Whether you’ve decked out your café with the latest and greatest espresso machines or are just starting to put together your shopping list of equipment, one of the most important things you’ll need is a commercial grinder. However, even though having a good grinder is a crucial aspect of your shop (in fact, some people would say it is even more important than your espresso machine) it can be hard to figure out exactly which one you should choose. For instance, what type and how big of a grinder do you need? Or what is the difference between all the various burr-set sizes, burr shapes and dosers anyway?
When deciding upon a grinder, the first step is to think about the type of shop you have and then calculate how many drinks you are expecting to serve per day. Based on our caffeinated mathematics for stores here in Seattle, a donut or bagel shop serves about 20-50 drinks, a coffee shop will serve around 200+ drinks and restaurant or a bar can expect to serve 10-50 espresso beverages a day. Of course these numbers can fluctuate depending on how big your store is, where it is located, etc.
Once you have determined how many people you will be serving, you can start thinking about what type of grinder to pair with your espresso machine. If you have a smaller sized bakery or donut shop with a one-group machine like a Rancilio Epoca, you’ll get something like the Mazzer Mini, which is a 58mm burr-set grinder that is perfect for doing 20-50 drinks a day. If you have a slightly higher volume store, such as a small to medium sized coffee shop that makes about 120-200 drinks a day you will need to move to a bigger grinder. Generally, if you are making this number of drinks you will have a two-group espresso machine such as the Rancilio Classe 7 or Nuova Simonelli Appia, so you will want to pair it with a 64-65mm grinder like the Nuova Simonelli Eureka Zenith or the Mazzer Super Jolly.
What is the advantage of having bigger burrs? You won’t have to wait as long to get a shot. With a smaller burr-set like 58mm, it will take you about 8-10 seconds to get a double shot of espresso, while with a 64-65mm burr-set it will take only 6 seconds. Thus, if you have a small volume café, it is ok to go with smaller burrs since you won’t experience as much of a time crunch. However, you cannot use a smaller grinder at shop at that is doing 150 drinks a day, as it will slow you down too much.
Does your shop fall somewhere in the middle? You can try getting a commercial grinder equipped with a doser. This allows you to make multiple drinks at once by grinding for them and then fill up the portafilter back to back. Another good rule to keep in mind is that 75 drinks a day is the limit for a smaller 58mm burr-set grinder, and 200 drinks a day is maximum for a mid-size 64-65mm burr set grinder. Finally, if you are making more like 300 drinks day rather than 200, you will need to get a large grinder to get your doses out even faster. For these grinders, you will be looking at something like the Mazzer Major, a 83mm burr-set (which is the biggest flat burr grinders get) grinder or even moving to a conical grinder such as the Compak K10.
Still have questions? Check out this video as Brandon and Kaylie describe picking out a commercial grinder in more detail.