Mahlkönig E64 WS – Home Espresso Grinder with Grind-by-Weight and Grind-by-Sync
You place the portafilter in the fork. The grinder detects the weight, the display shows 0.0g. The motor starts automatically, the 64mm special steel burrs get to work, and the coffee grounds fall into the portafilter. 12.0, 15.0, 17.8, 17.9, 18.0 grams – the grinder stops. Not after six seconds, not by an estimate, but at the exact weight you programmed. Tomorrow, the day after, in three months: the same 18.0 grams. The beans age, humidity fluctuates, the hopper empties – the dose remains constant.
The Mahlkönig E64 WS is Mahlkönig's first home espresso grinder with Grind-by-Weight and the new Grind-by-Sync technology. Unveiled at HostMilano 2025, it builds on the same 64mm grinding mechanism as the professional Mahlkönig SD64, bringing a feature previously reserved for commercial use into the home kitchen: dosing accurate to 0.1 gram, reproducible with every shot. Coffee Coaching Club is a partner of Mahlkönig in Switzerland.
Grind-by-Weight
Most electric espresso grinders grind by time. You set five seconds, and the grinder grinds for five seconds. The amount of coffee grounds produced depends on many variables: how dense the bean is, how moist it is, how full the hopper is, how old the roast is. In practice, this means that an 18-gram target amount can result in 17.4 grams one time, and 18.7 grams another. Anyone extracting by weight ratio (1:2 as a starting point) will get a different extraction dynamic every time – even if the output is correct.
The E64 WS solves this with an integrated scale directly beneath the portafilter fork. The coffee grounds are weighed in real-time as they fall from the burrs. The motor stops as soon as the programmed weight is reached – with a resolution of 0.1 gram. The deviation from shot to shot is in the tenth-of-a-gram range – more precise than most manual weighings with an external scale.
What this means for taste: If you want to understand your extraction, you need a stable variable. The dose is the most fundamental. If it's constant, grind adjustments, bean changes, and temperature variations become clearly discernible. Without a constant dose, every change is a guessing game. This is the true value of Grind-by-Weight for home use.
Grind-by-Sync – when grinder and machine communicate
Grind-by-Sync is an interface that connects the E64 WS with compatible Mahlkönig devices. Specifically: with the Mahlkönig Sync Scale or the Mahlkönig Xenia. In a Sync setup, the Sync Scale measures the actual extraction time or output weight. If the shot is outside your recipe parameters, the system signals the grinder: finer or coarser, automatically, to bring the next shot closer to the recipe.
Important context: Grind-by-Sync is an ecosystem feature. With non-Mahlkönig machines, the E64 WS functions as an excellent Grind-by-Weight grinder, but without automatic grind adjustment. Users of the Sync Scale get full automation. For everyone else, GbW remains the core feature. Functions can be expanded over time through over-the-air software updates.
Electric Grind Adjustment in Micron Steps
The E64 WS has no ring, no knob for grind adjustment. The burr distance is electronically adjusted via a sensor-controlled motor (Disc Distance Detection, DDD) and displayed in microns. A single micron corresponds to approximately one second of extraction time difference – a precision that has been rare in this price range. Zero point calibration is tool-free and guided on the display: you bring the burrs together until they touch, set the zero point, done. After a burr change, the grinder is back to its reference point in a few minutes.
It also features a ball joint spout that flexibly adapts to various portafilters, and a metal Clump Buster (now included as standard). The LED display has adjustable ambient lighting at the spout – the color can be matched to your setup, if desired.
At a Glance
| Grinding type |
64mm Special Steel Flat Burrs (same grinding chamber as Mahlkönig SD64) |
| Burr compatibility |
SSP 64 mm burr sets fit (approx. 0.1 mm thicker than original – recalibrate zero point after changing; according to Mahlkönig, installation of non-original burrs may affect the manufacturer's warranty) |
| Dosing system |
Grind-by-Weight (integrated scale, 0.1 g resolution) |
| Sync function |
Grind-by-Sync (with Mahlkönig Sync Scale or Xenia) |
| Grind adjustment |
Electric in micron steps, Disc Distance Detection (DDD) |
| Motor speed |
~1950 RPM (idle, not variable) |
| Grinding capacity |
2 to 3.5 g/s (depending on grind size) |
| Max. daily output |
2.5 kg (home use, not continuous cafe operation) |
| Hopper capacity |
250 g (single-dose with bellows possible) |
| Connectivity |
Mahlkönig Sync App (iOS/Android), Firmware updates Over-the-Air |
| Display |
LED, customizable ambient lighting at the spout |
| Spout |
Ball joint, adjustable for various portafilters |
| Noise level |
under 65 dB (laboratory value) |
| Scope of delivery |
E64 WS, 250 g hopper, bellows, metal clump buster, anti-popcorn lid, manual |
| Dimensions with hopper (W × H × D) |
15.4 × 39 × 21.8 cm |
| Weight (net) |
5.8 kg |
| Voltage / Power |
220–240 V / 200 W |
| Protection class |
IPX1, Protection Class I |
| Colors |
Matte black, matte white |
| Manufacturing |
Designed by Mahlkönig (Hamburg), manufactured in China |
Who is the E64 WS for?
The E64 WS is suitable for home baristas who want an electronically controlled grinder with reproducible dosing and prioritize convenience over tinkering. If you make one to four shots daily with the same bean, save your recipes, and don't want to bother with an external scale every time, this is exactly what you need. If you also use the Mahlkönig Sync Scale, you get the full Sync ecosystem.
The E64 WS is not for everyone. If you switch between several beans daily and consistently single-dose, you'll find single-dose optimized alternatives in the Varia VS6 (exclusive Swiss importer) or the Weber Workshops EG-1. If you're looking for 80mm precision with a pre-crushing system: Option-O Lagom 01 or Lagom P80. The E64 WS is a hopper-first grinder – retention in hopper mode is around 4 grams, which needs to be purged when changing beans. Its strength lies in dose automation, not variability.
Important to know: The E64 WS is designed as a home grinder. It is built for one to two espressos directly in succession, not for continuous commercial operation. The maximum daily output is 2.5 kg; commercial use is not covered by the warranty.
Order directly online
The Mahlkönig E64 WS can be ordered directly from the webshop. Delivery throughout Switzerland and to Liechtenstein in 2 to 4 working days. Click and Collect in Bern, Gerberngasse 44 and Zurich, Hagenholzstrasse 50b. The E64 WS is in daily use there – Grind-by-Weight and the electronic grind adjustment can be experienced directly in the showroom. Financing possible via Heylight.
For questions about Sync integration, comparison with other 64mm grinders, or suitable machines: office@coffeecoachingclub.ch or by phone during business hours.
What goes well with it
The E64 WS works with any portafilter machine. The full Sync ecosystem unfolds with the Mahlkönig Sync Scale, but it also delivers excellent results with machines like the La Marzocco Linea Mini R, La Marzocco Micra, or a Rocket Espresso – Grind-by-Weight works even without Sync integration.
If you want to change the aroma profile of the E64 WS later: SSP 64 mm burrs (High Uniformity, Multipurpose, Lab Sweet) fit into the grinding chamber – the tool-free zero-point calibration on the display makes changing them straightforward. Mahlkönig points out that installing non-original burrs may affect the manufacturer's warranty.
For consistent weight measurement at the output: Acaia Lunar. Affordable alternative: Normcore Scale (exclusive Swiss importer). For puck prep for espresso: Normcore WDT and Tamper or Weber Workshops Moonraker and Really Nice Tamper. For precise coffee water: Apax Labs mineral concentrates (exclusive Swiss importer). For airtight bean storage: Airscape. Background on burrs, particle distribution, and extraction in our Sensorics World.
Frequently Asked Questions
How accurate is Grind-by-Weight on the E64 WS?
The integrated scale has a resolution of 0.1 gram. The deviation from shot to shot is in the tenth-of-a-gram range – more precise than most manual weighings with an external scale. If you program 18.0 grams, you get 18.0 grams with minimal fluctuations.
Does Grind-by-Sync work with every espresso machine?
No. Grind-by-Sync is a Mahlkönig ecosystem and works with the Mahlkönig Xenia espresso machine or with the Mahlkönig Sync Scale. With other machines, the E64 WS operates as a Grind-by-Weight grinder without automatic grind adjustment – the core feature remains usable in any setup.
How does the electronic grind adjustment work?
The burr distance is adjusted via a sensor-controlled motor (Disc Distance Detection, DDD). The display shows the distance in microns, and changes are made steplessly by pressing a button. A one-micron change corresponds to approximately one second difference in extraction time. Zero-point calibration is tool-free and guided by the display.
Do SSP 64 mm burrs fit into the E64 WS?
Yes. The E64 WS uses the same 64 mm grinding chamber as the Mahlkönig X64 SD, and SSP confirms the compatibility of its 64 mm lineup – High Uniformity, Multipurpose, and Lab Sweet. SSP burrs are about 0.1 mm thicker than the original burrs: after installation, recalibrate the zero point, which is guided tool-free on the E64 WS display. Important to know: Mahlkönig points out that installing non-original burrs may affect the manufacturer's warranty. We carry the SSP 64 mm burrs in our assortment – allowing the grinder's aroma profile to be specifically tuned for sweeter or more even extractions.
Can I use the E64 WS for single dosing?
No. Retention, according to tests, is about 4 grams – which is more than with pure single-dose grinders like the Varia VS6 or the Weber EG-1, but within limits for a hopper-first grinder with an integrated scale. Those who consistently single-dose with frequent bean changes are better served by a dedicated single-dose grinder. The E64 WS is primarily designed for continuous use with one type of bean.
How fast is the E64 WS delivered in Switzerland?
2 to 4 working days throughout Switzerland and to Liechtenstein. Click and Collect in Bern and Zurich. Financing possible via Heylight.
Can I see the E64 WS before buying?
Yes. The E64 WS is in daily use in the showrooms in Bern (Gerberngasse 44) and Zurich Oerlikon (Hagenholzstrasse 50b). Grind-by-Weight, electronic grind adjustment, and Sync behavior cannot be conveyed through photos. You are welcome to bring your own beans.
Where can I buy the Mahlkönig E64 WS in Switzerland?
From Coffee Coaching Club as a Mahlkönig partner. We carry the Mahlkönig range including Sync Scale and accessories. Order via coffeecoachingclub.ch, by phone during business hours, or in the showrooms in Bern and Zurich.
Roastery Tip
We have been using the E64 WS in the showroom since its market launch. What consistently impresses us is the dose consistency over weeks. Once programmed, 18.0 grams really remains 18.0 grams – even if the beans change throughout the bag. Our Cozy Chocolate, with the SD64 burr characteristics, reveals a dense, round chocolate note with a balanced body. Nutty Delight runs reliably, the dose remaining constant throughout the week. For a fruitier profile to discover: Wild Peach – the peach note comes through clearly. This is our recommendation, one of many.
