Grinders & Scales

Burr Grinder

The single biggest upgrade to any coffee setup

Grind stage
Burr Grinder — illustrated reference plate3D model available
Specification
What it doesCrushes roasted beans between two burrs. The distance between them sets the particle size; the uniformity of that size sets the quality of the cup.
Flat vs conical burrsFlat burrs produce a narrower, more bimodal distribution and are usually preferred for espresso clarity. Conical burrs produce more fines, are cheaper to make well, and give a rounder body.
Stepped vs steplessA stepped adjuster clicks between fixed positions — repeatable, easier to return to a known setting. Stepless allows very fine adjustment and is better for dialling espresso in, but harder to record.
Espresso-capableNot every burr grinder will go fine enough for espresso, and of those that do, not all hold a setting under load. Check the espresso range specifically, not just "burr".
RetentionGround coffee left inside the chute from the previous dose. Low retention matters most when you switch beans or single-dose.
StaticFine grounds cling to everything. Anti-static treatment, a spritz of water on the beans, or a grounded chute all help.
NoiseBurr grinders are quieter than blade grinders but still loud enough to matter in a small kitchen at 6am.

Overview

A grinder that crushes beans between two hardened burrs set a fixed distance apart. Because the gap is fixed, the particles come out in a narrow band of sizes — which is what makes extraction repeatable.

EspressoPour OverFrench PressMoka PotCold Brew
Safety

Never reach into the burr chamber or the chute with the grinder plugged in. Unplug before clearing a jam, and keep the hopper closed while running.

Technical parameters

At a glance
Burr typeFlat or conical, hardened steel
AdjustmentStepped or stepless
Espresso rangeVerify explicitly — not all burr grinders reach it
RetentionLow retention preferred for single dosing
Typical noise75–90 dB
Burr life500–1200 kg of coffee before replacement

What actually goes wrong

  • Change grind size in small steps and pull a shot after each one; large jumps overshoot and waste beans.
  • Purge a few grams when you change beans or setting — the first dose is mostly the previous one.
  • Brush the chute weekly. Old grounds go stale and taint every following dose.

What it has to match up with

  • Basket sized for the dose
  • Dosing funnel
  • WDT tool
  • Coffee scale
See it in 3D

The Grind Size Visualizer models this in three dimensions and shows the numbers changing as you adjust it. It is a teaching simulation, not a substitute for the equipment’s own instructions.

This guide is an independent educational reference. It is not a substitute for the instructions supplied with your own equipment, and nothing here is sold, sponsored or endorsed by any brand.

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