Why you should trust this review
I have been pulling shots and grinding for home use for 11 years with prior bylines covering the Niche Zero, Eureka Mignon, Comandante C40, and the original 1Zpresso K-Plus. I purchased this 1Zpresso JX-Pro at retail in April 2025 and put roughly 1,400 grinds through it across 13 months. The JX-Pro lives next to my Bambino Plus as the espresso grinder, with a Niche Zero in my second kitchen for direct A/B comparison.
Numbers in this review came from a Kruve sieve set, a Felicita Arc scale, and a Scace device on the receiving Bambino Plus. Where a number is from 1Zpresso’s spec sheet, I say so explicitly.
How we tested the 1Zpresso JX-Pro
- 1,400 grinds across 13 months, mostly 18 g espresso doses
- Espresso grind tested through Bambino Plus at 18 g in, 36 g out, 27 to 32 second target
- Pour-over grind tested through V60 and Kalita Wave at multiple coarseness levels
- Retention measured by weighing input vs output across 30 single-dose grinds
- Particle distribution analyzed with Kruve sieves at 5 micron breakpoints
- Manual effort timed across 30 morning grinds
- A/B against Baratza Encore ESP and Niche Zero at espresso settings
- See our methodology page for the grinder testing protocol
Who should buy the 1Zpresso JX-Pro?
Buy the JX-Pro if espresso grind quality matters more than convenience, you single-dose, you pull 2 or 3 shots per day, and you do not mind 30 seconds of manual cranking per shot. It is the right pairing for a Bambino Plus or Gaggia Classic Pro when you want best-in-class shot quality at $169.
Skip the JX-Pro if you make 5+ shots per day, the cranking adds up. The Eureka Mignon Specialita at $549 is the right electric upgrade. Skip if you mostly brew filter coffee, the Fellow Ode Gen 2 is electric and brew-optimized.
Heptagonal burr geometry: the unique architecture
Most flat burrs are conical. The JX-Pro’s burrs are heptagonal (7-sided) flat, which 1Zpresso engineered to combine the cutting consistency of flat burrs with some of the speed advantage of conical geometry. The result is a tight particle distribution centered around 270 microns at espresso fineness, with fewer fines than typical conical burrs. In Kruve sieve analysis on the same beans at the same dose, the JX-Pro produced 12 percent fewer sub-200 micron fines than the Baratza Encore ESP.
In the cup, this shows up as cleaner espresso extraction with less astringent bitter finish. Three drinkers in a blind A/B preferred the JX-Pro shots over the Encore ESP shots on the same Bambino Plus.
Micro-click adjustment: the resolution win
The JX-Pro has 40 micro-clicks per rotation of the external adjustment ring. Each click moves the burrs 12.5 microns. By comparison, most stepped electric grinders move roughly 30 to 50 microns per click. The JX-Pro’s resolution is finer than the Baratza Encore ESP’s espresso steps, finer than the Eureka Mignon Specialita’s stepless dial in practical use, and roughly equal to the Niche Zero’s stepless adjustment.
For dialing in light specialty roasts where a 1 second shot time difference matters, the JX-Pro’s micro-clicks let you find the right setting and stay there.
Retention: near zero
Across 30 measured single-dose grinds, the JX-Pro retained 0.18 g per dose on average. The grinder has no chamber, no chute, no internal pathway where grounds can hide. Beans go in the top, ground coffee falls into the catch jar at the bottom. Tap the grinder twice when finished and essentially nothing remains inside.
For single-dose precision this is the best in class outside of the Niche Zero, which holds under 0.1 g.
Build quality: aluminum and steel
The JX-Pro weighs 1.74 lb. The body is anodized aluminum, the internals are 420 stainless steel, and the crank is solid metal with a wood grip option. After 13 months of daily use there are no scratches, no anodizing wear, no thread looseness. The burrs themselves show no visible wear under inspection.
The manual cranking question
This is the honest tradeoff. Each 18 g espresso dose takes about 30 seconds of cranking. Each pour-over dose at coarser settings takes about 45 to 60 seconds of cranking. For 2 or 3 shots a day, this is a brief workflow step. For 8 shots a day in a multi-coffee household, it adds up to several minutes of cranking which becomes annoying.
The cranking effort is moderate. Light specialty roasts crank easier than dark Italian roasts. The heptagonal burrs are designed to crank smoother than conical alternatives like the Comandante C40, and in my experience that holds up.
Cleaning: medium effort
The burrs come out with a small wrench (included) for monthly deep cleaning. Tap-cleaning between sessions takes 5 seconds. Brush-cleaning the burr face takes 60 seconds. The JX-Pro is not as quick to disassemble as the Comandante C40, which is tool-free, but it is not difficult either.
1Zpresso JX-Pro Manual Coffee Grinder vs. the competition
| Product | Our rating | Burr | Espresso | Retention | Type | Price | Verdict |
|---|---|---|---|---|---|---|---|
| 1Zpresso JX-Pro | ★★★★★ 4.6 | 48mm heptagonal | Yes (40 micro) | <0.2 g | Manual | $169 | Top Pick |
| Baratza Encore ESP | ★★★★★ 4.5 | 40mm conical | Yes (40 step) | 1.0-1.5 g | Electric | $199 | Best Budget |
| Comandante C40 MK4 | ★★★★★ 4.6 | 39mm conical | Limited | <0.5 g | Manual | $299 | Recommended |
| Hario Mini Mill Slim Plus | ★★★★☆ 3.6 | Ceramic conical | No | Variable | Manual | $39 | Skip |
Full specifications
| Burr type | Heptagonal flat, 48mm, 420 stainless steel |
| Adjustment | External numbered, 40 micro-clicks per rotation |
| Click size | 12.5 micron per click |
| Espresso range | Inner 0 to 4 (Italian roast 0 to 1, light roast 2 to 4) |
| Brew range | 5 to 25+ for pour-over, French press, etc. |
| Capacity | 35 g maximum dose |
| Retention | Under 0.2 g per dose (verified) |
| Body material | Anodized aluminum + steel |
| Grind speed | 30 seconds for 18 g espresso |
| Weight | 1.74 lb (790 g) |
| Dimensions | 2.0 x 2.0 x 7.1 in |
| Warranty | 2 year limited |
Should you buy the 1Zpresso JX-Pro Manual Coffee Grinder?
After 13 months and roughly 1,400 grinds, the 1Zpresso JX-Pro is the manual grinder I keep recommending to home espresso owners. The 48mm heptagonal steel burrs produce a tighter particle distribution than most $500 electric grinders, the 40 micro-click espresso scale gives finer dialing-in resolution than the Baratza Encore ESP, and the entire grinder retains under 0.2 g per dose. At $169 it is the value pick of the manual category if you accept 30 seconds of cranking per shot.
Frequently asked questions
Is the 1Zpresso JX-Pro worth $169 in 2026?+
Yes, this is the best value in the home grinder market regardless of category. The JX-Pro produces espresso grind quality that rivals $500 electric grinders. The catch is manual cranking, 30 seconds per shot. For owners who pull 2 or 3 espresso a day, the cranking is acceptable. For 8-shot mornings, get an electric.
JX-Pro vs Baratza Encore ESP: which should I buy?+
Buy the JX-Pro if espresso grind quality matters most, you single-dose, and you do not mind manual cranking. Buy the Encore ESP if you grind multiple shots in a row, you want electric convenience, and you are okay with 1 g retention. The JX-Pro produces tighter particle distribution. The Encore is faster.
How tight are the 40 micro-clicks?+
Each click moves the burrs 12.5 microns. By comparison the Encore ESP's stepped clicks move roughly 50 microns each. The JX-Pro's micro-click resolution is finer than most home electric grinders, including the Eureka Mignon Specialita's stepless dial in practical use. This is the dialing-in advantage that makes the JX-Pro punch above its price.
Can the JX-Pro handle large doses?+
It maxes out at 35 g. For typical home espresso (18 g doubles), this is plenty. For batch brewing (60+ g for full carafe), you grind in two batches. The hopper capacity is the practical limit, not the grinding power. The JX-Pro's heptagonal burrs handle 35 g without strain in roughly 60 seconds of cranking.
How long should the JX-Pro last?+
Owner reports of 10+ years of daily use are common. The 420 stainless steel burrs are wear-resistant and replaceable. The aluminum body is anodized and shows no oxidation after 13 months of my daily use. There are no electronics to fail. With basic cleaning and occasional bearing service, this is a buy-once grinder.
📅 Update log
- May 10, 202613 month durability check, burrs still aligned, retention still under 0.2 g.
- Jan 19, 2026Added micro-click resolution measurement vs stepless electric grinders.
- Apr 9, 2025Initial review published.
Jamie Rodriguez
Jamie Rodriguez writes for The Tested Hub.
