Best Flat Burr Grinder: Eight of Ten Here Print a 64mm Burr

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Eight of the ten grinders on this page print the same number in their titles or first bullet: 64mm. That is the diameter of the flat burrs, about 2.52 inches across, and it is the closest thing this category has to a standard. It appears on the GeniCup, on six grinders in the middle of the range, and on a MOKKOM with titanium-coated burrs.

The other two print nothing. The Ollygrin and the AYCHIRO both sell themselves as “Flat Burr Coffee Grinder Electric” in their titles, both sit at the budget end, and neither gives a burr diameter anywhere — not in the title, not in the bullets, not in the spec table. A third budget flat burr listing we considered and left out says nothing either.

That silence is the finding. “Flat burr” describes a geometry: two parallel discs, one fixed and one turning, with the beans cut between them. It does not describe a size, and size is most of what separates a grinder built for espresso from one built for a drip machine. When a listing gives you the shape and withholds the dimension, you are being sold the word, not the part.

The gap in what you get is the other half of it. The cheapest 64mm grinder with 100 settings is the SHARDOR. Against the budget pair, you get, at minimum, a published burr size, 90 or 100 grind settings instead of 14, a timer measured in tenths of a second instead of a 2–12 cup dial, and on six of the eight 64mm machines a stated stainless steel or titanium-coated burr.

Inside the 64mm group the differences are smaller than the pricing suggests. One model number, BD-CG308, appears on three of these listings under two brand names. Six of the eight print exactly 100 settings, and only one explains how that 100 is built. Single-dose hoppers come in the box on four, are sold separately on one, and are not mentioned on two.

So read this roundup in three passes. First, does the listing state a burr diameter? Second, does it state the burr material? Third, does the single-dose and timer setup suit how you actually brew? Settings counts come last, because six of them say the same thing. If you are still deciding between flat and conical burrs at all, our best coffee grinder guide covers the wider field.

Budget to premium below. Every 64mm grinder with 100 settings sits in the upper half of the range; the lowest-priced grinder here that states any burr size is the GeniCup.

Our Quick Picks

At a Glance

Ten Grinders, From a Printed 64mm Burr to No Size at All

Read the first column first: eight state 64mm, two state no diameter. Then check burr settings and whether a single-dose hopper is in the box.

#	Model	Burr as Stated	Settings	Single-Dose	Best Sellers Rank	Standout	Main Drawback	Check Price
1	MOKKOM BD-CG308	64mm stainless	100	Bellows hopper incl.	#34 in Electric Burr Grinders	Best-ranked here: #34 in Electric Burr Grinders	No dimensions or weight published	View on Amazon
2	SHARDOR CG301	64mm, material not stated	100	Sold separately	#56 in Electric Burr Grinders	Largest sample: 4.4 across 418 ratings	Never names the burr material	View on Amazon
3	AMZCHEF FC6202	64mm stainless	90	Not stated	#158 in Electric Burr Grinders	58mm portafilter holder with push-to-grind switch	12.0 lb and 16.27 in tall	View on Amazon
4	Tuni G3	64mm stainless	100	50g hopper incl.	#65 in Electric Burr Grinders	Fullest box: holder, 100g cup, dosing ring, bellow	Timer steps are 0.5 s, not 0.1 s	View on Amazon
5	DAOFEL 64mm	64mm stainless	100	Bellows hopper incl.	#187 in Electric Burr Grinders	4.8 stars, the highest rating here	Only 29 ratings; model field reads BD-CG308	View on Amazon
6	MOKKOM Titanium	64mm titanium-coated	100	Bellows hopper incl.	#34 in Electric Burr Grinders	The only coated burr on the page	Same model number, pricier	View on Amazon
7	MiiCoffee GF64	64mm stainless	20 x 5 = 100	Not stated	#176 in Electric Burr Grinders	Only listing to explain its 100 settings	4.0 across just 22 ratings	View on Amazon
8	GeniCup CG-3406	64mm alloy, 50HRC	35	Straight-through	#124 in Electric Burr Grinders	Cheapest stated 64mm burr here	3.6 stars from only 7 ratings	View on Amazon
9	Ollygrin BG710	Not stated	14	Not stated	#67 in Electric Burr Grinders	4.4 across 77 ratings, budget end	No burr diameter; dimensions conflict	View on Amazon
10	AYCHIRO BG705S	Not stated	14	Not stated	#59 in Electric Burr Grinders	Burr removes for cleaning	Neither burr size nor burr material stated	View on Amazon

Ratings and specifications are taken from each manufacturer’s Amazon listing as displayed on 5 October 2026 through a United States connection, and may change. Burr descriptions are reproduced as each listing gives them. The SHARDOR states “64mm Flat Burr” and an “All-metal Grinding Chamber” but never names the burr material. The GeniCup states “64mm flat burn alloy burrs” with hardness “above 50HRC”. The MOKKOM Titanium describes its burrs as “titanium-coated”, not solid titanium. Neither budget grinder states a burr diameter; the Ollygrin’s title says “Stainless Steel Burr Grinder” and the AYCHIRO names no burr material. The two MOKKOM listings share one sales rank (#95,737 overall, #34 in Electric Burr Grinders), which suggests a pooled parent listing; their ratings are reported separately. The DAOFEL’s own model field reads BD-CG308, the same model number as both MOKKOMs. The MiiCoffee’s 100 settings are 20 macro steps with 5 micro steps each. Listings were captured on 5 October 2026.

Scroll the table sideways to see every column

How We Chose These Ten

We researched current listings, compared manufacturer specifications and documentation, and examined recurring patterns in customer feedback. We did not carry out hands-on testing, and nothing below is presented as measured performance data.

• Burr diameter recorded exactly as printed — eight listings state 64mm; two state no size at all, and that absence is reported rather than estimated
• Burr material taken from the bullets, not assumed — five state stainless steel, one titanium-coated, one “alloy” at 50HRC, and three name no burr material
• Settings counted as published, with the method where one is given — 100 on six, 90 on one, 35 on one, 14 on two; only the MiiCoffee says how its count is built
• Single-dose design noted only where the box includes it — four include a single-dose hopper, one sells it separately, and the rest either describe a different approach or say nothing
• Model numbers compared across brands — three listings carry BD-CG308, and we kept two of them at the MOKKOM brand cap so you can see what the third brand charges
• A verified live buy box — all ten confirmed in stock on amazon.com through Amazon’s official API on 5 October 2026, with ratings and review counts from a US search the same day
• The budget end kept on purpose — two budget grinders that use the words “flat burr” are included so the gap between the label and the spec is visible; a third, near-identical one was left out

The Ten Flat Burr Grinders in Detail

Eight Listings Print 64mm. Two Print Nothing.

Here is every burr description on this page as published, with the price and the setting count beside it. Read the first column as what you can verify before you buy.

The line falls exactly at the budget break. Every grinder from the GeniCup upward states 64mm. Every budget grinder states no diameter. There is no listing in between that names a smaller size, so the page offers no way to say what the budget burrs measure. What it does show is that a maker with 64mm burrs puts the figure in the title, because it is the selling point. A maker that leaves it out has chosen to.

Why the size matters: on a flat burr grinder, diameter sets how much cutting surface the beans pass over, and 64mm is common enough that it has become a reference point for home espresso grinders and an aftermarket burr size, which is why the MiiCoffee can offer an SSP upgrade at all. A listing that says “flat burr” without a diameter has told you the shape of the parts and nothing about their scale.

The gap in specs follows the line. The budget pair has 14 settings against the SHARDOR’s 100 and the titanium MOKKOM’s 100. In between sits the GeniCup alone, the only listing that offers a stated 64mm burr below the mid-range tier, with 35 settings and 3.6 stars across 7 ratings to show for the saving.

One Model Number, Three Listings

Three of these listings give their model as BD-CG308. Two are MOKKOM; the third is sold as DAOFEL. Put their stated specs side by side.

Same model number, same hopper capacity to two decimal places, same bellows, same setting count. The listings do not say they are the same machine, and a model field can be filled in carelessly, but on the published evidence the stainless MOKKOM is the cheapest way to buy this layout, the DAOFEL costs more for a different badge and a gunmetal finish, and the titanium MOKKOM costs the most for the burr coating.

That coating is the only clean experiment on the page. Two listings from one brand, one model number, one variable changed: stainless burrs against titanium-coated burrs. The market’s answer so far is mixed. Both score 4.5, the stainless version on 326 ratings and the coated one on 77, and they share a sales rank, so there is no separate signal for which sells better.

The DAOFEL is useful even if you never buy it. It publishes what the MOKKOMs do not: a weight of 7.9 pounds and a height of 16.0 inches. If the three are built the same, those are the numbers to measure your counter against.

100 Settings Is a Count, Not a Step Size

Six of the ten print exactly 100 settings. That uniformity is suspicious in the same way the 64mm is reassuring: it is a round number chosen for the title. None of the ten states how far the burrs move per step, which is the figure that would let you compare them.

Settings per grinder make one point plainly: the budget grinders offer far fewer steps. The budget pair gives you 14 settings; the 64mm grinders give you 100. That is 7 times the settings on the page, a measure of control rather than a measure of quality.

Only two listings describe the mechanism behind the number. The AMZCHEF’s 90 steps each have a tactile click, which makes them countable and repeatable. The MiiCoffee’s 100 are 20 coarse positions with 5 fine positions each, which tells you how to move between brew methods and how to fine-tune within one. The MOKKOM names the part, a 7mm brass ring, but not the step. The rest print a number. For espresso, where a small change in grind moves a shot by seconds, the step size matters far more than the count, and nobody here publishes it.

The two 14-setting grinders are a different case. With 14 positions to cover espresso through cold brew, each step has to be large, and that is what a 2–12 cup drip grinder needs: a handful of clear positions for a handful of brew methods. It is not a fault for a pot of filter coffee. It is a fault if a listing implies the same job as a 100-setting 64mm grinder by sharing the words “flat burr”.

Burr Material and Single-Dose Design

Two more specs separate the 64mm grinders from each other more than settings do: what the burrs are made of, and whether the grinder is set up to weigh in one dose at a time.

Five listings say stainless steel, one says titanium-coated, one says alloy with a hardness figure, and three name no burr material. One of those three is the SHARDOR, the most-reviewed grinder here, which is a reminder that a large rating sample and a complete spec sheet are not the same thing.

Single-dosing is the workflow most home espresso drinkers end up using: weigh the beans for one shot, grind them all, clear the chamber. Four of these include the hardware to do it; the SHARDOR sells it as an extra; the GeniCup builds it into the body. If you weigh every dose, a scale matters as much as the grinder — our best kitchen scale guide compares the options — and a 0.1-second timer becomes a convenience rather than the main control.

Best Alternatives

If none of the ten fits, these are the directions worth considering, with what each gives up.

What Each Step Up Actually Buys

The budget tier: the word “flat burr”. Two grinders, 14 settings each, a 2–12 cup selector, no timer, no stated burr diameter. You get burrs instead of a blade, which is a genuine improvement for drip and French press, and a cleaning routine that lifts the burr out. You do not get espresso, and you do not get a size you can compare.

The lower mid-range: a stated 64mm burr on a thin record. One grinder, the GeniCup, with 35 settings, a brushless motor, a straight-through single-dose design and 3.6 stars across 7 ratings. It is the only way to buy a published 64mm burr below the main 64mm tier, and the only listing that gives a burr hardness.

The main tier: the 64mm standard with 90 or 100 settings. Six grinders. Here the step up buys timers in tenths or halves of a second, anti-static systems, portafilter holders and, on three of them, a single-dose hopper in the box. The differences inside this tier are the box contents and the review sample, not the burr.

The top tier: a coating. One grinder, the titanium MOKKOM, the same listed model as the stainless MOKKOM with titanium-coated burrs. The step up buys wear resistance, as the listing claims, and nothing else that the listings show.

What to Check Before You Buy

A burr diameter in writing

If a listing says “flat burr”, look for the millimetres. All eight 64mm grinders here print 64mm. Both budget grinders print nothing. A missing number is not proof the burrs are small, but it means you are buying without the one spec that defines the category.

The burr material, not the body material

“Stainless steel design” usually describes the housing. Look for the word next to “burr”. Five listings here name stainless steel burrs, one names a titanium coating, one gives an alloy and a 50HRC hardness, and three name nothing.

How the settings are built

A count of 100 is a marketing number until the listing says how the steps work. Clicks, as on the AMZCHEF, or a macro-and-micro scheme, as on the MiiCoffee, are what make a setting repeatable. No listing here gives the step size, so ask the seller if espresso is the plan.

Whether single-dosing is included

Four of the ten include a single-dose hopper; one sells it separately; one is designed around single-dosing. If you weigh each dose, count the hopper in before comparing. The SHARDOR’s lower price can disappear on the accessory.

Your portafilter size

The AMZCHEF holder is 58mm only. The Tuni holder takes 51–58mm. The MiiCoffee includes a 58mm cup to grind into. If your machine uses a smaller basket, the holder you pay for may not hold anything.

Height under your cabinets

The published heights run from 9.25 inches on the AYCHIRO to 16.27 on the AMZCHEF. Two of the 64mm grinders, both MOKKOMs, publish no height at all; the DAOFEL, with the same model number, gives 16.0 inches. Measure the gap before you order.

The rating and its sample

The highest score here, 4.8, sits on 29 ratings. The largest sample, 418, sits on a 4.4. A rating from 7 or 16 people can swing on a single review. Weigh the count before the stars.

Common Mistakes

• Trusting “flat burr” without a size. Both budget grinders here say it; neither states a diameter.
• Comparing setting counts. Six print 100; none publishes the step size that makes 100 meaningful.
• Paying twice for one model. BD-CG308 appears on three listings at three different prices.
• Reading “titanium” as solid titanium. The MOKKOM Titanium’s bullet says titanium-coated.
• Forgetting the single-dose hopper. The SHARDOR sells it separately; four rivals include one.
• Buying a 58mm holder for a 54mm machine. The AMZCHEF holder is 58mm only; the Tuni’s takes 51–58mm.
• Ranking by stars alone. The 4.8 DAOFEL has 29 ratings; the 4.4 SHARDOR has 418.
• Ignoring height. The AMZCHEF stands 16.27 inches; two MOKKOMs publish no height at all.

Who Should Buy Which

Buy the MOKKOM BD-CG308 if you want one grinder for everything. 64mm stainless burrs, 100 settings, a 7mm brass adjustment ring, a single-dose bellows hopper in the box and 4.5 across 326 ratings.

Buy the SHARDOR CG301 if sample size comes first. The cheapest 100-setting 64mm grinder and 4.4 across 418 ratings, as long as you accept an unnamed burr material and buy the single-dose hopper separately.

Buy the AMZCHEF FC6202 if you pull shots on a 58mm portafilter. Push-to-grind holder, 90 clicked settings, stainless burrs and a three-part anti-static system.

Buy the Tuni G3 if your portafilter is 51mm or 54mm. The only holder here that takes 51–58mm, plus a single-dose hopper, dosing cup, dosing ring and a stated warranty.

Buy the DAOFEL if you want the BD-CG308 layout with published dimensions. 4.8 stars on 29 ratings, 7.9 pounds and 16.0 inches tall.

Buy the MOKKOM Titanium if burr wear is your worry. The only titanium-coated burrs here, on the same listed model as the stainless MOKKOM, at a higher price.

Buy the MiiCoffee GF64 if you plan to upgrade burrs. The only listing that names an SSP upgrade path, in the most compact 64mm body with published dimensions.

Buy the GeniCup CG-3406 if you want a 64mm burr on a lower budget. 35 settings, a straight-through single-dose design and a stated 50HRC hardness, on 3.6 stars from 7 ratings.

Buy the Ollygrin BG710 if you brew drip by the pot. 14 settings, a 2–12 cup selector and 4.4 across 77 ratings; no stated burr size.

Buy the AYCHIRO BG705S if it is the one in stock on the day. The same budget layout with a removable burr, on 4.6 across 16 ratings.

Frequently Asked Questions

Final Verdict

Every 64mm grinder on this page prints its burr size, and it is the same size: 64mm. Both budget grinders print the words “flat burr” and no size at all. That is the clearest line in the category, and it falls exactly at the budget break. A listing that names the geometry and withholds the dimension is selling you the label.

Inside the 64mm group, the burr stops being the difference. Seven of the eight sit in the upper tiers, six print 100 settings, and three share the model number BD-CG308. What separates them is the box: a single-dose hopper included or sold separately, a portafilter holder that fits 58mm or 51–58mm, a timer in tenths or halves of a second, and a burr material that five name as stainless steel, one coats in titanium, one calls alloy and one leaves out.

Read the rating with its sample. The highest score, 4.8, is on 29 ratings. The largest sample, 418, is on a 4.4. The cheapest 64mm grinder has 7 ratings. The best-ranked grinder shares its rank with a sibling. None of that is a reason to avoid any of them; all of it is a reason to look past the stars.

If you buy one grinder from this page, make it the MOKKOM BD-CG308. It states its burr size, its burr material and its adjustment ring, includes the single-dose hopper the SHARDOR charges extra for, and carries the best category rank here with 4.5 stars across 326 ratings. If you only ever brew a pot of drip, the budget Ollygrin will do that job, but buy it knowing it has never told you how big its burrs are.