While Mazzer is more known for their longstanding excellence in espresso grinders, the ZM is proof that they are also quite capable of engineering something unique and innovative. Featuring a new paradigm in grind size adjustment and a handful of new burr sets to help it along, don’t be surprised when you start seeing your favorite cafes put a ZM on their filter coffee bar. In true Mazzer fashion, the ZM is also an extremely well-built piece of machinery that looks and feels solid and reliable. Whether you use it for batch brew, manual brewing, or even espresso, the ZM is a powerful grinder that yields excellent and balanced results in the cup.
The ZM’s signature feature is its electronic grind adjustment system, which measures the actual distance between the burrs in microns. To do this, the ZM uses a stepper motor to control burr distance, and calibrates the zero point between the burrs upon first setup and every time the burrs are serviced or replaced. By utilizing actual burr distance, users can finally relate grind settings to each other with far greater reliability. 200 microns on one ZM is the same as 200 microns on another, so now coffee business with multiple locations can set their grinders to perform almost exactly the same without having to excessively fiddle with grind settings. Further, roasters can also communicate to their clients what grind settings might be best for their coffees.
Internally, the ZM uses 83 mm flat steel burrs, mounted vertically directly over the exit chute – which can be outfitted with a bag clamp spout or a catch cup using a quick-twist fitting that makes swapping a cinch. Thanks to that short grind path, retention is also quite low. Our testing found that residual dust and grounds in the burrs measured less than 1 gram when grinding for filter, and under 5 grams when ground for espresso. The only outlier we found was that the bag clamp spout can hold 10 grams or so if grinding a large batch (70-100 grams or more), but knocking the spout with the clamp freed those grounds up easily. Multiple burr options are available for the ZM: the included 151F model burrs are excellent at grinding for brewed coffee from fine to coarse, and the 151G burrs are meant to further improve grind uniformity for even better flavor clarity. By installing espresso burrs (151B), you can pull exceptional shots of espresso from most any coffee, and the ZM can of course grind fine enough for pressure profiling machines or lower pressure extractions.
A digital control panel on the front of the ZM is accessed using the combination knob and button on the right side of the grinder. Turning the knob will scroll through menu options, and pushing the knob in accesses the selected option. Up to 20 grind settings can be stored in the grinder’s memory, and up to 4 of those can be stored on the quick access buttons on the front of the display. The grinder can also be run in timed mode, using a single set burr distance, so a full hopper may be used to dose out various portions of ground coffee. Included is a small 320 gram hopper, and larger accessory hoppers are available for purchase.
What’s in the box:
- Mazzer ZM grinder
- 320 gram hopper
- Two quick-twist canisters, one quick-twist spout with bag clip
- Steel grinds catch tray
- Grinder brush
- User manual
|Burr material:||Pre-seasoned steel. TiN coated available|
|Burr size:||83 mm|
|Hopper capacity:||320 g|
|Power:||100-120 VAC, 50-60 Hz|