A flat burr grinder can give you the fine, repeatable grind espresso needs, but the right choice also depends on how you dose, how often you switch beans, and how much cleanup you are willing to do. These four options pair 64mm flat burrs with adjustable settings and timed controls. The main differences are their hopper setups, construction details, and day-to-day controls.
Below, you’ll find a quick comparison, a closer look at each grinder, and a practical guide to choosing one for your espresso routine.
Quick Comparison
| Grinder | Burrs and settings | Dosing features | Standout detail |
|---|---|---|---|
| Tuni G3 64mm Flat Burr Grinder | 64mm stainless steel flat burrs; 100 settings with stepless adjustment | Timed single, double, and continuous modes; two hoppers | Includes a portafilter holder compatible with 51–58mm portafilters |
| MOKKOM 64mm Flat Burr Grinder | 64mm stainless steel flat burrs; 100 settings | Timer adjustable in 0.1-second increments; large and single-dose hoppers | Full-metal body with an aluminum alloy grinding chamber base |
| MOKKOM 64mm Single-Dose Grinder | 64mm stainless steel flat burr; 100 settings | 0.1-second timer; large hopper and silicone bellows hopper | Removable upper burr and hopper for cleaning |
| Aromaster 64mm Flat Burr Grinder | 64mm stainless steel flat burrs; 100 settings | 0.1-second timer; large and single-dose hoppers | Portafilter-activated grinding and a removable grounds chute |
Our Picks: Best Flat Burr Grinder For Espresso reviews
Tuni G3: Flexible Grind Adjustment and Two Hopper Sizes
The Tuni G3 is a 64mm flat burr grinder designed to cover espresso and other brewing styles. Its 100 listed settings offer a wide range, while the product description also identifies the adjustment as stepless. That combination gives you room to make small grind changes when dialing in espresso, rather than limiting you to only a few broad steps.
For dosing, the G3 has an LED touchscreen with single-shot, double-shot, and continuous modes. You can adjust grind time in half-second increments. The package also includes two hoppers: a larger 250g hopper for keeping beans ready to grind and a 50g single-dose hopper for weighing beans as you go. A portafilter holder fits stated portafilter sizes from 51mm to 58mm, and a dosing cup and ring are included as well.
The trade-off is that its timer moves in 0.5-second steps, rather than the finer 0.1-second increments listed for the MOKKOM and Aromaster models. Timed grinding can help you repeat a dose, but it is still worth checking the actual dose on a scale when you change beans or grind settings. The G3’s range of included accessories makes it a particularly versatile package, though it may be more equipment than you need if you only want to grind pre-weighed beans.
Pros:
- Stepless adjustment is listed alongside 100 grind settings.
- Includes both a 250g hopper and a smaller 50g single-dose hopper.
- Portafilter holder supports stated sizes from 51mm to 58mm.
- Includes a dosing cup, dosing ring, bellows, and cleaning brushes.
Cons:
- Timer adjustments are in 0.5-second increments, not 0.1-second increments.
- The multiple accessories and modes may feel like extra complexity for a simple setup.
Verdict: Choose the Tuni G3 if you want one grinder for espresso and other brew methods, with flexible hopper options and a portafilter holder included.
MOKKOM 64mm: A Full-Metal Build with Fine Timer Control
This MOKKOM model pairs 64mm stainless steel flat burrs with 100 grind settings, covering fine espresso grinds as well as coarser options for other brew methods. Its stated full-metal body, aluminum alloy grinding chamber base, and 7mm brass adjustment ring give it a more substantial construction than a grinder built mainly around plastic parts.
The LED display lets you set grinding time in 0.1-second increments, with options for single, double, top-up, and continuous grinding. It comes with a 350g hopper for keeping beans on hand and a silicone bellows hopper for single dosing. A plasma generator at the exit chute is designed to reduce static and keep grounds from scattering. The upper burr and hopper are removable for cleaning, and the package includes a grounds press.
The timer offers more adjustment precision than the Tuni’s half-second increments, but a timer is not a direct measure of coffee weight. You may need to recalibrate it as you change beans, grind size, or dose. The large hopper is useful for frequent grinding, while the silicone hopper better suits a routine based on weighing each dose. If you switch between these approaches often, consider which hopper you expect to use most.
Pros:
- 0.1-second timer adjustments support fine control over timed grinding.
- Full-metal body, aluminum alloy base, and brass adjustment ring.
- Includes both a large hopper and a silicone single-dose hopper.
- Removable upper burr and hopper simplify access for cleaning.
Cons:
- The product details do not state that a portafilter holder is included.
- Timed dosing still needs to be checked by weight for repeatable espresso portions.
Verdict: The MOKKOM is a good fit if you value a metal-bodied design, fine timer increments, and the option to switch between hopper and single-dose use.
MOKKOM Single-Dose Model: Flexible Bean Switching and Removable Parts
This MOKKOM grinder is presented as a single-dose option, but its listed setup also includes a 350g hopper for bulk use. It has a 64mm stainless steel flat burr and 100 grind settings, so it is intended to handle espresso along with coarser brewing methods. Its stainless steel body, aluminum alloy base, and 7mm brass adjustment ring are also listed, matching the other MOKKOM model’s core construction details.
The dosing controls include an LED display and a timer adjustable in 0.1-second increments. For a single-dose routine, the silicone bellows hopper is designed to help clear remaining grounds after grinding. The upper burr and hopper are removable, which makes them easier to access during cleaning. These features may be useful if you often change beans, but the product details do not specify a measured retention amount, so the single-dose design should not be taken as a guarantee that no grounds remain inside.
The main question is how this model differs from the other MOKKOM listed here. Their provided feature descriptions overlap substantially: both list 64mm burrs, 100 settings, a large hopper, a bellows-style single-dose hopper, and 0.1-second timing. This model’s title emphasizes single dosing, but the available details do not establish a separate burr set or a different adjustment system. Compare the included package and current listing carefully if you are deciding between the two.
Pros:
- Includes a silicone bellows hopper for single-dose grinding.
- Also has a 350g hopper for keeping a larger supply of beans ready.
- Timer adjusts in 0.1-second increments.
- Removable upper burr and hopper provide access for cleaning.
Cons:
- Its listed features overlap heavily with the other MOKKOM model, making the distinction unclear.
- The product details do not quantify how much coffee remains after grinding.
Verdict: Consider this MOKKOM if you want a grinder marketed around single dosing but still want a large hopper; confirm the package details before choosing it over the similar MOKKOM option.
Aromaster 64mm: Convenient Portafilter-Activated Grinding
The Aromaster has 64mm stainless steel flat burrs and 100 settings, with a stated range from espresso to French press. Its product description also highlights low-noise operation, though no sound level is provided. For espresso preparation, a useful detail is the built-in switch: you can press a portafilter against it to start grinding without reaching for the touchscreen.
The LED touchscreen offers single, double, and manual modes, with grind time adjustable in 0.1-second steps. It includes a 10.58oz large hopper and a separate single-dose hopper. The listing says gently tapping the single-dose hopper can help release remaining grounds when changing beans. A removable burr and grounds chute provide access for cleaning, and the package includes a brush. Aromaster also lists a 12-month repair service.
The portafilter switch is a convenience feature, but the supplied details do not state which portafilter sizes it fits. If compatibility is important, confirm it before buying. The product description also gives less construction detail than the MOKKOM listings, so shoppers focused on body and adjustment-ring materials may prefer those more fully specified models.
Pros:
- Portafilter-activated grinding helps keep the workflow simple.
- 0.1-second timer adjustments and single, double, and manual modes.
- Includes both a large hopper and a single-dose hopper.
- Removable burr and grounds chute support easier cleaning; 12-month repair service is listed.
Cons:
- The provided details do not specify portafilter size compatibility.
- Construction materials are not described in as much detail as on the MOKKOM models.
Verdict: Pick the Aromaster if you want a touchscreen grinder with portafilter-activated grinding and both hopper styles, but verify portafilter fit for your espresso machine.
How to Choose a Flat Burr Grinder for Espresso
Look for Fine, Usable Grind Adjustment
Espresso often needs small grind changes to suit a particular coffee, dose, and machine. A grinder’s number of settings can indicate adjustment range, but it does not tell you how much the grind changes between settings. The Tuni lists 100 settings and stepless adjustment, while the other models list 100 settings without specifying stepless control. Check the adjustment mechanism and make sure it gives you enough control to dial in your espresso.
Choose a Dosing Style That Fits Your Routine
A large hopper keeps beans ready for repeated grinding, which can be convenient if you usually use the same coffee. A single-dose hopper lets you weigh each portion before grinding and can make it easier to switch between beans. The Tuni and both MOKKOM models offer large and smaller or bellows-style hopper options; the Aromaster lists a large hopper and a separate single-dose hopper. Think about whether convenience or frequent bean changes matter more to you.
Treat Timers as a Starting Point
Timed grinding helps you return to a familiar setting, and finer timer steps can make adjustments easier. The MOKKOM and Aromaster list 0.1-second increments, while the Tuni lists half-second increments. Still, grind time does not directly measure the amount of coffee in the portafilter. Beans and grind settings can affect how quickly coffee passes through the grinder, so weighing your dose is the more dependable way to keep it consistent.
Check Portafilter Fit and Workflow
Accessories can make a grinder more convenient, but compatibility matters. The Tuni specifically lists a holder for 51–58mm portafilters. The Aromaster has a portafilter-activated switch, but the provided information does not state compatible sizes. The product details for the two MOKKOM models do not list a portafilter holder. Check the product listing if you want to grind directly into your portafilter.
Consider Cleaning and Static Control
Grounds that cling to a chute or scatter on the counter add cleanup to your routine. The Tuni and both MOKKOM grinders list anti-static features, while the Aromaster also describes anti-static grinding. Removable parts can make it easier to clear built-up coffee: the MOKKOM models list removable upper burrs and hoppers, and the Aromaster lists a removable burr and grounds chute. Follow the manufacturer’s care instructions when cleaning any grinder.
Compare Build Details, Not Just Burr Size
All four options list 64mm flat burrs, but burr size alone does not determine how well a grinder will suit your espresso setup. The MOKKOM descriptions provide specific construction details, including a full-metal body, aluminum alloy base, and brass adjustment ring. The Tuni and Aromaster descriptions focus more on adjustment, dosing, and workflow features. Use the details that matter to your routine rather than treating one specification as a guarantee of better espresso.
Frequently Asked Questions
Are flat burr grinders suitable for espresso?
Yes. Flat burr grinders can be used for espresso when they offer a fine grind range and enough adjustment to suit your coffee and machine. These four models are described as covering espresso, but you will still need to dial in the grind for your setup.
Does a 64mm burr automatically make a grinder better?
No. Burr size is only one part of a grinder’s design. Adjustment control, grind consistency, dosing workflow, cleaning access, and how well the grinder suits your routine also matter.
Is a single-dose hopper better than a large hopper?
Neither is best for everyone. A large hopper is handy when you use the same beans often, while a single-dose hopper suits weighing each portion and switching coffees. Some of the models here include both styles.
Should I rely on the timer to measure my espresso dose?
Use the timer to repeat a starting point, not as a substitute for weighing your coffee. Grind time can vary with beans and settings, so check the dose on a scale if you want consistent results.
Which grinder has the most precise timer increments?
The two MOKKOM models and the Aromaster list 0.1-second increments. The Tuni G3 lists adjustments in 0.5-second increments. Finer timer steps offer more control over timing, but they do not guarantee a specific dose by weight.
Which option lists a portafilter holder?
The Tuni G3 includes a holder stated to fit 51–58mm portafilters. The Aromaster has a portafilter-activated switch, but its supplied details do not state portafilter size compatibility. The MOKKOM product details do not list a holder.
Final Recommendation
The Tuni G3 stands out for its listed stepless adjustment, two hopper sizes, and included portafilter holder. Choose one of the MOKKOM models if a full-metal build and 0.1-second timer adjustments are priorities, while the Aromaster is worth considering for its portafilter-activated grinding. Before buying, compare each grinder’s dosing style, cleaning access, and portafilter compatibility with the way you make espresso.