Bluenoser wrote:I don't understand this.. an espresso grinder that can't produce a grind fine enough to deliver shots with a traditional pump machine?.
It's not a question of going fine enough. It's a about the type of the grinds.
Typical espresso grinders produce two types of grinds: the grind size you set it to, but always some finer grinds as well.This is by design and the function of those additional finer grinds is to add resistance to the water passing through the puck so that you can get to 9 bars of pressure. Most espresso grinders fall in to this category: Monolith, Niche, Eureka Atom 75, Mythos etc.
Atom Pro and EK43 are on purpose desinged not to produce those additional finer grinds. They are a very specific design. The main benefits of a grinder producing just one grind size are getting a better tasting cup because you won't have the fines which always by definition over extract and taste bitter. Also when used for brew methods the fines won't clog up your filter paper.
That's why for brew methods the best grinders are unimodal since you really have only upsides and no downsides. For espresso not having the additional fines is a clear downside because it's more difficult to get the needed pressure. So you sort have to really know what you are doing. But when you do and the beans are right, you are rewarded with some phenomenal god shots that are impossible to produce with traditional bimodal espresso grinders.
Basically to put it simply if you do not specifically know that you want a unimodal espresso grinder, then don't buy Atom Pro or EK43. But if you do, Atom Pro seems to be the most cost effective way at the moment.