SCG In Portland: Dialing In A Grinder
When pulling espresso there are 4 things that should be on the front of your mind. The beans, the grind, the tamp and the timing. We are going to focus on the grind right now because it can be one of the more difficult things to really nail. Your grind consistency is going to effected by the bean you are using, how fresh that bean is, the humidly in the room, heck, even your mood! So dialing in your grinder so you can pull your shot in the appropriate amount of time is essential!
Let me start out with a word of warning: dialing in a grinder will use up a lot of coffee, especially if your machine is new. So be prepared to grind up to a pound of coffee!
The trick to dialing in a grinder is keeping all your other variables consistent. So your dose, grind distribution and tamp pressure should be exactly the same every time. That way you know that it is just the texture of the grind that is affecting your timing.
Speaking on timing, this is how you will know which direction to adjust your grinder. The goal is to pull a double shot of two ounces in 25-30 seconds. If your shot reaches two ounces in, say, 15 seconds then you know your grind is way too course. A finer grind will slow your extraction time. On the other end, if it takes 35 seconds to reach that two ounce mark, your espresso will be over extracted. Adjusting the grinder to be more course will fix this.
Remember, when adjusting your grinder you should be making small adjustments. Sometimes one step is all it will take! Also be sure to grind at least a double portafilter worth of beans after each adjustment and throw that out. Otherwise you will have grounds from the previous setting muddling up your shot.
Watch the video below for the in depth tutorial on how to dial in a coffee grinder. And while you are at it, subscribe to our YouTube channel!