Gear Dossier · Grinders · No 04 of 8

1ZpressoJX-Pro S.

The verdict in one line: 1Zpresso's own manual describes the JX-Pro S as a fixed click adjustment, 40 clicks per rotation moving the burr 0.5mm (12.5 microns per click), not a stepless one, so it fails our espresso guide's stepless preference outright, but its 48mm conical burr and 30 to 35g capacity comfortably cover the weighed doses both our espresso and moka pot guides call for.

48mm stainless steel conical burr
Burr
10 numbers / 40 clicks per rotation, burr moves 0.5mm per rotation (12.5 microns per click)
Grind adjustment
30 to 35g
Grounds capacity
778g
Weight
5/6
recipe checks
Silver manual coffee grinder with wooden handle beside black 1Zpresso retail box
1Zpresso JX-Pro SImage: 1Zpresso

The fit meter

Not a score. A count.

Every requirement below comes straight out of our own brew guides. Each segment is one requirement; hover or focus any segment to see the exact check it stands for. Lit means the published spec meets the recipe. We do not light what we cannot cite.

Espresso guide's required gear list calls for a burr grinder, stepless preferredMoka pot guide's required gear list calls for a burr grinder set medium-fineEspresso guide doses 18 to 19g per shotMoka pot guide doses 15 to 17g per 4-cup potEspresso and moka pot guides call for two distinct textures on the same grinder: fine, close to caster sugar, for espresso, and medium-fine, about the texture of table salt, for moka potEspresso guide's required gear list also calls for a digital scale, 0.1g resolution, meaning dose is set by weight, not by grind time or a built-in dosing feature

5 of 6 checks pass · every unlit segment is stated, not hidden

Every check, shown working

The recipe interrogates the spec.

Requirement, from our guide
Our number
Manufacturer spec
Fit
Espresso guide's required gear list calls for a burr grinder, stepless preferred
Burr grinder, stepless preferred (espresso guide gear list)
1Zpresso's own manual states there are 10 numbers, 40 clicks, in a single rotation, and every rotation moves the burr 0.5mm: a fixed click adjustment, not a stepless one1zpresso.coffee
Moka pot guide's required gear list calls for a burr grinder set medium-fine
Burr grinder set medium-fine (moka pot guide gear list)
4barista's retailer listing confirms the JX-Pro S's 48mm stainless steel conical burr adjusts in 12.5 micron steps across up to 40x4 clicks per rotation, listing the grinder's suited use as pour-over/drip; that fine, wide-range adjustment covers a medium-fine setting even though 4barista does not use that exact term4barista.com
Espresso guide doses 18 to 19g per shot
18 to 19g dose per shot (espresso guide scaler)
1Zpresso's own product page lists grounds capacity as 30~35g, more than the largest single espresso dose1zpresso.coffee
Moka pot guide doses 15 to 17g per 4-cup pot
15 to 17g dose per 4-cup pot (moka pot guide gear/steps)
1Zpresso's own product page lists grounds capacity as 30~35g, more than double the largest single moka pot dose1zpresso.coffee
Espresso and moka pot guides call for two distinct textures on the same grinder: fine, close to caster sugar, for espresso, and medium-fine, about the texture of table salt, for moka pot
Fine for espresso, medium-fine for moka pot: two distinct settings on one grinder
1Zpresso's own manual states there are 10 numbers, 40 clicks, in a single rotation, and every rotation moves the burr 0.5mm, which works out to 12.5 microns per click, resolution fine enough to hold two separate settings without them overlapping1zpresso.coffee
Espresso guide's required gear list also calls for a digital scale, 0.1g resolution, meaning dose is set by weight, not by grind time or a built-in dosing feature
18 to 19g and 15 to 17g weighed doses, set on a separate scale (espresso guide gear list)
1Zpresso's own product page and manual describe the JX-Pro S as a manual, hand-crank grinder, with grounds collecting in a removable 30 to 35g catch cup, no motor, timer, or built-in dose-by-weight feature described1zpresso.coffee

Plain speech

Buy it, or don't.

For you if

  • You want a portable, hand-crank grinder whose 48mm conical burr and fine click resolution (40 clicks per rotation, 12.5 microns each, per 1Zpresso's own manual) can hold both the fine grind our espresso guide calls for and the medium-fine grind our moka pot guide calls for.
  • You dose by weight on your own scale: the JX-Pro S's 30 to 35g catch cup, per 1Zpresso's product page, comfortably clears either guide's largest single dose, 19g for espresso or 17g for moka pot.
  • You're fine calibrating a clicked dial, 40 clicks per rotation, rather than a true stepless grinder.

Not for you if

  • You specifically want a stepless burr grinder: our espresso guide's gear list names stepless preferred, and 1Zpresso's own manual describes a fixed click adjustment instead (40 clicks per rotation, 12.5 microns each).
  • You want an electric, motor-driven grinder: the JX-Pro S is a hand-crank manual grinder, per 1Zpresso's own product listing.
  • You need a grinder with a built-in scale or auto dose-by-weight stop: 1Zpresso's own materials describe only a removable catch cup, no automated dosing feature.

Questions, answered plainly

FAQ.

1Zpresso’s own manual is specific about how the JX-Pro S adjusts: 10 numbers and 40 clicks in a single rotation, the burr moving 0.5mm per rotation, which works out to 12.5 microns per click. That is a fixed click adjustment, not a stepless one, and our espresso guide names “burr grinder, stepless preferred” on its required gear list. On that single point, the JX-Pro S is an honest fail. What the click resolution does buy back is precision: 12.5 microns is fine enough to hold a genuinely separate setting for espresso’s fine, close-to-caster-sugar grind and the moka pot guide’s medium-fine, table-salt texture, without the two settings blurring into one click of each other.

Capacity is not a concern either way. 1Zpresso’s product page lists a 30 to 35g grounds capacity, comfortably ahead of the largest single dose either guide calls for: 19g for an espresso shot, 17g for a 4-cup moka pot load. The JX-Pro S is a hand-crank grinder with no motor, timer, or built-in dosing feature described anywhere in 1Zpresso’s own materials, so every dose still gets weighed on a separate scale, which is exactly how both guides already work.

4barista’s retailer listing, selling the same foldable-handle S variant, corroborates the 48mm stainless steel conical burr and confirms nothing in the manufacturer’s own numbers is in dispute here. There is no official 1Zpresso chart mapping specific click numbers to espresso or moka pot on this model, so this dossier stops at what 1Zpresso and 4barista actually state rather than borrowing a click range from an unrelated site’s own testing.

FAQ

Is the JX-Pro S a stepless grinder?

No. 1Zpresso’s own manual describes a clicked adjustment: 10 numbers and 40 clicks per rotation, with the burr moving 0.5mm per rotation, or 12.5 microns per click. Our espresso guide’s gear list prefers a stepless grinder, so this is a direct miss on that one point, even though the click resolution itself is fine.

Does the 30 to 35g capacity cover a single espresso dose or a moka pot load?

Yes, both, per 1Zpresso’s own product page. A single espresso shot doses 18 to 19g and a 4-cup moka pot load doses 15 to 17g; either fits well inside the stated 30 to 35g capacity with room left over.

Can one grinder really hit both the fine espresso grind and the medium-fine moka pot grind our guides call for?

The resolution supports it. 1Zpresso’s manual states 40 clicks per rotation with the burr moving 0.5mm per rotation, working out to 12.5 microns per click, fine enough to separate a fine setting from a medium-fine one without the two overlapping on the dial.

What’s in the box?

1Zpresso’s own product page lists the contents as the JX-Pro S grinder itself plus a cleaning brush.

Does the JX-Pro S run on batteries or electricity?

No. It is a manual, hand-crank grinder, per 1Zpresso’s own product listing; there is no motor, battery, or timer described in the manufacturer’s materials.

Sources & data