1Zpresso J-Max S Manual Coffee Grinder (Silver)
The 1Zpresso J-Max S is engineered for both performance and ease of use. It boasts a solid stainless steel construction with thoughtful design elements like a foldable handle, tool-free disassembly, and a 35g grind capacity. Whether you’re brewing at home or on the go, this grinder delivers exceptional grind consistency thanks to its high-quality burr and internal adjustment system.
Users consistently praise the J-Max S for its smooth grinding experience, sturdy build, and clean, minimal coffee retention. Designed primarily for pour-over coffee but versatile enough for French press and other methods, it’s a durable and elegant addition to any manual brewing setup.
Product Highlights & Features
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48mm Stainless Steel Conical Burr: Produces uniform grounds with less effort and greater grinding efficiency.
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30-Click Internal Adjustment: Fine-tune your grind size precisely for various brewing methods.
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Foldable Handle: Enhances portability and makes storage easy.
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Easy Maintenance: Tool-free disassembly for simple and thorough cleaning; includes a bonus cleaning brush.
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High Durability: Estimated lifespan of 100–200kg of grinding under general use.
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Excellent Build Quality: Almost entirely metal with tight tolerances and over-engineered construction for longevity.
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Low Retention: Very minimal coffee grounds left behind—what you weigh in is what you get out.
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One-Year Limited Warranty: Backed by 1Zpresso’s responsive customer support.
Technical Specifications
| Feature | Details |
|---|---|
| Brand | 1Zpresso |
| Model | J Manual Coffee Grinder (J-Max S) |
| Color | Silver |
| Material | Stainless Steel |
| Burr Type | 48mm Stainless Steel Conical Burr |
| Adjustment | Internal, 30 clicks per rotation |
| Recommended Brewing Methods | Pour-over, French Press, Moka Pot, Aeropress |
| Grind Capacity | ~35 grams (hopper holds ~15g at once) |
| Dimensions | 6.7” L x 2.2” W x 7.2” H |
| Weight | 1.85 lbs (839g) |
| Handle | Solid, Foldable |
| Cleaning | Tool-free disassembly, brush included |
| Warranty | 1-Year Limited |
| First Available | April 19, 2023 |
| Country of Origin | Taiwan |
Final Verdict
The 1Zpresso J Manual Coffee Grinder (J-Max S) strikes an excellent balance between performance, durability, and value. Its 48mm burr offers a smooth, consistent grind that rivals grinders twice its price. It’s compact, elegantly designed, and easy to maintain, making it a top choice for serious coffee drinkers who enjoy manual brewing methods.
If you’re looking for a grinder that delivers professional results with minimal hassle and premium feel, the J-Max S is hard to beat. From first-time buyers to seasoned coffee aficionados, it’s a grinder built to impress—and to last.
⭐ Final Rating: 9.5/10
Gabuc –
Impressive Machinery!
After wanting to get more into coffee, doing a lot of research on the topic resulted in the conclusion that buying a grinder to freshly grind coffee beans was one of the biggest upgrades. So, after a ton more research, I had actually settled on the KINGrinder K6, with the consensus being that it was the best bang for the buck. I had also heard that one of the biggest drawbacks of it was the disassembly, that it was very difficult to disassemble and put back together, for cleaning purposes. Since I never owned a grinder before (manual or electronic), I didn’t really have any context for what this would mean, hence I took a shot on it. Once it arrived, I was actually quite impressed by it (again, not really having proper context), everything seemed to be extremely well built. But, knowing my personality, I started to look into the disassembly/reassembly issue that I had heard about. After reading manuals, watching videos, and spending a decent amount of (semi-wasted) time learning about all of this, I tried to get the grinder disassembled, and failed badly. No matter what I tried, I couldn’t get the pin holding the entire assembly together to come out, of course I was trying to also be delicate with everything as I didn’t want to damage anything and risk not being able to return the item if it came to that. After spending enough wasted time and getting frustrated, I decided that it needed to go back, and in that regard I was glad I never got it disassembled, because I realized that it would have been very likely I wouldn’t have been able to properly reassemble it afterwards.So, back to the drawing board with more research. Ultimately, I decided to just spend the extra money to buy a 1Zpresso, and I picked the J Manual model because it seemed to be the best bang for the buck one for pourover that 1Zpresso has. The only thing I dislike about 1Zpresso grinders is the very confusing naming and changing of their lineup, for instance the J Manual was actually the Jx from previously with very minor upgrades. When the grinder arrived, it was actually even nicer than the KINGrinder K6 in overall feel, build quality, and impression. The first thing I tried was the disassembly and reassembly, which as I had already researched, was decently easy. Note that it wasn’t perfect, once you do a disassembly and reassembly, if you want the number dial to line up with the “zero” of the grinder, it is incredibly difficult to get right. However, if you just use the numbers as a reference point and don’t care that zero is zero, then it’s not a big deal.I have now since used the grinder almost daily for about a month and a half, and the grinder continues to be a pleasure to use. Grinding is seemingly very easy, satisfying, and foolproof. Everything is machined very precisely, and the entire unit is very solid. Overall, I feel that the item is worth the money paid, which for me is a very satisfying feel.
34 people found this helpful
Grace E. Ackerman –
Given That It’s a Manual Burr Grinder, It’s Very Easy to Turn
I grind my own beans each morning, and had a previous hand grinder. It used to take me about 120 – 150 turns to grind enough beans for my one cup of morning coffee. With this grinder, I only need about 30 or so turns, and not as much hand strength is required. This is important to me as I’m a senior with arthritis in my hands. I didn’t want an electric grinder as they are geared towards folks who want more than 1 cup. Also I’ve noted that oily beans don’t get along with the electric grinders, in some cases ruining them.I’m quite happy with the way my grinder functions, just have 2 gripes. The first is the documentation. Not one speck of useful info comes in the package. There’s just a card with a web address or something to scan that will take you there. I went to the site and tried to print the directions, but the way they were formatted I could only print a partial bit of them. I’m a dinosaur, I know. I like paper in my hands, something I can carry around with me. I don’t like having to go back to my computer when I want to clean the grinder. There are warnings of what to clean and what not to touch, so I like to have something to refer back to.The other thing, VERY minor, is that due to static electricity, there are always fine grinds all over the counter when I open the machine to take out the coffee. All in all, grinder is great, documentation not so.I changed my rating to 5 stars after using the grinder for over a month. It’s so easy to use. Earlier I said it takes 30 or so turns to make enough for a cup. It takes half that, and it’s so much easier to use and clean than my od grinder. It’s now one of my best-loved kitchen items.
5 people found this helpful
bruce levkoff –
Be ready to figure out how it works!
I just received the grinder and have used it a couple times. So far so good. Like many other reviewers, I found it difficult to locate the user manual. The QR code on the enclosed cardboard insert didn’t bring me to the right site. I had to return to the Amazon site to find out which model I had purchased (J) and then hunt for the right manual, comparing my product with the ones on 1zpresso’s site. Once I had the manual, I was able to figure out how to attach the handle, turn it up or down (not particularly easy) and how to adjust the grind setting. The device itself feels sturdy and I easily ground beans for a french press. We’ll see how it holds up, but initially I am quite happy with the purchase and the coffee it makes.
4 people found this helpful
fun4ever –
It’s worth it
Do you enjoy coffee often enough that you are willing to grind your own beans? Yea that’s me.Are you one of those people that have been using a cheap 10$ food processor to grind up your beans and have been just fine for the past couple years? Yea that’s me too, guilty as charged.Are you just not convinced with dishing out what seems to be a ludicrous amount of money just to manually grind beans? Yea, trust me, I get it.Well if you answered yes to any of these questions, know that I too, once were in your shoes. I love coffee, but not enough so that I am easily willing to shell out thousands, let alone hundreds of dollars on coffee equipment. That being said, this coffee grinder is absolutely phenomenal! I cannot believe how much my coffee experience has changed for the better.It feels incredibly well built and premium to the touch. The way this thing grinds is like a well oiled machine, I personally do not struggle in any way. If you know what a good socket wrench feels like, then you are in for a treat. It’s crazy to think that there are grinders that are twice this price. It already offers a fantastic user experience at this price point.So if you are one of those people who are looking to get a manual coffee grinder, but you are conflicted about getting the “better” and “more expensive” and “higher quality” version. I promise you won’t be disappointed starting here. There are a wide array of options to grind your beans in all kinds of preferred likeness, very easy cleaning with a brush (no washing here), fantastic build quality, and ease of use.Some cons that I have noticed that are not really a big deal to me, but for some of you, may be deal breakers.1. Again, I personally do not have this issue, but someone I know has small hands. You may not feel so comfortable trying to use it, if this is the case.2. Often enough, I find my self needing to go through two grind sessions, simply because I prefer more coffee in my cup or am making coffee for others as well. Which again, is not really a big deal, especially since it’s so easy to use. But for those who are looking to just grind once and be done with it, or grind large quantities. Probably won’t find it here. As I would imagine that it would be difficult to design this thing to grind more in volume and keep it at a size that is comfortable to handle for most people.
16 people found this helpful
gregory –
Great filter grinder in this price range!
I had heard some good things about the JX, so I decided to purchase one on Amazon. It is marketed as an espresso focused grinder, so I used it for about 1 month with the Cafelat Robot, alongside the BPlus Apollo that I already had.I love trying new hand grinders and have owned many including the Hario Skerton, Lido 2, Knock Feld 2, Kinu M47, BPlus Apollo, and now the 1ZPresso JX. Besides the Hario, the 1ZPresso is the cheapest of the bunch, so I was not expecting too much from this grinder.User Experience:Overall, using this grinder is pretty easy and straightforward. I mostly used medium-dark beans (think Redbird Espresso) with this grinder and it did not take too much force to turn. However, it did take about 45-60 seconds to grind an 18g dose of espresso, while the Apollo takes ~25-30 seconds. I was a bit disappointed by the grind time, given that it has 47mm burrs. I could fit ~23g of coffee beans in the top of the grinder, and the catch cup could hold those grounds without a problem. The rubber band provides good grip, and the wooden ball is easy to hold. The ball was pretty stiff at first, so I added some lubricant underneath and it spins quite well now. The grind size is adjusted like many other grinders, by holding the handle in place and turning a wing-nut type of piece on the bottom of the grinder. Clockwise for finer and counter clockwise for coarser.There are some quirks that I noticed. The grind size scale they have printed increments as you make the grind finer, which is opposite of every other grinder I have used. Also, at espresso fineness, it can take a while for the burrs to grab the last couple beans you are grinding, and that last 5% takes about 15% of the grinding time.Grind Quality:After using this grinder with the Robot, I am surprised that it is marketed as an espresso grinder. I was really not satisfied with the step size. Even with the forgiving nature of a manual lever, I found myself going from very easy to press to a grind that required Hulk-like strength with just 1 or 2 clicks. Visually it seemed to give some boulders (relative to the espresso grounds), and the cups often tasted quite muddy compared to the Apollo. I do not use this as my main espresso grinder.However, I decided to try it with the Bonavita Immersion Dripper (and Clever Dripper), and the results have been excellent! The grind consistency looks about on par with the Baratza Virtuoso at coarser grinds. I get very nice consistent draw down times, which usually means I don’t have a ton of fines clogging up the filter. I usually bring a Clever Dripper or Aeropress with me for travel, and now I will bring the JX as well. It’s pretty small and can do an excellent filter coffee grind.Build Quality:The build quality is a bit better than I expected. The knurling is a little rough, and the threads are not as precision machined as the Apollo, but it has a nice weight to it and I didn’t notice any play when trying to wiggle the shaft around. It also disassembles quite quickly, which is something that the Lido 2 and Feld 2 cannot do. The crank handle is extremely light, I actually thought it was plastic at first. The threads on the catch cup have a nice pitch to them, so it just takes a couple turns to put on or take off. I feel pretty confident tossing this in a suitcase.Value:This is really where this grinder shines. If someone has a strict budget of $130, this is one of the few options, and quite a good one at that. If you need something for espresso 100% of the time, then you should probably be looking towards the Lidos, Kinus, or BPlus.User Experience : 4/5Grind Quality : 4.5/5Build Quality : 4/5Value : 4.5/5
97 people found this helpful
Mary S. –
Delightful coffee grinding
This little machine is a joy to use. It’s easy to adjust, easy to use, and the double brush makes it easy to clean. The build quality is exceptionally high, which is a pleasant surprise in a world of slapdash products optimized for getting as many units out the door as possible. The retention is astonishing. All that’s left behind is a few tiny specks of grounds, so what you weigh in is what you get out. It’s made my espresso brews perfectly consistent!Regarding capacity: the collection cup holds 35 grams, but the hopper only holds about 15 grams of beans at a time.
2 people found this helpful
Mark –
Best grinder I have owned, not even close
Without a doubt the best manual grinder I have owned so far, this being my 6th.First, as an engineer, I really appreciate good design, both in terms of looks and function. The bearings within the grinder are the smoothest I have used so far. I think between the bearings, the stainless burrs, and the handle being a little over 5 inches from center of the grinder to center of the wooden grip (longer handle, better leverage, easier to grind), grinding is near effortless.Second, the aluminum housing is very solid, not thin gauge like other grinders. With the smooth operation of the grinding mechanism, the grinder is also the quietest manual grinder I have used as well. Since I am always up the earliest making coffee, silence is golden.Third, this is by far the fastest grinder I have used, grinding in well under half the time of my old Handground grinder. I haven’t timed it, but its definitely under 30 seconds with the hopper almost full compared to a little over a minute and a half for the Handground. That’s setting 3 on the JX versus setting 2 on the Handground for an aeropress, which visually gives about the same grind.Finally, the grind itself is very consistent in appearance.I would say the only down side, and not big enough to me to drop a star, is that it generates a little static when grinding. The first time I used it, when I unscrewed the bottom receiver, a lot of coffee clung to both the sides of the receiver and the bottom of the burr and was a little messy when I unscrewed it. So what I do now is once the grind is done, while I’m holding the grinder in my left hand, I give it a couple of hits with the butt of my right hand on opposite sides. When I open it up, all of the coffee is in the bottom of the receiver cup.Also, I had to wait for the JX to get back in stock and Anne at 1ZPresso was very helpful answering my questions and keeping me informed on progress, so big kudos to her.To me, having a great cup or three in the morning is a simple pleasure of life, and having the right tools is a key part of making that happen. I would highly recommend this grinder to anyone who feels the same. If you have owned other grinders, especially in the $10-$20+ range, I’m sure you will agree after the first time using it. There’s no comparison. It is worth the investment and looks great sitting on my bamboo aeropress stand on my countertop.
110 people found this helpful
Scott Stamile –
So fast! I don’t see why you would bother with an electric grinder.
Wow, this thing is just incredible. I can effortlessly grind 34g for pour over at 23 full steps. Less time than my (cheep) Capresso electric grinder. And way way faster than my old hand held Porlex.I haven’t timed anything but the Porlex was a burden. It felt like it took a long time, over a min, and was hard to turn and grip. The JX is Comfortable to hold and doesn’t feel like it’s going to fall apart while you’re grinding. It’s fast enough that you don’t notice that you’re grinding for very long I would say maybe 10 to 20 seconds for 34g. It’s perfect for daily use.I’m not an expert, but the grind consistency seems noticeably better than my Capresso and Porlex.I’ve seen people say you can’t fit 35g in the hopper. But it fits, I think because of the way the lid is designed it’s deceptive how little space in the hopper the lid takes up.The build quality and materials are really impressive. It looks exactly like it does in the photos with that thick matte machine aluminum. The silicone grip is functionally useful and does look good, it’s quality for sure, but I do feel like any time you include silicone on a product it does take the feel of the materials down a notch.This things is super heavy, which does make it feel quality but it is a little unwieldy you would do some damage if you dropped this thing.My one small usability gripe – in order to adjust the grind setting you have to have the lid on the hopper to hold the axle in place, otherwise it will just spin. It’s a minor issue, And arguably a feature since if there are beans in the hopper and you flip the thing over without the lid, they’ll fall out. But it does catch me once in a while.I mainly invested in this so I could have a high-quality grind in the morning without the noise waking up my kids. Ham grinders are way quieter and you can get a much higher quality grind for price is similar to an inexpensive electric grinder. Traditionally the problem with hand grinders is there inconvenient to use, but this one is so fast that I don’t mind having to do the work yourself. This is an excellent daily use grinder and it’s replaced my electric on the counter.
8 people found this helpful
Amazon CustomerAmazon Customer –
Works well; looks good naked
I was skeptical, given that the 1Zpresso J is many times more expensive than my previous grinder. However after two months of daily use, I’m impressed by its solid build quality, the speed with which it grinds coffee beans, and its good looks. It’s a worthwhile investment.My three year old JavaPresse frustratingly met its demise when some of its critical components, made of plastic and held in place with glue, came undone. I was primed for an upgrade and I liked how all the functional elements of the 1Zpresso J were made of metal, which set it apart from some others on the market. I ordered one.This thing is over-engineered. And I love that about it. Made almost entirely of metal, with a surprising heft and featuring tight and precise tolerances, I’m confident that this thing will outlive me.And it works well. In less than 5 seconds and just a few turns of the crank, my coffee beans are prepped and ready for their soak in the french press. Meanwhile, using the Javapresse felt like a workout at times, taking closer to a minute to complete its task and requiring far more rotations of the crank.It looks good. Especially after removing the silicone sleeve.Buy it for life. This thing will confidently grind coffee beans for decades.
15 people found this helpful
ADK_MailmanADK_Mailman –
I am totally amazed
I don’t typically write reviews but I feel I must for this. I will say I am not that experienced with hand grinders this being my second one. I go back and forth between Espresso and Pour Over. I have a fairly high end setup for espresso. An Expobar Office and paired with a Baratza Vario. Going back and forth between those 2 is problematic. Once you get a grinder dialed in to a given bean it is best to leave it. In my opinion anyway. So I decided to get a cheap manual grinder. One that is usually in any top manual grinder articles. I don’t feel the need to name it. I was quite happy with it for pour over. it was fairly quick I thought. It would take about 2 minutes to grind a 30 gram dose. I experimented with it for espresso and it totally failed. Took close to 4 minutes to grind an 18 gram dose on its finest setting. I only got 2 bars. So I accepted it for what it was. A grinder that could be used for brews that require more coarseness than espresso.Flash forward a year or so and I decided to do research on what is currently out there. The 1Zpresso piqued my interest based on a best grinders article I read as well as reviews both here and elsewhere. I was totally amazed. For starters it is very stylish to me and feels like a premium product. But what really amazed me was the performance. I was able to grind my usual 30 gram dose in about 30 seconds. And the grind was certainly more consistent than my other. For my next test I attempted espresso with it using one of the recommended settings for espresso. It was not easy and required a fair amount of effort and took me nearly 2 minutes. As soon as I tamped it I could tell that it was very fine and actually thought it would choke my machine. I was right. I Could not believe that a $130 hand grinder could choke out a prosumer grade machine. As with any grinder a given setting might work with one bean but not another. So I made an adjustment I felt would get me closer. My second grind was less than a minute and was much easier to do. It was still a tad too fine. I was at 10 bars and it took about 50 seconds to pull the shot. One more small adjustment and I was there. Got my 9 bars I was looking for and it was even easier to grind. It took me 48 seconds to grind the 18 gram dose at the proper setting. To me that is amazing.I have read that if espresso is your main thing then you should get the pro model due to it having a greater range of settings which allows you to dial in the grind more accurately. I can’t vouch for that since I have not used the pro but I felt I was able to dial my bean in with the settings available.My only caveat is that the hopper is small. I can only grind about 20 grams at a time although the distribution chamber can hold up 35 depending on the bean. But it is very easy to quickly reload. It is not a big enough caveat for me to rate it anything less than 5 stars. I can’t imagine anyone being disappointed in this grinder
53 people found this helpful