Mazzer Robur S Automatic Commercial Espresso Grinder

SKU: FROAC1U0E/ACN-QQA
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The Mazzer Robur S Automatic is the doser version of Mazzer's largest espresso grinder, and it earns its place on a busy bar by being simple and hard to break. You flip the switch, the 71mm conical burrs fill the doser, and the automatic cycle takes it from there: grinding restarts every twelve doses and stops on its own when the chamber is full.

Those burrs are the point. At 500 RPM on 60Hz power they turn slowly for their size, which keeps heat out of the grounds and makes light work of the dark, oily roasts that cake and clog in flat burrs. Output runs around five grams per second, so the doser stays ahead of a rush instead of becoming the bottleneck. Adjustment is stepless and micrometrical with a Memory Track collar to index your setting, and the grinding chamber opens for cleaning without losing where you were.

This is the mechanically simpler way into the Robur platform, suited to a shop that wants dosing volume and fewer electronics to think about. If you would rather grind on demand straight into the portafilter, the Robur S Electronic uses the same burr set with electronic dose control.

  • 71mm conical burrs (ref. 186C) turning at 500 RPM on 60Hz power
  • Automatic doser cycle that restarts every 12 doses and stops when the chamber is full
  • 280 g doser capacity
  • Dose adjustment from 5.5 to 8 g, with an 8 to 10.5 g oversize option
  • Stepless micrometrical grind adjustment
  • Memory Track indexed collar so you can return to a grind setting
  • Wider grinding adjustment range for finer control
  • Easy-to-clean grinding chamber that holds its setting
  • Ergonomic dosing lever
  • Doser built to keep ground coffee fresher
  • Aluminum tamper and stainless steel tray included
  • 800 W motor
  • Die-cast aluminum body

  • Dimensions: 28.5"(H) x 9.25"(W) x 11.5"(D)
  • Weight: 62 lbs
  • Hopper Capacity: 3.5 lbs (1.6 kg)
  • Doser Capacity: 280 g
  • Dose Range: 5.5 to 8 g (8 to 10.5 g optional)
  • Burr Type: 71mm Conical (ref. 186C)
  • Burr Material: Steel
  • Burr Speed: 500 RPM at 60Hz
  • Grind Time: 3.4 seconds per 17g dose
  • Grind Adjustment: Stepless Micrometrical
  • Body: Die-cast aluminum
  • Volts: 120
  • Watts: 800
  • Plug Type: NEMA 5-15P
  • Certification: ETL Sanitation (NSF/ANSI 8), ETL Listed
  • Country of Origin: Italy

What makes the Mazzer Robur S Automatic automatic?
The doser refills itself. The Robur S Automatic starts grinding when the doser runs low, stops when it is full, and cycles roughly every 12 doses. The switch itself is still manual, so Automatic describes the doser refill rather than a hands-off grinder.

What size burrs does the Mazzer Robur S Automatic use?
Single phase Robur S Automatic units use 71mm conical steel burrs, Mazzer reference 186C. Mazzer also lists 83mm burrs, reference 187C, but only for three phase machines, which is not what we stock.

How fast do the burrs turn on the Mazzer Robur S Automatic?
500 RPM on 60Hz power, or 420 RPM at 50Hz. The Robur S line runs the largest conical burrs Mazzer fits at the lowest practical speed, which is the combination that keeps heat out of high volume grinding.

How much coffee does the Mazzer Robur S Automatic doser hold?
The doser holds 280 grams of ground coffee, and each pull delivers between 5.5 and 8 grams as standard. Mazzer offers an increased dose option of 8 to 10.5 grams.

How much does the Mazzer Robur S Automatic hopper hold?
The hopper holds 1.6 kg, which is 3.5 lbs.

What are the power requirements for the Mazzer Robur S Automatic?
The Robur S Automatic draws 800 watts at 120 volts with a standard NEMA 5-15P plug. La Marzocco USA specifies 8 amp service for the Robur line, which is more than most grinders and worth checking against your circuit before it arrives.

How big and how heavy is the Mazzer Robur S Automatic?
28.5 inches tall by 9.25 wide by 11.5 deep, and 62 lbs. This is a substantial machine and it wants a dedicated spot on the bar.

Does the Mazzer Robur S Automatic have cooling fans?
No. Mazzer's data sheet for the Robur S Automatic lists no cooling fan among its features. The Robur S Electronic does have double fan cooling. If active cooling matters to you, that is the model to look at.

What comes with the Mazzer Robur S Automatic?
An aluminium static tamper is included as standard. Mazzer lists three options: the increased 8 to 10.5 gram dose, a spring press with a long fork, and the Easy Tamper for the doser.

Who is the Mazzer Robur S Automatic for?
High volume bars that work from a doser rather than grinding to order, and operations where a barista wants ground coffee waiting rather than a four second pause per shot. If you would rather grind on demand straight into the basket, the Robur S Electronic is the same burr platform without the doser.

Is the Mazzer Robur S Automatic good for dark roasts?
Yes. Large conical burrs at low speed handle dark and oily beans better than flat burrs, which tend to clog and heat up on the same coffee. That is a large part of why the Robur S line exists.

What is the warranty on the Mazzer Robur S Automatic?
Mazzer covers the Robur S Automatic with a 12 month parts warranty.

  • Mazzer Robur S Automatic grinder
  • Bean hopper with lid
  • Ground coffee doser, 280 g capacity
  • Aluminium static tamper

Mazzer covers this grinder with a 12 month parts warranty.

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