1Zpresso K-Ultra Manual Coffee Grinder
The 1Zpresso K-Ultra represents the pinnacle of manual coffee grinding technology. It delivers ultra-precise grind settings through its external adjustment mechanism with 100+ clicks at 20 microns per step. Whether you’re brewing espresso, pour-over, or French press, this grinder ensures consistent grind quality and flavor clarity.
What sets the K-Ultra apart is its user-friendly build: foldable handle for compact storage, a magnetic catch cup for easy grounds transfer, and easy tool-free disassembly for cleaning. It’s housed in a stylish iron gray stainless steel frame and comes with a protective carrying case, making it perfect for both home and travel use.
Product Highlights & Features
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Foldable Handle: Streamlined for portability and storage.
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External Adjustment Ring: Over 100 clicks, 20 microns per click—ideal for dialing in espresso and filter brews.
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Heptagonal K Burr: 48mm stainless steel conical burr designed for clarity, body, and uniformity across brew methods.
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Magnetic Catch Cup: Effortless twist-release system; holds 35-40g of grounds.
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Robust Build: Calibrated burrs fixed securely for long-term use without wobble.
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Easy Cleaning: Completely tool-free disassembly for regular maintenance.
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Travel Ready: Includes premium carrying case for mobility and protection.
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Brew Versatility: Suitable for espresso, Turkish, pour-over, French press, and more.
Technical Specifications
| Feature | Details |
|---|---|
| Brand | 1Zpresso |
| Model | K-Ultra Iron Gray with Carrying Case |
| Color | Iron Gray |
| Material | Stainless Steel |
| Grind Adjustment | External ring, 20 microns per click (100+ clicks) |
| Burr Type | 48mm Heptagonal Stainless Steel Conical Burr |
| Grind Capacity | 35–40 grams |
| Product Dimensions | 7.28″ (L) x 2.36″ (W) x 7.68″ (H) |
| Weight | 1.5 lbs (approx. 700g) |
| Handle | Foldable, solid crank |
| Cleaning | Tool-free disassembly |
| Warranty | 1-Year Limited Warranty |
| Expected Lifespan | 100–200 kg grind capacity with general use |
| Use Cases | Espresso, Turkish, Pour Over, Cold Brew, etc. |
Final Verdict
The 1Zpresso K-Ultra is not just a hand grinder—it’s a professional-grade tool for serious coffee enthusiasts. It strikes the perfect balance between performance, portability, and aesthetics. While it sits at a higher price point than typical manual grinders, it justifies the cost with precision engineering, long-term durability, and a consistently exceptional coffee experience.
Whether you’re pulling espresso shots at home or brewing filter coffee in the wilderness, the K-Ultra delivers an elite level of grind consistency, flavor clarity, and tactile satisfaction. If you’re ready to invest in your coffee journey, this grinder is worth every penny.
Rating: 9.5/10 – Best-in-class manual grinder for all brew methods.
Nicolás Henríquez –
Game Changer for my Filtered Cups
This is the best and most versatile grinder I own. A huge step up from my Breville grinder in every sense. It’s more suited for my taste compared to my DF64 v2 for filtered cups, although I still prefer the former for espresso.Very comfortable to use and the grinding is surprisingly effortless and fast, even for espresso. My only issue is that the bottom compartment can sometimes get loose or fall, when I hold it too low (I have quite big hands though).Easy to clean and disassemble for calibration or maintenance. The included parts are great for these purposes as well, no need to get new cleaning tools for the moment.I’ve been using it for about 6 months and couldn’t be happier. I originally got it for brewing at work, but I like it so much that I carry it everywhere, so the case is especially appreciated.10/10 would recommend for anyone looking to level up their coffee for all methods, especially regarding cup clarity and fruity/nutty aromas. Excellent all-rounder and very versatile.
2 people found this helpful
Aaron Turner –
Great hand grinder!
Upgrading from my Hario Skerton Pro, this is a huge step up in virtually every way that I value:1. Super easy to to adjust the grind setting.2. Large burrs mean it is very fast and a lot less effort to grind.3. Magnetic catch bin is easy to dump your grinds for brewing4. Easy enough to clean5. Ergonomics are great.6. Feels very solid and high quality. Should last a long time.The only knock against it really is that if you do a full clean, then you have to recalibrate the burrs, but honestly it’s not that hard once you’ve done it a few times. That first time though is a bit confusing.I wouldn’t say this is a great travel grinder though… it’s pretty heavy (25oz or 700g) and not at all small, but that means you can grind more beans at once. If you’re a member of the church of the Areopress, you probably want the smaller version for air travel. But if you’re car camping or driving somewhere to an AirBnB, then this might be exactly what you’re looking for. Or perhaps you don’t want a large grinder sitting on your kitchen counter?Personally, I would use this for Areopress, pour over or French press…. if you’re doing espresso you’ll want to get something with more fine grain control over the grind setting.
9 people found this helpful
Chris M. –
visually consistent grind, easy to use & maintain, fits in Aeropress XL for travel
Well designed for ease of use. No problem disassembling for cleaning. Visually the grind appears consistent though I did not do a particle size analysis. Grinding felt easy at all settings I’ve tried so far (5.5-8.5). I am using it while traveling and have found it fits perfectly inside the plunger of an Aeropress XL. Yes, it will weigh a bit more than some travel-oriented grinders, but if you’re going to be bringing coffee gear with you anyway the weight differential is probably insignificant. Magnetic catch cup works perfectly. Operation is of course almost silent compared to any motorized grinder. It is expensive but it delivers consistency. It feels robust and precise.
3 people found this helpful
justme –
Amazing – French press tastes good at any grind size! (Huge sweet spot)
This has been a wonderful step on the coffee journey. I purchased it mainly for travel, French press / Pour over. Aeropress is too clean for me, experience like tea. I like body / experience.Started with grind size 8.5 for French press. Good. Creates a much thinner coffee than any other grinder I’ve used, but the taste was wonderful. Then I tried to find the lower limit. 7: Wonderful. 6: Wonderful. 5: like silt at the bottom of the French press, but even that still tasted good, better than any other grinder.It’s as if you can’t go wrong. Every grind size makes a fantastic cup. Everything is in the sweet spot. Never seen anything like this. Im a believer. This thing is like Christmas.And, as far as getting more body from my French press, I let it steep a little longer and it did get more soupy. That’s the problem with grinder reviews, you never know if the user knows how to make coffee.Other considerations: capacity for darkest of dark roast is 28g, bursting. 25g is more realistic. Cleaning has been easy, I use a conical shaped nylon wire brush scrubber on the inner wall, then an electric air blower (only at home). Then I use the brush that came with to get at the burs from the top. And I wipe the bottom edge of the inner burr with a rag to get the oils off. Seems to stay fairly clean after two weeks or so of daily use.1-month edit: used it for espresso, and it instantly replaced my electric burr grinder / Lebrew Sweet burrs (MiCoffee CF64V). I drink very dark French roast. The K-Ultra is not granular. One click is typically a 4-second difference. But it’s reliably pulling choco-thick shots. Since the first shot, my electric grinder hasn’t been used. Thinking about selling it.Now I’m looking into the j-ultra as well.
Meg –
Best grinder!
My husband and I have always loved coffee and wanted to dive into pour overs and other brewing methods outside of your typical drip coffee machine. We have a regular blade grinder that we thought was great before we cared about how our coffee came out. After doing a lot of research, this was one of the top recommend hand burr grinders based on our wants/needs. Maybe it’s the whole process, but the coffee came out amazing and you can really taste the flavors of the beans this way.This grinder is very easy to use and doesn’t take long to grind at all. It definitely takes some calibration at the start and every now and then sheer cleaning. It comes with a nice bag that makes it portable and you can use it wherever because it is very quiet. We plan to take it with us whenever we go camping. It might seem expensive, but it is great quality and worth every cent.
3 people found this helpful
Daniel Yates –
Surpasses all expectations
When my wife and I started down the path to a perfect pour over we started with the Baratza Encore. It was a great entry grinder (still our day to day), but when we would pick up a fresh bag of beans from a new roaster, or just wanted to switch it up in the morning, or I wanted to brew a cup at work, it wasn’t very convenient to clean out the beans or pack it back and forth in my bag.This was my second manual grinder, but it’s by a mile my favorite. It is really well made – solid build, tight tolerances, heavy, feels incredibly durable which especially matters for a portable grinder. Refined details like the magnetically attached catch cup, the very finely tuned grind size adjustment ring, the big wooden handle, the spring mechanism for folding the handle up, the way the grinding handle attaches magnetically, and how easy it is to disassemble and clean. I liked the inclusion on the brush and air bladder for cleaning. The whole unit is beautiful and I enjoy having it out in my office.For a small manual grinder with its ease of portability it’s still the grind performance that won me over. Perfect consistency in the grindings, and I’ve enjoyed being able to very easily fine tune the grind settings depending on the beans and brew method of the day. And it is incredibly fast. The resistance while grinding feels very manageable, never catches, and it takes about 30 seconds for a full 35-36g of beans.My only small ? is the amount of static I seem to generate. It’s kind of hard to get the clinging grounds off the cup or the sides of the grinder, which makes more of a mess than I expected. I’m going to try misting the beans to see if it helps.But that’s my only negative. I love and highly recommend it.
22 people found this helpful
Richard –
Exceptional Performance and Precision – A Top-Tier Manual Grinder!
The 1Zpresso K-Ultra has exceeded all of my expectations as a manual coffee grinder. From its sleek iron gray design to the thoughtful engineering behind every part, this grinder offers an outstanding coffee experience. The carrying case is a nice touch, making it perfect for traveling or keeping it safe in storage.One of the standout features is the foldable handle, which not only saves space but feels sturdy and comfortable when grinding. The external numerical adjustable setting is incredibly precise, allowing for seamless adjustments between different grind sizes. Whether you’re grinding for espresso or pour-over, the stainless steel conical burr delivers a consistent grind every time.It’s clear that a lot of care went into the build quality. The grinder feels durable and solid, and the overall grinding experience is smooth and easy, even when handling tougher beans. Plus, the disassembly for cleaning is simple and hassle-free.If you’re serious about your coffee and want a portable, high-quality grinder with consistent results, the 1Zpresso K-Ultra is an excellent choice. Highly recommend it for coffee enthusiasts!
6 people found this helpful
Amazon Customer –
A very impressive big well made hand grinder
Like this one, my third hand grinder. Like the magnetic cup, the exterior grind number setting scale, the size of the magnetic cup (will hold 40 grams, usually do 34 grams for two big cups…..the top of the grinder only holds about 28 grams at one time), & the folding handle. It took me 3 different You tube videos before I could properly Calibrate the number scale for grinding, but I eventually got. Use a setting of #9 for fairly Coarse Pour Over Hario Switch V60 coffee making. A Consistent grind in daily use. Heavy, sturdy construction….and its bigger than it looks on line. Impressive
2 people found this helpful
Rushmore Miles –
The very best hand grinder today
Purchased after a ton of research, used primarily for filter coffee, manual espresso on weekends (primarily macchiatos)The k-ultra is a best-in-class hand grinder capable of excellently uniform grinds at a huge range of sizes.I upgraded from a Timemore C3 and immediately noticed a tremendous difference in my cup.This grinder is capable of achieving extremely chocolatey and extremely fruity cups with ease.It’s a hand grinder, so the best results aren’t as repeatable as an automatic, but the highs are higher and lows aren’t that low.Magnetic catch cup isn’t nearly as worrying as I thought it would be in person, (that’s not to say I haven’t managed to spill it.)parts are of high quality and easy to clean, disassemble, reassemble, and zero.the handle part does get slippery after only a little use but it hasn’t popped off during grinding for me, it’s just looser than I’d like, not an issue though.After a few months of heavy daily use, I haven’t noticed any deterioration of any of the parts except the aforementioned top bit.The K-ultra does its job grinding fine enough to dial in espresso, and coarse enough to dial in filter coffees. I’ve tried with everything from turkish to french press, (and everything in between except moka pot and siphon) and can confidently say it’s good enough for all methods. I’m sure I could get 2% more quality from a 2k+ automatic monster but I’m more than happy with this thing.It’s easy to crank and doesn’t take too long even for large doses of espresso.Although thanks to Lance Hedrick I’m slow feeding now which more than doubles the grind time (but OMG the clarity.)
27 people found this helpful
Amazon Customer –
Is it better than cheaper hand grinders?
This is my second grinder to replace my cheap grinder, the HEIHOX, which uses common burr found in many grinders like Timemore C2. The quality and ease of setting the grind level is the best as mentioned by other reviews so will focus my review on taste and if it’s worth the upgrade.I have done tests between the two grinders using Aeropress and the results led me to conclude it all comes down to what you like. The cheap grinder gives sweeter and fuller body but less clarity, meaning no separation of various taste notes. K-Max tend to produce lighter body but more clarity because you can taste all the various flavors such as fruity and floral notes in fresh Ethiopian. If you like Ethiopian, then K-Max is great. I like having both grinders to be able to change things up but I enjoy both.Some have said it’s easy to clean and calibrate. I’m very technical person and I can tell you it’s not that simple. You need to read and follow directions precisely. I ended up locking it and had to send it to 1zpresso to unlock it. At first they weren’t going to cover the cost but did so after I showed them that following their instructions caused it. They agreed and they updated their instructions since after they asked me to review it. I have to say they did a great job supporting their product and they’re very friendly to work with, which you won’t get with cheap grinders.Is the K-Max worth it? Definitely! Its smooth and fast operation is the best so grinding experience is more enjoyable. It’s preferred for high end coffees because it is able to better extract flavor nuances from the beans while giving pleasant grinding experience.
31 people found this helpful