Which to buy · Every setting
Eureka Mignon Single Dose vs Rancilio Rocky
Two grinders cross-shopped at the same money. The Mignon Single Dose turns 0–24 rotations; the Rocky is numbered 0–55.
Which to buy
Choose the
Mignon Single Dose if you…
- single-dose — a 45 g hopper on an inclined body built to cut retention
- want stepless micrometric adjustment
- want 65 mm flat burrs
Choose the
Rocky if you…
- grind from a 0.3 kg hopper
- want stepped settings you can return to — up to 50 on the front ring
- grind for drip as well as espresso — Rancilio rates it for both
Shop links are affiliate links: BrewMark earns a commission if you buy through one, at no extra cost to you. The verdicts were written without regard to it.
Neither is sold new. Rancilio no longer lists the Rocky (its page now returns 404) and sells the Stile as its home grinder. Eureka's current Oro range lists the Mignon Single Dose Pro and Single Dose Brew instead of the original Single Dose.
Sources: Eureka — Mignon Single Dose · Eureka — Oro prosumer range · Rancilio Group — Rocky (archived Jan 2022) · Rancilio Group — Rocky SD specifications (archived May 2022) · Rancilio Group — Stile
| Mignon Single Dose | Rocky | |
|---|---|---|
| Brand | Eureka | Rancilio |
| Scale | Rotations | Numbered dial |
| Dial range | 0.0 rotations – 24.0 rotations | 0 – 55 |
| Burrs | Flat | Flat |
| Espresso → filter | 6.5 rotations | 20 numbers |
| Filter → coarse | 7 rotations | 23 numbers |
Converting a setting
If a recipe quotes a setting for one of these grinders, read across for the equivalent on the other. Rows are spaced evenly by grind size, not by dial number — on a conical burr those are not the same thing.
| Mignon Single Dose | Rocky |
|---|---|
| 1.5 | 5 |
| 3 | 9 |
| 4 | 14 |
| 5.5 | 18 |
| 1+1 | 22 |
| 1+2 | 26 |
| 1+3 | 29 |
| 1+4 | 32 |
| 1+5 | 36 |
| 2+0 | 39 |
| 2+1 | 42 |
| 2+2 | 45 |
| 2+3 | 48 |
| Rocky | Mignon Single Dose |
|---|---|
| 5 | 1.5 |
| 9 | 3 |
| 14 | 4 |
| 18 | 5.5 |
| 22 | 1+1 |
| 26 | 1+2 |
| 29 | 1+3 |
| 32 | 1+4 |
| 36 | 1+5 |
| 39 | 2+0 |
| 42 | 2+1 |
| 45 | 2+2 |
| 48 | 2+3 |
Side by side, by brew method
Where each grinder lands for the same brew, worked out from its own dial curve.
| Method | Mignon Single Dose | Rocky |
|---|---|---|
| Espresso | 2.5 | 8 |
| Moka pot | 4 | 13 |
| AeroPress (short steep) | 5.5 | 18 |
| Pour over — V60 / cone | 1+1.5 | 24 |
| Siphon | 1+2 | 26 |
| Pour over — flat bottom | 1+2.5 | 27 |
| Steep and release — Clever / Switch | 1+3 | 28 |
| Drip / batch brew | 1+3 | 29 |
| Cupping | 1+3.5 | 30 |
| Chemex | 1+4 | 32 |
| French press | 1+5.5 | 38 |
| Cold brew | 2+1.5 | 44 |
The shape of each dial
Where the connectors bunch, that grinder’s dial is compressed and single steps count for more. Comparing the two shapes tells you which gives finer control, and where.
Eureka Mignon Single Dose
Rancilio Rocky
Dialing in the Mignon Single Dose
Single-dose hopper and low retention, aimed at people switching coffees often. The stepless adjustment behaves like the rest of the Mignon range — land near the target and move in small increments.
Dialing in the Rocky
A stepped espresso grinder that has been the budget recommendation for a very long time. The 55 steps across 50mm flat burrs are its limitation — for espresso you will sometimes want a setting between two of them and there is not one, and a single step can move a shot by seconds. Twenty of those steps cover espresso through filter, which is more resolution than the fine end usually gets at this price. Two things make it an espresso grinder in practice rather than a general one: changing setting means holding the locking lever while twisting the hopper, and it keeps a couple of grams in the chute, so every switch between espresso and pour over costs you both fiddling and coffee. Most owners pick one end and stay there.