Mahlkönig E64 WS – Home Espresso Grinder with Grind-by-Weight and Grind-by-Sync
You hang 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 after an estimate, but at the weight you programmed. Tomorrow, the day after tomorrow, 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 to the home kitchen that was previously reserved for gastronomy: dosing accurate to 0.1 grams, reproducible with every shot. Coffee Coaching Club is Mahlkönig's partner in Switzerland.
Grind-by-Weight
Most electric espresso grinders grind by time. You set five seconds, 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 turn into 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 each time – even if the output is correct.
The E64 WS solves this with an integrated scale directly under 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 grams. The deviation from shot to shot is in the tenths of a gram range – more precise than most manual weighings with an external scale.
What this means for the taste: To understand your extraction, you need a stable variable. The dose is the most fundamental. If it is constant, grind changes, bean changes, and temperature variations become clearly discernible. Without a constant dose, every change is a guessing game. This is the real value of Grind-by-Weight in 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 the Sync setup, the Sync Scale measures the actual extraction time or the 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 to note: 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 size adjustment. Those who use the Sync Scale get full automation. For everyone else, GbW remains the core feature. Functions can be extended over time through Over-the-Air software updates.
Electric Grind Size Adjustment in Micrometer Steps
The E64 WS has no ring, no knob for grind size. The burr distance is electronically adjusted via a sensor-controlled motor (Disc Distance Detection, DDD) and displayed on the screen in micrometers. A single micrometer corresponds to about one second of extraction time difference – a precision that has rarely been seen 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.
This includes 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) |
| Dosing System |
Grind-by-Weight (integrated scale, 0.1 g resolution) |
| Sync Function |
Grind-by-Sync (with Mahlkönig Sync Scale or Xenia) |
| Grind Size Adjustment |
Electric in micrometer 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 for continuous cafe operation) |
| Hopper Capacity |
250 g (single-dose possible with Bellows) |
| Connectivity |
Mahlkönig Sync App (iOS/Android), Firmware updates Over-the-Air |
| Display |
LED, adjustable 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 |
| Manufacture |
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 comfort 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 automated dosing, not variability.
Important to know: The E64 WS is designed as a home grinder. It is built for one to two espressos directly in a row, not for continuous commercial operation. The maximum daily output is 2.5 kg; commercial use is not covered by the warranty.
Order Online Directly
The Mahlkönig E64 WS can be ordered directly from our webshop. Delivery throughout Switzerland and Liechtenstein in 2 to 4 business days. Click and Collect in Bern, Gerberngasse 44 and Zurich, Hagenholzstrasse 50b. The E64 WS is in daily use there – Grind-by-Weight and electronic grind size adjustment can be experienced directly in the showroom. Financing available 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 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.
For consistent output weight measurement: Acaia Lunar. Affordable alternative: Normcore Scale (exclusive Swiss importer). For puck prep in 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 information on burrs, particle distribution, and extraction in our Sensory World.
Frequently Asked Questions
How accurate is Grind-by-Weight on the E64 WS?
The integrated scale has a resolution of 0.1 grams. The deviation from shot to shot is in the tenths 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 size adjustment – the core feature remains usable in any setup.
How does the electronic grind size adjustment work?
The burr distance is adjusted via a sensor-controlled motor (Disc Distance Detection, DDD). The distance is displayed in micrometers on the screen, and changes are made steplessly at the touch of a button. A one-micrometer change corresponds to approximately a one-second difference in extraction time. Zero-point calibration is tool-free and guided by the display.
Can I use the E64 WS for single dosing?
Yes, with limitations. The Bellows is included in the scope of delivery, and the metal Clump-Buster is now standard. Single-dosing is possible with a 20-gram dose in the hopper followed by Bellows pressure. Retention, according to tests, is approximately 4 grams – which is more than pure single-dose grinders like the Varia VS6 or Weber EG-1, but within the range 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 bean.
How fast is the E64 WS delivered in Switzerland?
2 to 4 business days throughout Switzerland and Liechtenstein. Click and Collect in Bern and Zurich. Financing available 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 size adjustment, and Sync behavior cannot be conveyed through photos. Bringing your own beans is welcome.
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 our showroom since its market launch. What continues to impress us is the dose consistency over weeks. Once programmed, 18.0 grams really remains 18.0 grams – even as the bean changes throughout the bag. Our Cozy Chocolate, with the SD64 grinding mechanism's characteristics, exhibits a dense, round chocolate note with a balanced body. Nutty Delight runs reliably, the dose remaining constant throughout the week. For a more fruity profile to discover: Wild Peach – the peach note comes through clearly. This is our recommendation, one of many.
