Grinder burrs come in a range of different sizes. This measurement is usually given in millimetres (mm) as the diameter of the grinder’s outer (larger) burr.
Electric home grinder burrs typically start at around 38mm, while commercial models begin around 60mm and can go upwards of 180mm. As burr size increases, so too does the size of the grinder itself.
In general, the larger the burr, the better the performance.
Grinders with larger burrs are more stable, faster, more efficient, and generally require fewer grinding adjustments.
It isn’t just about burr size, however. Geometry and alignment are also important.
The larger the burr, the greater the smaller deviations. This means that subtle variations and correct alignment are more important for large burrs than for small burrs.
Ultimately, most high-quality home grinders will have burrs of around 38mm and above. As you go higher, you will likely find that the grinders become more expensive and less compact for a home kitchen setup.
To sum up, the burr size of the grinding machine is diverse, and the choice of the right size depends on the needs of individuals, whether it is for home use or professional coffee production, there are corresponding grinding bean models and sizes to choose from.
Keywords：38mm coffee grinder burr; 180mm grinder burr