The Commercial Espresso Dial-In Guide
Dial-in is what keeps your espresso tasting right from first service to last. This guide gives your team a practical daily method to set dose, yield, and grind so flavour stays consistent through weather shifts, rush-hour pressure, and new bags on bar.
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We support North Wales wholesale partners with machine setup, grinder calibration, and staff training so dial-in becomes a fast daily routine, not guesswork.
What you'll need:
machine
scales (0.1g)
stopwatch
& basket
(5–30 days
post-roast)
Set your dose
Your dose is the weight of dry coffee in the basket. Start at the basket's rated capacity — typically 18g for an 18g basket, 20g for a 20g basket. Weigh it every time until this becomes instinct. Inconsistent dose makes every other variable meaningless.
18–20g dose · weigh every shotSet your target yield
Yield is the weight of liquid espresso in the cup. For a standard espresso, target a 1:2 ratio — twice the dose weight. 18g in = 36g out. 20g in = 40g out. This ratio produces balanced extraction across most commercial espresso blends.
1:2 ratio · dose × 2Set your target time
A correctly dialled shot at 1:2 should run 25–35 seconds, measured from the moment the pump starts. This window assumes 9 bars of pressure at the puck. If you are outside this window, grind adjustment is your first tool.
25–35 sec · 9 barPull your first shot
Pull a shot at your starting grind setting. Weigh the yield on calibrated scales. Note the time. You now have a baseline to work from. Do not taste yet — the numbers tell you what direction to adjust before flavour matters.
Shot runs fast — under 25 seconds
The grind is too coarse. Water is passing through too quickly, under-extracting the coffee. The shot will taste sour, thin, and sharp. Adjust the grinder finer in small steps — one click or a quarter-turn at a time. Pull again. Do not make large jumps.
Fast = too coarse → grind finerShot runs slow — over 35 seconds
The grind is too fine. Water is struggling to push through, over-extracting. The shot will taste bitter, dry, and harsh. Adjust coarser in small steps — one click or quarter-turn at a time. Pull again. If the shot chokes completely, go coarser by two clicks before retrying.
Slow = too fine → grind coarserWhen the time is right — taste it
Once your shot falls in the 25–35 second window at your target yield, taste it. You are looking for balance: sweetness, acidity, and body in proportion. If it tastes right, you are dialled in. If it is still sour despite correct time, increase your dose slightly. If it is bitter, reduce your dose or check your water temperature.
Record your settings
Write down your dialled settings: dose, yield, time, grind position, and the coffee name and roast date. This is your baseline for this bag. When a new bag arrives — even the same coffee — expect to re-dial. Roast date, ambient temperature, and humidity all shift the grind.
Log: dose · yield · time · grind · roast dateAdjust for drift during service
Grind setting drifts during a busy service as burrs heat up. If shots start running fast during your morning rush, move one click finer. If they slow after a quiet period, move one click coarser. Check your first shot after any break longer than 20 minutes. Small adjustments prevent big problems.
Check first shot after any breakKnow when to re-dial from scratch
Re-dial fully whenever you: change to a new bag of coffee, change to a different coffee entirely, deep-clean and recalibrate the grinder, or notice a persistent flavour shift that small adjustments are not fixing. Do not chase a bad dial with micro-adjustments — sometimes a full reset is faster.
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