Gaggia Classic:
Espresso Settings & Dial-In Guide
The Gaggia Classic is a single boiler espresso machine, designed for home use. It features a 58mm portafilter. With no user-adjustable temperature control, grind adjustments are your primary lever for dialing in.
At a glance
Machine specifications
Recommended starting parameters
Starting recipe for Gaggia Classic
Dose
14–18g
Ratio
1:1.8–1:2.5
Time
25–35s
These are starting points — adjust based on your beans, roast level, and taste preferences.
Known limitations
No PID — temperature surfs widely
OPV not easily adjustable on pre-2015 models (factory ~15 bar)
Pressurized baskets stock — upgrade to unpressurized for better control
Aluminum boiler on early models, brass on later
Dial-in tips for the Gaggia Classic
Original Gaggia Classic (pre-2019, before 'Pro' rebrand).
No PID, no easy OPV adjustment on most versions.
Stock baskets are pressurized — recommend upgrading.
Temperature surfing required: flush after ready light, wait, then pull.
OPV runs high (~15 bar) on older models.
Grind is the primary lever.
Common mods: unpressurized basket, OPV spring swap, PID.
Dialing in on the Gaggia Classic?
Grindset gives you machine-specific coaching — log your shots and get tailored adjustments for the Classic.
Try Grindset freeGaggia Classic
Manufacturer
Gaggia
Type
Single Boiler
Use Case
Home
Confidence
High