JX-Pro Manual Coffee Grinder: 1Zpresso's Espresso Specialist

The 1Zpresso JX-Pro is a manual hand grinder that does something most hand grinders struggle with: it grinds fine and consistent enough for genuine espresso. At around $160, it sits between budget hand grinders and premium options like the Comandante C40, offering excellent grind quality with a particular strength in the espresso range. If you want a hand grinder that handles espresso without compromise, the JX-Pro is one of the best options available.

I've been using hand grinders for years, and the JX-Pro is the first manual grinder that made me stop reaching for my electric espresso grinder on weekend mornings. The grind quality is that good. Here's everything you need to know about it.

What Sets the JX-Pro Apart

The "Pro" in JX-Pro refers to the upgraded adjustment system. While the standard JX has a solid click-based adjustment, the JX-Pro adds an external adjustment dial with finer steps between settings. This gives you roughly twice the adjustment precision, which matters enormously when dialing in espresso.

Each full rotation of the adjustment dial covers fewer microns of burr gap change compared to the JX. In practical terms, you can move between settings that change shot time by 1-2 seconds instead of 3-5 seconds. That's the difference between a good espresso and a great one.

The Burr Set

The JX-Pro uses 48mm stainless steel conical burrs. That's larger than many hand grinders in this price range (most use 38-42mm burrs). Bigger burrs mean faster grinding and more consistent particle sizes.

The burrs are precision-machined in Taiwan, where 1Zpresso is based. Taiwanese manufacturing in this niche produces quality on par with or better than most European competitors, which is why 1Zpresso has gained such a strong reputation so quickly.

Espresso Grinding Performance

This is where the JX-Pro earns its reputation. I grind at around 1.6-2.0 full rotations from fully closed for most espresso, and the resulting grounds produce even extraction with good crema.

Shot Consistency

Over a week of pulling shots with the JX-Pro, my shot times stayed within a 2-second window when using the same beans and the same setting. That's comparable to electric grinders costing $300+.

The particle distribution at espresso fineness is tight enough that channeling is rare. I noticed fewer bare spots on the puck bottom compared to cheaper grinders, which tells me the water is flowing through the coffee bed evenly.

Compared to Electric Espresso Grinders

Against a Eureka Mignon Notte (around $250 electric), the JX-Pro holds its own on grind quality. The electric grinder is more convenient, obviously, since you press a button instead of cranking for 60-90 seconds. But the taste in the cup is comparable.

Against a Baratza Sette 270 ($350 electric), the JX-Pro is arguably better for raw grind consistency. The Sette has known issues with grind uniformity that 1Zpresso simply doesn't have.

Filter Coffee Performance

The JX-Pro isn't just an espresso grinder. It handles pour-over, AeroPress, and drip coffee beautifully.

For V60, I grind at about 2.8-3.2 rotations from zero, and the cup clarity is excellent. Light roast single origins really shine because the consistent extraction pulls out the nuanced flavors without over-extracting bitter compounds.

French press at 3.5-4.0 rotations produces a clean cup with minimal silt. Cold brew at the coarsest settings works well too.

The only brew method I wouldn't use the JX-Pro for is large-batch cold brew, simply because hand-grinding 60+ grams gets tiring.

Build Quality and Ergonomics

The JX-Pro body is aluminum alloy with a matte finish. It weighs about 670 grams (1.5 pounds) and fits comfortably in one hand. The diameter is slightly wider than a soda can.

Grinding Comfort

The handle is steel with a wooden knob. The bearing system is smooth, with minimal resistance at medium grind settings. Espresso grinding requires more effort due to the finer burr gap, but it's manageable for the 18-20 grams you'll typically grind.

I time my espresso grinds at about 50-70 seconds for 18 grams. Pour-over dosing of 15 grams takes around 30-40 seconds. Neither feels like a workout.

Portability

The handle unscrews and stores inside the grinder body, which is a smart design touch. A carrying case is included. The whole package is compact enough for travel, backpacking, or office use.

I've taken the JX-Pro on camping trips and to hotel rooms. It performs identically whether you're at your kitchen counter or in the middle of nowhere.

JX-Pro vs. Other 1Zpresso Models

1Zpresso makes several grinder models, and the naming can be confusing.

JX vs. JX-Pro

The standard JX costs about $40 less and uses the same 48mm burrs. The only real difference is the adjustment system. The JX has fewer steps per rotation, making it better suited for filter coffee where micro-adjustment isn't as important. If you don't brew espresso, save the money and get the standard JX.

JX-Pro vs. K-Max

The K-Max ($200) is 1Zpresso's premium filter coffee grinder. It uses a different burr geometry optimized for medium and coarse grinding. For pour-over lovers who don't care about espresso, the K-Max produces slightly better filter results. For espresso, the JX-Pro wins.

JX-Pro vs. J-Max

The J-Max ($170) has the finest adjustment steps of any 1Zpresso model, making it the ultimate espresso hand grinder. But it sacrifices some coarse-grind quality. If you brew 80%+ espresso, consider the J-Max. If you split between espresso and filter, the JX-Pro is more versatile.

For a broader view of how the JX-Pro fits into the grinder market, check our best coffee grinder and top coffee grinder roundups.

Maintenance and Care

The JX-Pro is low-maintenance. Brush out the burr chamber every few days with the included brush. Every 2-3 months, remove the inner burr for a deeper cleaning with a stiff brush or compressed air.

The burrs are hardened stainless steel and will last for years of home use. 1Zpresso sells replacement burrs and parts directly, and their customer service has a strong reputation for responsiveness.

Don't grind anything other than coffee in it. No spices, no pepper. The burrs are calibrated for coffee bean hardness, and harder materials can damage them.

FAQ

Is the JX-Pro good enough for serious espresso?

Yes. It produces espresso-quality grinds that compete with electric grinders costing twice as much. Professional baristas have used JX-Pro grinders in competition settings. For home use, it's more than sufficient.

How many clicks from zero should I set for espresso?

This varies by bean and machine, but most people land between 1.4 and 2.2 full rotations from fully closed. Start at 1.8 rotations and adjust by 2-3 clicks until your shot pulls in 25-30 seconds.

Does the JX-Pro produce static?

Some static is normal, especially with lighter roasts and dry conditions. A few drops of water on the beans before grinding (the Ross Droplet Technique) eliminates static almost completely. I do this every time and never have grounds sticking to the catch cup.

Can I travel with the JX-Pro on a plane?

Yes. The compact size fits in carry-on luggage, and it's not a restricted item. TSA sometimes inspects it because it looks unusual on the X-ray, but it's never been an actual issue for me or anyone I know.

The Verdict

The 1Zpresso JX-Pro is the best value hand grinder for espresso available right now. It matches or beats electric grinders at twice the price for grind quality, and it handles filter coffee beautifully too. The trade-off is manual labor, about a minute of cranking per dose. If that doesn't bother you, the JX-Pro should be at the top of your list.