The 1ZPresso Q2 Heptagonal is a compact, lightweight, and portable hand grinder
featuring a 38mm heptagonal (7-spoke) burr set, a foldable handle,
and a tool-free disassembly design for easy cleaning.
It's budget friendly : $109 USD
Country of origin: Taiwan.
It's known for producing a clean cup with fruity notes, especially in pour-over and Aeropress,
offering a great balance of performance and portability for travelers and home users.
Heptagonal Burrs:
Unlike the previous pentagonal burr models, the Q2 Heptagonal uses a 7-spoke stainless steel 38mm burr set.
(it's a very similar design to the Comandante C40, although the C40 uses a different high nitrogen alloy which would effect the grind differently to stainless S.)
I got this on a certain Chinese site.
This design in any case, gives the Q2 a very fast grind time with less physical effort to turn the handle and also great clarity .
Weight:475g
Dimensions: 145mm high, 47mm diameter
It uses dual bearings and a triaxial design to ensure a stable and consistent grind, even at fine settings.
The crank handle folds down for compact storage and easy portability.
Stepped Adjustment:
30-click adjustment per rotation with each click representing a precise 24µ change in grind size.
The grinder can be completely taken apart by hand for thorough and convenient cleaning.
I use the 13 setting for my Aeropress.
It will fit 20g of beans inside the hopper.
Immersion (French press, Cold brew) 70+
Drip & Pour Over 50-70
AeroPress 40-50
Moka Pot 30-40
Espresso 5-30
The grind setting is internal.
Made from a combination of 420 stainless steel and aluminum alloy, it is durable and built to last.
The heptagonal burr is praised for producing a clean and refreshing pour-over, highlighting the fruity notes of the coffee beans.
It is suitable for a wide range of brew methods, including pour-over, Aeropress, French press, and can even be used for manual espresso (though this isn't my first espresso grinder choice).
It fits inside the Aeropress , and is my travel grinder of choice.
Effortless Grinding:
The burr geometry and dual-bearing system contribute to a smooth and effortless grinding experience.
Considerations
Grind Capacity:
The Q2 has a smaller capacity, around 15-20g, which is ideal for single-serve brewing rather than large batches.
Burr Difference:
If you're looking at an older Q2 model, it might have a pentagonal burr set, which is different from the heptagonal one here.
These were designed specifically for filter-focused grinding.... pour-over, drip, or any other non-espresso brewing method.
This reminds me of the Timemore C2
The 7 sided international blade
heptagonal burr on the q2
These are very similar to what you will find in the 1zpresso K-series.
It's 39mm and nitro coated.
The standard Comandante C40 has approximately 30 microns of burr adjustment per click. (the Q2 has 28microns/click). This means that each click changes the burr's position, and thus the grind size, by about 30 microns.
This provides a good level of control for most filter coffee methods like pour-overs and Aeropress.
For Espresso:
The 30-micron increment can be too coarse for dialing in espresso.
I general, the lower the the microns per click, the better your grinder will be for espresso.
By increasing the threads on the adjustment axle, we can increase the number of available adjustment settings.
Thus making it easier to achieve the very precise grind sizes needed for espresso.
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There are new Q and Q air grinders that feature new shorter heptagonal burrs than the Q2
These upgraded burrs have more teeth on the collar
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Hexa vs penta burrs in a nutshell.
Hexagonal and pentagonal burrs differ in shape, with hexagonal burrs typically having six sides, while pentagonal burrs have a five-sided shape and are often used in coffee grinders for their ability to produce finer grinds with more fines, making them suitable for espresso.
The choice depends on the application: hexagonal for medium roast beans , and pentagonal for specialized coffee grinding that produces smaller particles.
This characteristic makes them well-suited for espresso.
Characteristics: Pentagonal burrs, often compared to heptagonal burrs (seven-sided), require more rotations to grind but often require less force. They are sometimes preferred for darker roasted coffees due to their tendency to produce more fines. which is desirable for espresso, whereas other burr types are geared towards other brew methods.
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