Hoffman on the Duo

i didnt say the speed had changed, i said they took longer to grind.

Cuprajake My SSP MP burrs are taking 45s to grind 18g of beans. This is double the mazzer equivalent

as is the stock mazzer burs take about 20s while the mazzer filter take about 10s.

there is more than enough torque but when you look at the cut of the burr its totally different to a ‘stock’ burr from many manufacturers, no pre breakers.

for me, im not very filter driven, never really have been, i prefer the kick of espresso lol

Cuprajake
Dont worry - I did not understand u as saying that the grinder has itself changed its speed of rpm. I took u to mean thar the speed in terms of the set rpm of the grinder had been optimised for the 151b burrs and thus it would take longer than it would be otherwise to grind if the rpm had been optimised for the new set of burrs.

drdre89
It does look and sound like a good grinder from the perspective of its mechanicals. Which is why I thought it would expand its market even more if it offered alternative burr options. Even mazzer itself is now offering high clarity focused burrs for the new philos and a more traditional set of burrs as the alternative burr option, so this is a good idea for niche to also follow its own burr supplier in doing …

chlorox

The duo has an RPM of around ⅓ of normal grinders. This allows it to have a higher torque and possibly other benefits (reduction of coffee grinding against itself).

The reason the Duo can still have an acceptable grind time is because it uses commercial burrs with aggressive teeth designed to be used with a high torque 3phase grinder. The duo still grinds ⅓ slower as the commercial grinder, but when the original grind time is 6s, 18 isn’t that bad. Going from a 17s grind time to a 50s grind time would be more painful.

Edit: I should also mention that the 151b burrs should not be used in most consumer grinders. They won’t have the torque to properly drive them.