JS
The JS makes the most sense for these people:
- Pour-over enthusiasts who want better grind quality than a Hario or Timemore without spending Comandante money
- Travelers who need a compact, foldable grinder that performs well
- People upgrading from blade grinders who want their first quality burr grinder
- AeroPress users who want precise, repeatable settings in the medium-fine range
It's not the right choice if you need espresso precision, if you grind more than 30 grams at a time regularly, or if you want an electric grinder experience. For a wider look at options across all price points, check our best coffee grinder guide.
FAQ
How many grind settings does the 1Zpresso JS have?
The JS has approximately 40 clicks per full rotation of the adjustment dial. In practice, this gives you more than enough resolution for filter coffee methods. Each click produces a noticeable change in grind size, though adjacent settings may taste very similar in the cup.
Can the 1Zpresso JS grind for Turkish coffee?
It can get close to Turkish fineness, but I wouldn't recommend it. The adjustment steps are too coarse for proper Turkish coffee, which needs a powder-fine grind. A dedicated Turkish grinder or the 1Zpresso J-Max with its finer adjustment increments would serve you better.
How long do the burrs last on the 1Zpresso JS?
1Zpresso rates their steel burrs for several years of daily home use. Based on my experience, I'd estimate 3 to 5 years before you notice any meaningful degradation in grind quality. That translates to roughly 1,000 to 2,000 grinding sessions. Replacement burr sets are available directly from 1Zpresso if needed.
Does the 1Zpresso JS come with a carrying case?
The JS typically ships with a basic carrying pouch, not the hard cylinder case. If you want the hard case for travel protection, you'll need to purchase it separately. It's worth the extra cost if you fly with your grinder regularly.
Final Thoughts
The 1Zpresso JS is a well-built, reliable hand grinder that does pour-over and drip coffee really well. It's not trying to be everything to everyone, and that focus is its strength. If you brew filter coffee daily and want consistent results without fussing with an electric grinder, the JS delivers. Just don't expect it to pull double duty as an espresso grinder, and you'll be happy with it.