1Zpresso
1Zpresso J-Max
Excellent
Our score: 81 / 100
Read our full 1Zpresso J-Max review →
What we like
- Enormous click range covers everything from espresso-fine to French-press-coarse on one grinder
- External adjustment dial lets you change grind size mid-crank without opening the unit
- Essentially zero retention, since the whole design is built around a single dose
What we don't
- Hand-cranking a fine espresso dose takes real time and a bit of forearm effort
- Metal body adds weight versus some plastic-bodied hand grinders, which cuts both ways for travel
- That many click positions is a blessing and a curse — dialing in takes patience at first
Specifications
| Burr type | Conical |
|---|---|
| Burr size | 48 mm |
| Burr material | Stainless steel |
| Grind settings | External numbered dial, hundreds of micro-click positions across multiple rotations |
| Adjustment | External stepped dial, adjustable mid-grind |
| Single-dose | Yes |
| Hopper capacity | ~35 g bean chamber |
| Retention | <0.1 g |
| Motor | None (hand crank) |
| Warranty | 2 yr, varies by retailer |
How it compares
1Zpresso J-Max vs. similar coffee-grinders.
| Specification |  | Eureka Mignon Specialita | Comandante C40 | DF64 |
|---|---|---|---|---|
| Our score | 81Best | 81Best | 80 | 75 |
| Burr type | Conical | Flat | Conical | Flat |
| Burr size | 48 mm | 55 mm | ~39 mm (proprietary Comandante burr set) | 64 mm |
| Burr material | Stainless steel | Steel | Hardened steel (Nitro Blade upgrade burrs available) | Steel (stock 'DF' burr; commonly upgraded to SSP or Turin sets) |
| Grind settings | External numbered dial, hundreds of micro-click positions across multiple rotations | Stepless | Stepped, individually calibrated click wheel | Stepless — no numbered indicator on base models |
| Adjustment | External stepped dial, adjustable mid-grind | Stepless collar with digital-timer dosing | Stepped, external Red Clix wheel | Stepless external collar |
| Single-dose | Yes | No — hopper-fed; single-dose conversion possible with aftermarket funnel | Yes | Yes |
| Hopper capacity | ~35 g bean chamber | 10.5 oz (300 g) | ~40 g bean chamber | N/A — single-dose funnel/bellows, ~18-20 g per load |
| Retention | <0.1 g | ~1-3 g depending on grind setting | <0.2 g | <0.5 g with bellows agitation |
| Motor | None (hand crank) | 220 W, ~1,400 RPM, with anti-clumping vibration (ACE) | None (hand crank) | 250 W AC motor, ~1,400 RPM |
| Warranty | 2 yr, varies by retailer | 2 yr | Unknown — varies by region and retailer | 1 yr, varies by importer/seller |