Rancilio Rocky:
Espresso Grind Settings & Guide
The Rancilio Rocky is an electric flat burr grinder with 50mm burrs. It features stepped adjustment (~40µm per step) and is designed primarily for espresso. With moderate retention (~1.5g) and a hopper-fed design, it's a popular choice from Rancilio.
At a glance
Rancilio Rocky specs
Burr Type
Flat 50mm
Adjustment
Stepped
Step Size
~40µm per step
Retention
Medium (~1.5g)
Single Dose Friendly
No
Espresso Capable
Yes
Primary Use
Espresso
Power
Electric
Espresso starting range
Where to start for espresso
Positions 1–6 for espresso depending on roast
the numbered adjustment collar (lower numbers = finer — e.g. 'try position 3' or 'go one notch finer')
Starting point only — adjust based on your beans, roast level, dose, and target yield.
Quirks & tips
Classic pairing with Rancilio Silvia
Doser version has very high retention — purge 3g before shots
Doserless version has lower retention but still purge 1–2g
Stepped collar with discrete positions — each step is a significant change for espresso
Detailed notes
50mm flat burr, stepped collar. Classic espresso grinder. Doser version: high retention, purge 3g. Doserless: medium retention, purge 1–2g. Durable and long-lived. Each step at espresso fineness is a meaningful grind change.
Dialing in with the Rancilio Rocky? Grindset speaks your grinder's language.
Tell Grindset which grinder you use and it gives you adjustment advice in Rancilio-specific terms — exact steps, not generic "grind finer" advice.
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Manufacturer
Rancilio
Burrs
Flat 50mm
Adjustment
Stepped
Retention
Medium (~1.5g)
Primary Use
Espresso