If you know for sure you love espresso, but aren't sure on the right machine style for you, take this quiz!
Learn everything you need to know about boiler types before assembling your espresso set-up.
Learn the art of pour over. The end result is balanced, complex, and—if you’re lucky—a meditative state.
Discover the nuances of coffee brewing and get the right brewer for you.
Start your journey into the wonderful world of specialty coffee and espresso with this diverse collection of beans.
Get 10% off coffee with code BEANS10. Coffee packages and samplers excluded. Not eligible on Closeout Derals. Limited time offer.
For proper machine maintenance, we stock genuine parts and premium care products.
Don't know what part you need? Check our support wiki for part diagrams and guides to help troubleshoot issues.
Build the perfect coffee bar and make sure it stays that way with a state of the art water filtration system.
Choosing a quality tamper is often overlooked as an important consideration of brewing good espresso.
Save big on refurbished and rebuilt machines, so you can stock up on coffee beans.
Find new machines or coffee makers that need a home and fresh, delicious coffees that are beginning to approach their best-by dates.
Discover useful specs, troubleshooting guides, and brewing tips from our huge support wiki.
With over 1,000 videos, our channel has everything from espresso machine reviews, tech and maintenance guides, coffee recipes, and more!
August 26, 2016
As you begin to research grinders, to find the one that best fits your needs, you may come across ones that operate at different RPMs. What does this mean to you? Is it just another thing designed to make the research harder for the machine you’re dying to have on your counter, or just make things more complicated? Well, it’s actually something in between.
First, RPM, if you didn’t know, stands for Revolutions Per Minute. Basically, it’s how many times in a minute that the burrs rotate. This can be good and bad, as there are pros and cons of each.
The Low Speed Grinder
Low speed or high RPM grinders are usually lower cost grinders in the $200 or less range. They have lower RPMs for a couple of reasons. Usually they have smaller motors, and use gear reduction to step down to the smaller RPM. They also usually have smaller burrs and most are conical shaped. The lower RPM grinders usually have less heat buildup. With the gear reduction system, there is likely more of a chance of static buildup. And with the smaller burr set, consistency is not usually ideal for espresso machines. Examples of these would be the Baratza Maestro, Virtuoso, and Capresso Infinity.
These machines work well with pressurized baskets, or for brew processes that don’t require consistent grinds, like French press, drip, etc.
The High Speed Grinder
Usually high speed grinders are also high end in price and performance. They usually have flat burr sets, and beefier motors. The flat burrs provide a more consistent grind with more surface area to grind with, and the higher RPMs grind the beans faster and give it less time for heat to be transferred: it’s processed through the grinder before it gets affected by any grind friction.
Also, hi-speed grinders are direct drive, and that means less gears to wear or break, and gives a quieter grind. Examples would be the Rancilio Rocky, Mazzer Mini, and Compak grinders.
Sign Up For Exclusive Deals, Info and More!Subscribe Now