Wiedemann Precision Funnel 41 mm – High-End Funnel for True 7g Single Shots

The Wiedemann Precision Funnel 41 mm is not a classic dosing ring or funnel—but a high-precision specialty tool designed for a clearly defined workflow: perfect single shots using 7g precision sieves.

If you’re looking for maximum control, clean dosing, and reproducible results, this precision funnel is a game-changer. If, on the other hand, you’re looking for a classic dosing ring for 58 mm or 54 mm, this product is deliberately not the right choice.


What exactly is the 41 mm Precision Funnel?

The 41 mm precision funnel was developed specifically for the La Marzocco X-Filter (7g single-shot basket). This basket has an inner extraction area of just 41 mm —significantly smaller than classic 58 mm baskets.

The funnel performs two crucial functions:

  • Precise dosing: The ground coffee is guided precisely into the 41 mm extraction area
  • Tamper guidance: The matching 41 mm tamper is guided to be precisely centered

Without this precision funnel, some of the ground coffee ends up outside the relevant area—leading to inconsistent extraction



Why this system is unique

  • Perfect for true 7g single shots (no halved double shot)
  • Maximum precision in distribution & tamping
  • Clean workflow with no coffee loss
  • Ideal for home baristas, R&D, and sensory analysis
  • Compatible with WDT technology (Weiss Distribution Technique)

The result: clean extraction, reproducible results, and significantly less coffee consumption.


Important: Not a traditional dosing ring / funnel

The biggest mistake: Many people confuse the 41 mm precision funnel with a standard funnel or dosing ring.

That is incorrect.

  • ❌ Not a universal funnel for 58 mm filters
  • ❌ Not compatible with 54 mm portafilter
  • ❌ Not a replacement for classic dosing rings

The 41 mm refers to the inner working area —not the portafilter.



The big topic: GBW grinders (Grind-by-Weight)

Many modern grinders such as:

  • Eureka Mignon Libra
  • Mahlkönig E65 GBW
  • Fiorenzato AllGround Sense

work with an integrated scale and dosing fork.

Problem:

  • A precision funnel or funnel protrudes beyond the portafilter
  • The portafilter no longer fits into the holder
  • Hands-Free GBW no longer works

This means:

  • The funnel can only be used when held manually
  • The advantage of the GBW grinder is lost

Conclusion: For GBW grinders, a classic 58 mm dosing ring is the better solution. 


Compatibility – at a glance

Ideally suited

  • 58 mm portafilter (E61 standard)
  • La Marzocco Linea Mini / GS3
  • ECM, Profitec, Rocket
  • Single-dose grinders (Niche Zero, Fellow Opus)
  • Classic grinders without GBW

Limited compatibility

  • GBW grinders (manual use only)
  • Mahlkönig E65 GBW
  • Eureka Libra
  • Fiorenzato Sense

Not compatible

  • 54 mm portafilter (Sage, Breville, Olympia Maximatic)
  • 49 mm systems (La Pavoni)
  • Standard 58 mm portafilter without 7g system

Reason: The funnel would fall into smaller portafilters instead of resting on them. 


Purchase recommendation

The precision funnel only makes sense as part of a system:

  • 7g precision filter (La Marzocco X-Filter / VST / IMS)
  • 41 mm precision tamper
  • 58 mm portafilter

Without this combination, the product does not function effectively.


Who is this product perfect for?

  • Home baristas focused on precision
  • Espresso enthusiasts with a 58 mm setup
  • Single-shot lovers (7g instead of 18g)
  • Coffee comparison & sensory analysis (R&D)
  • Caffeine-conscious users

Who is this not the right choice for?

  • Users of GBW grinders in hands-free mode
  • Owners of 54 mm machines (Sage, Olympia)
  • Customers looking for a simple funnel
  • Standard espresso users without a 7g system

Technical Details

  • Inner diameter: 41.2 mm
  • Height: approx. 13 mm
  • Material: Aluminum / Precision-machined
  • Compatible with: 7g X-Filter systems
  • Installation: mechanical fit (no magnets)

Conclusion

The Wiedemann Precision Funnel 41 mm isn’t an accessory for everyone—it’s a high-end tool designed for maximum precision.

If you’re specifically aiming for single-shot perfection, this is one of the best tools on the market.

However, if you’re looking for a classic funnel or dosing ring, you’re better off choosing a 58 mm or 54 mm model.

Angaben zum Hersteller

Nico Wiedemann, Wiedemann Manufaktur, Eisenbahnstraße 1, 88255 Baienfurt, Germany, www.wiedemann.coffee, mail@wiedemann.coffee

* Bonität vorausgesetzt. Ratenbeispiel für PayPal Ratenzahlung: effektiver Jahreszins 12,49 % p.a., fester Sollzinssatz 11,80 % p.a., Laufzeit 24 Monate. Genaue Konditionen und Gesamtkosten werden im nächsten Schritt von PayPal angezeigt. Angebot gültig nur für Kunden mit Wohnsitz in Deutschland. Weitere Infos zur Bonitätsprüfung.

Frequently Asked Questions

I bought a new coffee grinder from Naturbohne and there are coffee residues in it.

Please note: Some manufacturers test their coffee grinders before shipping, which means that small coffee residues or bean residues can occasionally be found in the grinder. This procedure is used to test functionality and is considered a quality feature. Of course, we only sell new products - unless expressly stated otherwise.

Static charge – coffee grounds spray out from the side

With some coffee grinders, the ground coffee can become statically charged and spray out of the portafilter at the side. This means that not all of the ground coffee gets into the portafilter, which can lead to uneven extraction. Our recommendation: Use a dosing funnel to ensure that all of the ground coffee is precisely fed into the portafilter - for optimal espresso enjoyment.

What is dead space in coffee grinders?

Conventional coffee grinders often leave a so-called dead space in which coffee residues accumulate. These residues can not only affect the freshness, but also lead to old and fresh coffee grounds being mixed, which negatively affects the taste. In contrast, single dose grinders have a well-thought-out design that eliminates the dead space. Each portion is ground individually and precisely so that no residues are left behind - for a consistently pure and full-bodied coffee experience.

Which portafilter fits my espresso machine?

When choosing the right portafilter for your portafilter machine, it is important to know that each manufacturer develops its own brewing group - the most well-known is the Faema E61. However, this does not mean that any portafilter will fit without any problems. An incompatible portafilter can leak, which will have a direct negative impact on the quality of your espresso. We therefore recommend using either the portafilter originally supplied or one that is explicitly stated to be compatible with your machine. This will ensure that the pressure is optimally built up and the espresso is perfectly extracted.

Can I visit you or pick up the goods personally?

Yes, of course, you are welcome to come by and look at our products by appointment. We would be happy to advise you personally. The best thing to do is to send us an email with a few suggested appointment times.

We are located 5 minutes from the motorway between Stuttgart and Lake Constance on the edge of the Black Forest.

Important note, first use coffee grinders

Another little tip for the perfect start with your new mill:

You will get the best grinding result after you have ground about 1-2 kg of beans. It is best to use a few cheap beans so that the grinder can work optimally. And if you are wondering what you can do with the bean flour - it is perfect plant fertilizer! 🌿

It contains nitrogen, potassium, sulfur and phosphorus and is a real nutrient bomb for your plants.

Könnt ihr bei meiner Siebträgermaschine eine Offset Kalibrierung durchführen ?

Es gibt einige Argumente, die gegen eine Offset-Kalibrierung bei Lelit-Siebträgermaschinen sprechen, insbesondere bei Modellen wie der Lelit Bianca. Diese beziehen sich vor allem auf die Komplexität und die Limitierungen des Offsets als alleinige Lösung für Temperaturprobleme:

  1. Temperaturschwankungen und Instabilität. Der Offset berücksichtigt eine konstante Differenz zwischen Kesseltemperatur und Brühtemperatur. In der Praxis können jedoch Temperaturschwankungen auftreten, z. B. durch längere Standzeiten oder kontinuierliches Brühen. Dadurch ist die tatsächliche Brühtemperatur nicht immer präzise vorhersehbar.
  2. Abhängigkeit von Umgebungsbedingungen. Faktoren wie Raumtemperatur, Luftfeuchtigkeit und der Zustand der Maschine (z. B. Aufheizzeit) beeinflussen die Brühtemperatur erheblich. Ein fester Offset kann diese Variablen nicht dynamisch ausgleichen, was zu ungenauen Ergebnissen führen kann.
  3. Wärmeverlust bei Standzeiten. Nach längeren Pausen kühlt die Brühgruppe ab, und die Maschine benötigt Zeit, um wieder auf die gewünschte Temperatur zu kommen. Ein korrekt eingestellter Offset kann dies nicht kompensieren, weshalb zusätzliche Maßnahmen wie ein “Cooling Flush” nötig sind.
  4. Fehlkalibrierungen ab Werk. Bei einigen Lelit-Modellen wurde festgestellt, dass der Offset ab Werk oft ungenau eingestellt ist (z. B. 4–8 Grad zu niedrig bei der Lelit Bianca). Dies erfordert eine manuelle Nachkalibrierung durch Fachpersonal, was für Endnutzer kompliziert sein kann.
  5. Missverständnisse in der Anwendung. Viele Nutzer sind durch widersprüchliche Informationen zur Offset-Einstellung verunsichert, was zu Fehlanpassungen führen kann. Beispielsweise wird oft erwartet, dass der Offset allein alle Temperaturprobleme löst, obwohl er nur ein Teil eines komplexeren Systems ist.

Fazit
Die Offset-Kalibrierung ist ein nützliches Werkzeug, aber sie sollte nicht isoliert betrachtet werden. Eine Kombination aus präziser PID-Steuerung, regelmäßiger Wartung und angepassten Techniken (z. B. Spülshots) ist notwendig, um optimale Brühergebnisse zu erzielen.

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