Analysis of 12 and 20 large teeth burrs on 64mm titanium coated flat blade of coffee grinders
Difference between 64mm 12th large teeth flat knife and 20th large teeth flat knife coffee grinder
2025-06-10
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Difference in the number of teeth on the cutterhead
12 teeth：(coarse teeth)
-There are fewer serrations, larger spacing, and stronger cutting force.
-Suitable for lower grinding, but with slightly lower particle uniformity.
20 teeth ：(fine teeth)
-Suitable for lower grinding, but with slightly lower particle uniformity.
20 teeth ：(fine teeth)
-The serrations are denser, the cutting is finer, and the grinding is more uniform.
-Faster Grinding needs that pursue high precision (such as Ruyi concentration).
-Faster Grinding needs that pursue high precision (such as Ruyi concentration).
The impact on coffee grinding
Grinding speed
12 teeth：
Slower (high efficiency with coarse teeth)
20 teeth：
Faster (fine tooth cutting is more precise)
Particle uniformity
12 teeth：
Slightly lower (may produce more fine powder)
20 teeth：
Higher (more concentrated particle distribution)
Applicable baking degree
12 teeth：
More suitable for medium to deep baking (resistant to rough grinding)
20 teeth：
Suitable for shallow baking (requires uniform extraction)
Risk of fever
12 teeth：
Low (fast grinding reduces friction)
20 teeth：
Slightly higher (with more friction on fine teeth)
Applicable scenarios
12 tooth cutterhead：
-Suitable for brewing methods such as Espresso , Pour-over and French Press that do not require extremely high uniformity.
-Commercial scenarios (such as batch grinding) are more efficient.
-Commercial scenarios (such as batch grinding) are more efficient.
20 tooth cutterhead：
-Suitable for extraction methods such as Espresso and Cold Brew that require high uniformity.
-Home or specialty coffee is better when pursuing flavor levels.
-Home or specialty coffee is better when pursuing flavor levels.
Other considerations
- Material of the cutterhead: Usually made of high grade SUS420 stainless steel or titanium coating SUS420, 20 teeth may wear out faster due to fine cutting (requiring higher hardness)
- Cleaning and maintenance: The 20 tooth cutterhead is more prone to residual fine powder due to tooth density, and needs to be cleaned frequently.
- Motor load: The resistance of the 20 tooth cutterhead is greater, and it needs to be paired with a high torque motor (better for household even the commercial grinders )
- Cleaning and maintenance: The 20 tooth cutterhead is more prone to residual fine powder due to tooth density, and needs to be cleaned frequently.
- Motor load: The resistance of the 20 tooth cutterhead is greater, and it needs to be paired with a high torque motor (better for household even the commercial grinders )
Summary and Suggestions
Select 12 teeth :
·Efficiency priority, suitable for medium to deep roast coffee beans or rough grinding needs , multi-purpose brewing available .
Choose 20 teeth:
·Quality priority, suitable for Espresso or fine flavor control .
If the cutterhead can be replaced (such as some commercial bean grinders), it can be flexibly switched according to the type of coffee.
Enjoy your grinding !
Enjoy your brewing !
Enjoy your brewing !
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While specific steps can vary slightly by model (e.g., Barista Express, Pro, Dual Boiler), the process for replacing the 44.6mm conical burr set (the upper and lower burrs) is generally the same for most Breville espresso machines.
Important: Before starting, unplug the machine. You will likely need a flathead screwdriver, a Phillips head screwdriver, and a 9mm or 10mm wrench (or socket).
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Important: Before starting, unplug the machine. You will likely need a flathead screwdriver, a Phillips head screwdriver, and a 9mm or 10mm wrench (or socket).
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