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Espresso grind size

Espresso grind size on a Kinu M47 Classic

For Espresso on a Kinu M47 Classic, start at 1.5. That is about 250 µm, an extra fine grind.

Kinu M47 Classic setting for Espresso1.5Extra fine grind, ~250 µm
Finer 1.3Coarser 1.7Step size 16.5 µm

Adjusting from 1.5

WhenSettingParticle size
Finer: sour or thin cups1.3~217 µm
Start here1.5~250 µm
Coarser: bitter or dry cups1.7~277 µm

Lower numbers are finer. To grind finer, turn the setting down. Change one step at a time, and brew again before changing anything else.

Starting recipe for Espresso

Steps

  1. Weigh 18 g of coffee and grind it.
  2. Distribute and tamp level, then lock in the portafilter.
  3. Start the shot and the timer together, with the cup on a scale.
  4. Stop at about 36 g in the cup, around 25 to 30 seconds.
  5. Taste. Sour or thin: grind finer. Bitter or dry: grind coarser.

Other brew methods on a Kinu M47 Classic

Espresso on other grinders

Questions

What grind setting is best for Espresso on a Kinu M47 Classic?

Start at 1.5 and adjust by taste. Lower numbers are finer. To grind finer, turn the setting down.

How do I know if I should grind finer or coarser?

Shots run fast and taste sour: grind finer, or raise the dose a little. Shots run slow and taste bitter: grind coarser.

Where does this setting come from?

The Kinu M47 Classic is mapped to particle size in microns, fitted from the Honest Coffee Guide's settings for this grinder. It is a starting point, not a guarantee.