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Espresso grind size

Espresso grind size on a Timemore Chestnut C2

For Espresso on a Timemore Chestnut C2, start at 8 clicks. That is about 250 µm, an extra fine grind.

Timemore Chestnut C2 setting for Espresso8 clicksExtra fine grind, ~250 µm
Finer 7 clicksCoarser 9 clicksStep size 33.8 µm

Adjusting from 8 clicks

WhenSettingParticle size
Finer: sour or thin cups7 clicks~206 µm
Start here8 clicks~250 µm
Coarser: bitter or dry cups9 clicks~266 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 Timemore Chestnut C2

Espresso on other grinders

Questions

What grind setting is best for Espresso on a Timemore Chestnut C2?

Start at 8 clicks 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 Timemore Chestnut C2 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.