tags: [] - coffee/brewing - coffee/equipment/grinders aliases: - Grind setting adjustment - Adjusting grind size - Dialling in grind

Grind Adjustment¶

Tags: #coffee/brewing #coffee/equipment/grinders Aliases: Grind setting adjustment, Adjusting grind size, Dialling in grind Related: Espresso Dialling | Extraction | ../Maps of Content/Grind Size MOC | Barista Skill Progression Levels Status: ✅ Complete

Overview¶

Grind adjustment is the mechanical process of changing the grind setting on a coffee grinder to produce a coarser or finer grind. Understanding how adjustments work on different grinder types, how much to adjust, and how to evaluate the result are practical skills central to consistent espresso and filter coffee preparation.

How Grinders Work¶

All grinders reduce whole coffee beans to grounds by passing them between two abrasive surfaces called burrs. The distance between the burrs determines grind size:

Burrs closer together: Finer grind
Burrs further apart: Coarser grind

Adjustment changes this distance. The mechanism varies by grinder type.

Grinder Types and Adjustment Mechanisms¶

Stepped Grinders¶

Stepped grinders have discrete adjustment positions — clicks or numbered positions — that move the burrs by a fixed increment each step. Examples include many Mazzer models, Anfim, and entry-level Mahlkönig grinders.

Adjustment: Turn the adjustment collar one click at a time
Direction: Turning clockwise typically means finer; anticlockwise means coarser (varies by model)
Increment size: Varies; some grinders have large steps (significant extraction change per click), others have finer steps
Assessment: Pull a shot after each single-click adjustment

Stepless Grinders¶

Stepless grinders allow continuous adjustment with no clicks — the collar can be stopped anywhere. Examples include the Mahlkönig EK43, Anfim Super Caimano, and many competition-grade grinders.

Adjustment: Turn the collar by a small, consistent amount — typically 5–15° of rotation for a meaningful change
Direction: Check the grinder's markings; typically marked with "+" for coarser and "–" for finer
Precision: Greater — but also easier to overshoot
Assessment: Very small adjustments; evaluate carefully

Grinders with Digital or Numerical Settings¶

Some modern grinders (for example, the Mahlkönig E65S and Mazzer Kony E) have digital displays or numerical settings. These provide reference numbers for settings, making it easier to return to a known position.

The Grind Chamber and Purging¶

When the grind setting is changed, the coffee already inside the grinder's chute and chamber was ground at the previous setting. This coffee must be purged before pulling an evaluation shot — otherwise the shot represents a mixture of old and new settings.

Purge method: 1. Make the adjustment 2. Run the grinder for 3–5 seconds (or until the chute is clear) without dosing into a portafilter — grind into the knock box or a cloth 3. Dose normally for the evaluation shot

Failing to purge is one of the most common errors when dialling in and produces misleading results.

How Much to Adjust¶

A common error is adjusting too aggressively. The standard approach:

One click (stepped) or a very small rotation (stepless) at a time
Evaluate, then adjust again if needed
On most grinders, a single click changes extraction time by 2–5 seconds

When a larger adjustment is appropriate: - When starting from an entirely unknown setting (for example, a new grinder or after a major climate shift) - After a bag change to a very different coffee - When the current extraction is dramatically off (running in under 15 seconds or over 45 seconds)

In these cases, a larger initial adjustment is justified to get within range, followed by fine adjustments.

Direction Reference¶

Most grinders are marked, but adjustment directions vary between models. Confirming the direction on any new grinder by making a small adjustment and checking whether the next shot runs faster or slower is the safest approach.

A basic reference once direction is confirmed: - Shot too fast → finer → adjust in the "slow it down" direction - Shot too slow → coarser → adjust in the "speed it up" direction

Common Errors¶

Error	Consequence
Not purging after adjustment	Evaluating a mixed-setting shot
Adjusting multiple clicks at once	Overshooting; difficulty finding the right setting
Adjusting grind to fix a channelling problem	Wrong diagnosis; problem persists
Adjusting grind to hit a time target while ignoring yield	Arbitrary; may not reflect actual extraction quality
Not tracking the starting position	Cannot return to the previous setting if adjustment makes things worse

Recording Settings¶

Recording the grind setting alongside the recipe is standard practice — especially when changing bags:

Coffee: Ethiopia Guji natural, 250 g bag opened 3 days ago
Grinder: Mazzer Major, setting 7
Recipe: 18 g in / 38 g out / 29 seconds
Notes: Slightly fast on first pull; moved to 6.5

This record enables a faster return to the target setting next time and builds a useful reference across coffees and seasons.

Key Facts¶

Grind adjustment changes the distance between burrs to alter grind size: closer produces finer; further produces coarser
The grind chamber must be purged after every adjustment — existing grounds mix with the new setting until cleared
Adjustments should be made in the smallest useful increment: one click (stepped) or a small rotation (stepless)
On most grinders, a single click changes extraction time by 2–5 seconds
Recording settings alongside the recipe reduces dialling-in time when returning to a coffee

References¶

Changelog¶

Date	Change
2026-05-03	Compliance review: added frontmatter, metadata block, all required sections; removed navigation arrow; fixed path-prefixed wikilink; removed Assessment section; converted second-person to third-person; removed internal separators; replaced non-standard footer with copyright block

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