Gear Dossier · Grinders · No 07 of 8

ComandanteC40 MK4.

The verdict in one line: Prima Coffee and Voltage Coffee Supply's spec listings put the C40 MK4's conical steel burr at a stated range of espresso to cold brew, wide enough to clear the medium grind our pour-over guide calls for and the medium-fine grind our AeroPress guide calls for, with bean jar capacity well past either guide's per-brew dose.

39mm outer / 30mm inner conical steel burr, high-alloyed high-nitrogen stainless steel
Burr
40 grams of coffee (each of two included jars)
Bean jar capacity
1.63 lbs.
Weight
From espresso to cold brew
Stated grind range
6/6
recipe checks
Black Comandante manual coffee grinder with steel crank handle and clear glass grounds container.
Comandante C40 MK4Image: Comandante

The fit meter

Not a score. A count.

Every requirement below comes straight out of our own brew guides. Each segment is one requirement; hover or focus any segment to see the exact check it stands for. Lit means the published spec meets the recipe. We do not light what we cannot cite.

Pour-over guide's required gear list calls for a burr grinderAeroPress guide's required gear list calls for a burr grinderPour-over guide's scaler doses 15g of coffee to 250g of water, one cupAeroPress guide doses 14 to 18g of coffee per brewPour-over guide specifies a medium grind, "about the texture of granulated sugar"AeroPress guide specifies a medium-fine grind, "close to a 4 on a 1 to 10 grind scale"

6 of 6 checks pass · every unlit segment is stated, not hidden

Every check, shown working

The recipe interrogates the spec.

Requirement, from our guide
Our number
Manufacturer spec
Fit
Pour-over guide's required gear list calls for a burr grinder
"Burr grinder" (pour-over guide, required gear list)
Prima Coffee's spec table lists the C40 MK4's grinding mechanism as "Conical Steel Burrs", material "Patented High-Alloyed High-Nitrogen Stainless Steel", 39mm outer / 30mm inner, a burr set rather than bladesprima-coffee.com
AeroPress guide's required gear list calls for a burr grinder
"Burr grinder" (AeroPress guide, required gear list)
Voltage Coffee Supply's listing states the same burr set: "Conical Steel Burrs", "Patented High-Alloyed High-Nitrogen Stainless Steel", 39mm outer burr / 30mm inner burrvoltagecoffeesupply.com
Pour-over guide's scaler doses 15g of coffee to 250g of water, one cup
15g coffee per cup (pour-over guide scaler: dosePerUnit 15g, waterPerUnit 250g)
Comandante's own product page states each of the two included bean jars holds "40 grams of coffee"comandantegrinder.com
AeroPress guide doses 14 to 18g of coffee per brew
14 to 18g coffee per brew (AeroPress guide: AeroPress's own scoop measure 14-15g heaping, Counter Culture's recipe 18g)
Prima Coffee lists the C40 MK4's bean hopper capacity as "40-45g Capacity"prima-coffee.com
Pour-over guide specifies a medium grind, "about the texture of granulated sugar"
"Medium" grind (pour-over guide dial label)
Voltage Coffee Supply states the grinder covers grinding "from espresso to cold brew", describing it as spanning "a range of brew methods"voltagecoffeesupply.com
AeroPress guide specifies a medium-fine grind, "close to a 4 on a 1 to 10 grind scale"
"Medium-fine" grind (AeroPress guide dial label)
Voltage Coffee Supply states the same grind range: "from espresso to cold brew", "a range of brew methods"voltagecoffeesupply.com

Plain speech

Buy it, or don't.

For you if

  • Brewers who want one grinder to cover both the pour-over guide's medium setting and the AeroPress guide's medium-fine setting: Voltage Coffee Supply lists the C40 MK4's range as running "from espresso to cold brew."
  • No-outlet brewing: it is a hand-crank grinder built around a 39mm outer / 30mm inner conical steel burr (Prima Coffee spec table), no motor required.
  • Single-cup pour-over: each 40g bean jar (Comandante's own listing) holds well more than double the pour-over guide's 15g per-cup dose.

Not for you if

  • Back-to-back big batches: Prima Coffee's listed 40-45g hopper capacity means a refill once you are past a couple of cups of pour-over or several AeroPress doses in a row.
  • Anyone who wants a published click count or micron-per-click figure before buying: neither Comandante's own product page nor the two retailer listings fetched for this dossier state one, so that detail is not verified here.

Where to buy

Comandante C40 MK4 · Comandante

Fits the grind windows in 2 of our brew guides.

Buy on Amazon→

Transparency: the buttons above are affiliate links; if you buy through them we may earn a commission at no cost to you. As an Amazon Associate we earn from qualifying purchases. Fit notes come from manufacturer specifications read against our brew guides, not hands-on trials.

Questions, answered plainly

FAQ.

Comandante does not publish a full spec sheet on its own product page. What it does state, on the C40 MK4’s manufacturer listing, is bean jar capacity: 40 grams per jar, two jars in the box. The burr diameter, weight, and dimensions come from two retailer spec tables instead, Prima Coffee and Voltage Coffee Supply, which agree on a 39mm outer / 30mm inner conical steel burr cut from high-alloyed, high-nitrogen stainless steel, at 1.63 lbs. and 2.4 in. by 6.3 in.

That burr set matters against our own numbers. Our pour-over guide calls for a medium grind and doses 15g of coffee to 250g of water per cup. Our AeroPress guide calls for a medium-fine grind and 14 to 18g of coffee per brew. Voltage Coffee Supply states the C40 MK4 grinds “from espresso to cold brew,” a range that spans both settings, and the 40 to 45g of bean and grounds capacity the two retailers list clears either guide’s dose with room left over.

It is a hand-crank grinder, not an electric one, so there is no motor, no hopper feed, and no dial readout beyond what a crank-and-burr design offers. Neither Comandante’s own page nor the two retailer listings fetched for this dossier publish a click count or a micron-per-click figure, so that detail is left off this page rather than estimated.

FAQ

Does the Comandante C40 MK4 grind fine enough for AeroPress?

Voltage Coffee Supply states the grinder’s range runs “from espresso to cold brew.” Espresso is finer than the medium-fine setting our AeroPress guide calls for, so medium-fine sits inside that stated range.

Does it cover the medium grind our pour-over guide calls for?

Yes, by the same range claim. Medium sits between the espresso end and the cold brew end of the “from espresso to cold brew” range Voltage Coffee Supply lists for the C40 MK4.

How much coffee does the bean jar hold?

Comandante’s own product page states each of the two included jars, one glass, one polymer, holds 40 grams of coffee. Prima Coffee lists the hopper capacity as 40-45g. Either figure clears the 15g dose our pour-over guide uses per cup and the 14 to 18g dose our AeroPress guide uses per brew.

What comes in the box?

Per Comandante’s own listing: one crank with an oak knob, one polymer bean jar, one glass bean jar with a lid, one wrist band, and one merino wool felt mat.

Is the C40 MK4 an electric or manual grinder?

Manual. It is a hand-crank grinder built around a 39mm outer / 30mm inner conical steel burr, per Prima Coffee’s and Voltage Coffee Supply’s matching spec tables. There is no motor and no power cord.

Sources & data