In-depth review
1Zpresso JX-Pro Review: the Espresso Hand Grinder Benchmark
In-depth review of the 1Zpresso JX-Pro: 12.5-micron clicks, 48mm burrs, numbered top dial, and whether it is worth the premium for espresso.
1Zpresso JX-Pro
A 48 mm manual grinder with 200 clicks of adjustment for espresso and filter.
- Burr type: 48 mm stainless conical burrs
- Adjustment: 200 clicks, 12.5 microns per click
- Capacity: 35 g
Our verdict
The JX-Pro is the most justifiable premium in hand grinding. Its 12.5 microns per click and numbered top dial give espresso brewers the repeatability that cheaper grinders cannot, and the 48mm burrs keep grinding fast. The trade-offs are real: it costs more than the KINGrinder K6, it is heavy for travel, and moving between espresso and pour over means many clicks. But for its intended job, dialing in espresso by hand, it has no equal in this guide. Compare it head-to-head in our K6 vs JX-Pro comparison, or see where it ranks in the best manual grinders roundup.
What we like
- 48 mm stainless conical burrs rival electrics costing far more
- 200-click internal adjustment at 12.5 microns per click suits espresso
- 35 g capacity covers a double shot with room to spare
- Foldable crank handle keeps it packable for travel
What to watch out for
- Hand grinding 18 g for espresso takes real effort
- Internal adjustment requires counting clicks from zero
- No hopper; it is strictly single-dose
Who it is for
Espresso brewers who dial in by hand and want shot-to-shot repeatability, plus pour-over drinkers who want one premium grinder for everything.
Adjustment precision
The JX-Pro's defining spec is 12.5 microns per click across 200 clicks per rotation. In practice that means a one-click change is subtle enough to nudge a sour shot toward sweet without overshooting, which is exactly what espresso dialing requires. The numbered top dial (10 numbers, 20 clicks each) lets you record settings like 1-4-0 and return to them exactly, something grinders with unmarked rings cannot do.
Burrs and grinding speed
The 48mm stainless steel burr set grinds an 18g espresso dose in a reasonable time with moderate effort, noticeably faster than 38mm grinders like the Timemore C2. Particle consistency at fine settings is the JX-Pro's strong suit; at coarse settings it is good but the grinder's heart is clearly at the fine end of its range.
Build and daily use
The all-stainless construction feels dense and precise, with no flex in the body during grinding. The 35g hopper covers double shots and standard pour overs in one fill. The foldable crank handle keeps it reasonably compact, though at its weight this is a countertop grinder, not a travel one. The top dial is small, so expect a learning curve reading settings in the first week.
How it stacks up
Against the KINGrinder K6, the JX-Pro offers finer clicks (12.5 vs 16 microns) and a numbered dial the K6 lacks, but costs more and adjusts from the top rather than the K6's external ring. Against the Timemore Chestnut C3, the JX-Pro's 48mm burrs and espresso-grade clicks are in a different league, though the C3 is lighter, cheaper, and simpler for coarse-only brewers. Buy the JX-Pro when espresso precision is the job; buy the K6 when versatility per dollar matters more.
Key specifications
- Burr type
- 48 mm stainless conical burrs
- Adjustment
- 200 clicks, 12.5 microns per click
- Capacity
- 35 g
- Handle
- Foldable crank
- Catch cup
- Magnetic
Sources: 1Zpresso official product specifications, Major retailer product listings, Published coffee gear reviews
What owners report
Owners praise
- Owners praise the 48 mm stainless conical burrs for rivaling electrics costing far more
- Many owners like the 200-click internal adjustment at 12.5 microns per click for espresso
- Owners say the 35 g capacity covers a double shot with room to spare
Common complaints
- Some owners find hand grinding 18 g for espresso takes real effort
- Owners note the internal adjustment requires counting clicks from zero
- A common complaint is having no hopper, since it is strictly single-dose
Also consider
KINGrinder K6
A 48 mm hand grinder with external adjustment and a heptagonal burr.
- Burr type: 48 mm heptagonal stainless conical burr
- Adjustment: 240 external clicks, 16 microns per click
Sources: KINGrinder official product specifications, Major retailer product listings, Published coffee gear reviews
Check current priceTimemore Chestnut C3
The C2 formula with sharper S2C steel burrs for faster, cleaner grinding.
- Burr set: 38mm S2C 660 steel
- Capacity: 25g
Sources: Timemore official product specifications, Major retailer product listings, Published coffee gear reviews
Check current priceResearch-based assessment. TheBrewLedger has not hands-on tested this product; this evaluation synthesizes manufacturer specifications, retailer documentation, and published expert reviews.
Questions, answered
Is the JX-Pro good for pour over as well as espresso?
Yes. The 48mm burrs produce consistent medium grinds, and the fine clicks let you tune pour-over recipes precisely. The only annoyance is the many clicks between espresso and pour-over settings.
What do the numbers on the dial mean?
The dial shows 10 numbers with 20 clicks each, 200 clicks per full rotation. Lower numbers are finer. Most espresso lands in the 1 to 2 range and pour over in the 3 to 5 range, though beans vary.
JX-Pro vs KINGrinder K6: which for espresso?
The JX-Pro, for its 12.5-micron clicks and numbered dial. The K6 is the better value all-rounder. Our full comparison covers every difference.
Is it worth the premium over the Timemore C2?
For espresso, absolutely: the C2 is not designed for fine grinding. For pour over only, the C2 delivers most of the experience for much less money.