Comandante MK4: What Changed and Is It Worth the Upgrade?

The Comandante MK4 is the fourth generation of Comandante's flagship hand grinder, the C40. Comandante has been the benchmark name in premium manual coffee grinding since the original C40 launched, and every new revision gets scrutinized by the specialty coffee community. If you're wondering what actually changed in the MK4 versus older versions, whether the MK4 is worth buying new, or if upgrading from an MK3 makes sense, I'll break it all down based on my hands-on testing.

The headline: the MK4 brings a new burr geometry and improved consistency over the MK3. The changes are real but incremental. Let me explain what that means in your cup.

What Changed in the MK4

Comandante doesn't publish detailed spec sheets, which frustrates the engineering-minded coffee community. But through community testing and Comandante's own marketing, here's what we know about the MK4 updates:

New Burr Geometry

The MK4 uses a redesigned high-nitrogen martensitic steel burr set. The cutting geometry has been refined for what Comandante calls improved "flow dynamics." In practical terms, this means:

• Slightly tighter particle distribution compared to MK3 burrs
• Marginally faster grinding (fewer rotations per gram)
• Reduced fines production, particularly at medium and coarse settings

I ground the same beans on an MK3 and MK4 side by side and measured the particle distribution using a sieve set. The MK4 produced about 8 to 12% fewer fines at a medium-coarse setting. That's a measurable improvement, but it's not a dramatic transformation.

Updated Axle System

The central axle (the shaft that holds the inner burr) has been redesigned for better stability. On some MK3 units, the axle could develop slight play over time, causing the inner burr to wobble and reduce grind consistency. The MK4 axle feels tighter and more precise out of the box.

Aesthetic Updates

The MK4 comes in new colorways and finishes. The wooden body options have been expanded, and the overall look is slightly more refined. The glass catch jar remains the same design, which is good because it works well.

What Didn't Change

• The overall body dimensions are the same
• The grinding capacity is the same (about 30 to 40 grams)
• The adjustment system is the same (internal, click-based)
• The weight is nearly identical (about 470 grams)
• The price is still at the premium end of the market

Grind Quality and Performance

The Comandante has always been known as a filter coffee grinder first and an espresso grinder second (especially without the Red Clix upgrade). The MK4 continues this tradition.

Pour Over and Filter

This is where the MK4 shines brightest. At medium settings, the grind is exceptionally uniform. My V60 brews with the MK4 consistently produced clean, sweet, transparent cups with excellent clarity. Fruit-forward light roasts showed off their character beautifully, with distinct acidity and clean finishes.

Compared to electric grinders in the same price range (Eureka Mignon, Fellow Ode Gen 2), the MK4 holds its own in grind quality and adds the benefit of zero heat transfer during grinding. Some people swear this preserves delicate aromatics, and while I think the difference is subtle, my pour overs from the MK4 do tend to have a slightly more expressive nose than from electric grinders.

French Press and Immersion

At coarse settings, the MK4 produces a clean grind with minimal fines. French press cups are noticeably less muddy than what I get from most electric grinders at the same price. The reduction in fines versus the MK3 is most apparent at these coarser settings, where the improved burr geometry has the biggest impact.

Espresso (Without Red Clix)

The standard Comandante adjustment has 30+ clicks, but the steps between clicks are too large for precise espresso dialing. You'll find that one click produces shots that run too fast and the next click chokes the machine. For espresso, you need the Red Clix.

Espresso (With Red Clix)

The Red Clix is a replacement adjustment ring that doubles the number of clicks, giving you roughly 60+ positions. This provides the fine adjustment steps needed for espresso. With the Red Clix installed, the MK4 grinds well enough for espresso on home machines. Shots are balanced with good body, though the conical burr character gives a slightly different flavor than flat burr espresso grinders.

The Red Clix costs about $40 and takes 5 minutes to install. If espresso is part of your routine, budget for it from the start.

MK4 vs. MK3: Should You Upgrade?

This is the question most people are asking, and my honest answer is: probably not.

If your MK3 is working well and producing coffee you enjoy, the MK4 improvements don't justify the cost of buying a whole new grinder. The burr improvement is measurable but subtle. You won't taste a dramatic difference in your daily cup.

However, if your MK3 has developed axle play or burr wear, replacing it with an MK4 makes sense because you're due for a new grinder anyway. And if you're buying your first Comandante, the MK4 is obviously the version to get.

One note: Comandante sells MK4 burr sets separately. If you want the improved burr geometry in your existing MK3 body, you can buy the burrs and swap them in. This is cheaper than buying a complete new grinder and gives you most of the MK4 improvement.

MK4 vs. The Competition

vs. 1Zpresso JX-Pro

The JX-Pro costs roughly half the price of the Comandante MK4. For espresso, the JX-Pro is actually more capable out of the box because it has finer adjustment steps without needing an accessory like the Red Clix. For filter coffee, the MK4 has a slight edge in grind uniformity and cup clarity. The value proposition favors the 1Zpresso heavily.

vs. Kinu M47

The Kinu M47 is an all-metal stepless grinder that excels at espresso. It's built like a piece of precision engineering and has near-zero wobble. For espresso, the Kinu is the better grinder. For filter, the Comandante's click-based adjustment is easier to dial in and reproduce settings. The Kinu is the espresso specialist. The Comandante is the filter coffee specialist.

vs. Timemore Chestnut X

Timemore's premium grinder competes directly with the Comandante at a lower price. The grind quality is comparable, and the Timemore has an external adjustment ring (more convenient than the Comandante's internal system). The Comandante still has a slight edge in burr quality and build feel, but the gap has narrowed with each Timemore generation.

For a broader comparison across all price points, check our Comandante grinder pricing guide for current market rates, and our Comandante price comparison for deals across retailers.

Maintenance and Care

Daily

After grinding, tap the body gently to dislodge retained grounds from the burr chamber. A few taps is enough. The Comandante retains less than 0.5 grams, so this is quick.

Weekly

Remove the inner burr by unscrewing the adjustment dial and pulling the axle straight out. Brush both burr surfaces with a stiff dry brush. Blow through the body to clear fine particles. Reassemble.

Every 3 to 6 Months

Disassemble the entire grinder and wash non-metal parts (glass jar, plastic components) with warm soapy water. Wipe the burrs with a dry cloth. Do not use water on the burrs, as it can cause oxidation. Some owners apply a tiny drop of food-grade mineral oil to the axle bearing, though Comandante doesn't officially recommend this.

Burr Lifespan

Comandante's steel burrs last years under normal home use. Most users report consistent performance for 3 to 5 years of daily grinding before noticing any decline. Replacement burr sets are available directly from Comandante.

Who Should Buy the Comandante MK4

The MK4 makes sense if:

• You primarily brew filter coffee (pour over, French press, Aeropress) and want the best possible hand-ground results
• You appreciate craft-level build quality and are willing to pay a premium for it
• You want a grinder that will last 5+ years with minimal maintenance
• Aesthetics matter to you (the wooden body and glass jar look beautiful on a counter or in a travel kit)

The MK4 does not make sense if:

• Budget is a primary concern (the 1Zpresso JX offers 90% of the quality at 50% of the price)
• Espresso is your main brewing method (the Red Clix adds cost and still doesn't match dedicated espresso grinders)
• You grind more than 30 grams at a time regularly (the capacity is limited for larger batches)

Frequently Asked Questions

Can I upgrade my MK3 to MK4 burrs?

Yes. Comandante sells the MK4 burr set separately. It fits the existing MK3 body and axle system. This is the most cost-effective way to get the MK4 improvement without buying a whole new grinder.

Does the Comandante MK4 come with the Red Clix?

No. The Red Clix is sold separately. The standard MK4 comes with the regular adjustment ring, which works well for filter coffee but lacks the fine steps needed for espresso.

How long does it take to grind with the Comandante MK4?

About 30 to 45 seconds for 15 to 20 grams at a medium setting. The MK4 is slightly faster than the MK3 due to the improved burr geometry, but it's still slower than large-burred manual grinders like the 1Zpresso JX (which has 48mm burrs versus the Comandante's 39mm).

Is the Comandante MK4 good for travel?

It's portable but not pocket-sized. At about 470 grams and 5.5 inches tall (without handle), it fits in a travel bag or suitcase without issue. The glass catch jar is the fragile point. Consider wrapping it in a cloth or using a silicone sleeve for protection. For a more compact travel option, the 1Zpresso Q2 is smaller and lighter.

My Take After Testing

The Comandante MK4 is a refined version of an already excellent grinder. If you're buying new, it's the obvious choice over the MK3. If you're upgrading from an MK3, save your money and buy the MK4 burr set instead of a whole new unit. The Comandante remains the gold standard for hand-ground filter coffee, but the competition from 1Zpresso and Timemore has made the price premium harder to justify on performance alone. You're paying for craftsmanship, heritage, and that satisfying German engineering feel. Whether that's worth it depends entirely on what you value in your morning coffee ritual.