Quamar M80: An Underrated Commercial Espresso Grinder
The Quamar M80 is a commercial on-demand espresso grinder that flies under the radar compared to big names like Mazzer and Eureka. It uses 83mm flat burrs, which puts it in the same size category as grinders costing significantly more. If you're looking for a workhorse grinder for a small cafe or a serious home setup, the M80 delivers a lot of grinding performance for the money.
I first came across the Quamar M80 when a friend opened a small coffee shop on a tight budget. He needed commercial-grade consistency without the commercial-grade price tag. After watching that M80 churn through 5 to 8 kg of beans a day for over two years without a single issue, I became a believer. Here's my full breakdown.
Who Makes Quamar?
Quamar is an Italian manufacturer based near Venice. They've been making grinders since the 1990s, though they've never had the marketing budget of Mazzer or Eureka. Their grinders are often sold through smaller specialty dealers rather than the major espresso equipment distributors, which is why you might not have heard of them.
The company focuses on a simple lineup of commercial grinders at competitive prices. They don't make home grinders, pour-over equipment, or lifestyle products. It's a grinder company that just makes grinders. There's something refreshing about that focus.
Build Quality and Design
The M80 has a boxy, industrial look. It's not winning any design awards, but it feels built to last. The body is painted aluminum with a solid base that keeps the grinder stable during operation. At about 26 pounds, it's heavy enough to stay put on a cafe counter even during aggressive use.
The 83mm Flat Burrs
The standout spec is the 83mm flat burr set. For context, many mid-range commercial grinders use 64mm burrs (like the Eureka Atom or Anfim SP2), and high-end options like the Mahlkonig E80S use 80mm burrs. The M80's 83mm burrs put it firmly in large-burr territory.
Larger burrs mean a few things:
- Faster grinding: The M80 grinds a double dose (18g) in about 2 to 3 seconds. That speed keeps up with multi-group espresso machines during peak hours.
- Better heat management: Larger burrs distribute heat over more surface area, so they stay cooler during extended use. This means less temperature-related grind drift during a morning rush.
- More consistent particles: With more cutting surface, the beans have more contact with the burr geometry, producing a tighter particle distribution.
Adjustment Mechanism
The M80 uses a stepless worm gear adjustment. You turn a knob on the side of the grinder, and the upper burr moves incrementally closer to or farther from the lower burr. The worm gear provides fine, precise control, and once you set your grind, it stays locked in place. No drifting, no accidental bumps changing your setting.
I've found the adjustment to be smooth and backlash-free. Small turns produce small changes in grind size, which is exactly what you want for dialing in espresso.
Grind Quality for Espresso
The M80 produces an impressively consistent grind for espresso. The particle distribution is tight enough that shots extract evenly without excessive channeling. I've compared shots from the M80 side by side with a Mazzer Major, and the difference in cup quality is minimal. The Mazzer might have a slight edge in absolute uniformity, but you'd need a refractometer to detect it.
Flavor Profile
The large flat burrs produce a cup with good clarity and a clean finish. I'd describe the M80's flavor signature as balanced, neither overly bright and acidic nor heavy and muted. It lets the character of the coffee come through without adding its own fingerprint.
For darker roasts (common in commercial espresso blends), the M80 handles the oilier beans without clogging or clumping. For lighter roasts, the fine adjustment allows you to tighten the grind enough for proper extraction without choking the machine.
Retention
Retention on the M80 is moderate, around 2 to 3 grams. That's typical for a commercial grinder of this size but higher than what you'd want for single dosing at home. For a cafe where you're grinding the same blend all day, this retention level is fine because the old grounds are constantly being flushed out by fresh ones.
If you plan to use the M80 at home and switch between coffees, plan on purging a few grams each time you change beans.
How It Compares to the Competition
Quamar M80 vs. Mazzer Major
The Mazzer Major is one of the M80's closest competitors. Both have large flat burrs (83mm), both are built for commercial volume, and both produce excellent espresso grinds. The Mazzer Major costs $300 to $500 more, depending on the version. For that premium, you get the Mazzer brand name, a slightly quieter motor, and a wider dealer network for parts and service. For grind quality, they're remarkably close.
Quamar M80 vs. Eureka Helios 80
The Eureka Helios 80 has 80mm burrs and Eureka's signature quiet operation. It's a more refined package with better sound insulation and a more modern design. But the M80 grinds faster due to the larger burrs and costs considerably less. If noise is a concern, the Helios is the pick. If speed and value matter more, the M80 wins.
Quamar M80 vs. Compak K10
The Compak K10 is another 83mm option that competes directly with the M80. Build quality is similar, and grind consistency is comparable. The K10 has a slight edge in adjustment precision, but the M80 costs less. Either is a solid choice for a small to mid-volume cafe.
For a broader comparison, check our best coffee grinder roundup and top coffee grinder picks.
Daily Use and Maintenance
Workflow
The M80 uses timed dosing. You set the timer for your desired dose duration, press the button or activate via the portafilter fork, and the grinder stops automatically. It takes a few test runs to dial in the timer, but once set, the doses are repeatable within about 0.5 grams.
The portafilter fork holds standard 58mm portafilters securely. Grounds drop directly into the basket with minimal mess. There's a small amount of spray at the edges, but a quick brush cleans it up.
Cleaning
The upper burr carrier removes without tools. Twist and pull, and the whole assembly comes out for cleaning. I recommend brushing the burrs and chamber daily in a cafe setting and weekly for home use. Coffee oils build up on the burr surfaces and can go rancid, affecting flavor. A monthly deep clean with grinder tablets keeps everything fresh.
Burr Replacement
At 83mm, replacement burrs for the M80 run between $60 and $90 per set. For a cafe grinding 5 to 10 kg daily, expect to replace burrs every 12 to 18 months. Home users won't need to think about burr replacement for many years.
Noise
The M80 is on the louder side for commercial grinders. The large motor and burrs produce a noticeable whir during operation. It's not unpleasant, but it's definitely audible throughout a small cafe. If you're using it at home, early morning grinding will be heard in other rooms.
Who Should Consider the Quamar M80?
The M80 is a strong choice for:
- Small cafe owners who need large-burr performance without the price tag of a Mazzer or Mahlkonig
- Coffee carts and pop-ups that need a grinder fast enough for high-volume service
- Budget-conscious roasters who want a quality grinder for their tasting bar
- Home enthusiasts who want commercial-grade espresso and don't mind the size and noise
It's not the right grinder if you need ultra-low retention for single dosing, if you prioritize quiet operation, or if you need a grinder for brew coffee (the M80 is strictly an espresso grinder).
Frequently Asked Questions
Where can I buy a Quamar M80?
The M80 is available through specialty espresso equipment dealers, both online and in-store. It's less commonly stocked than Mazzer or Eureka models, so you may need to order through a dealer rather than picking one up off the shelf.
Does the M80 come with a doser?
No, the M80 is an on-demand (doserless) grinder. Grounds are dispensed directly into the portafilter via a chute. There's no doser chamber or pull lever.
What's the warranty?
Quamar typically offers a 1-year warranty on commercial grinders. Some dealers extend this to 2 years. Check with your specific retailer for details.
Can I use the M80 for pour-over?
Not really. The M80 is optimized for espresso-range grinding. You can open the burrs enough for a very fine filter grind, but it won't reach the medium or coarse settings needed for pour-over or French press.
Bottom Line
The Quamar M80 is a serious commercial grinder hiding behind a lesser-known brand name. Its 83mm flat burrs, fast grind speed, and solid build quality put it in the same performance category as grinders costing hundreds more. If you can get past the utilitarian design and the lack of brand cachet, the M80 is one of the best values in commercial espresso grinding. Buy it for what it does, not for the logo on the front.