What kind of bean grinder does a good Espresso need?

To make a good espresso, you need to grind the beans just right so that the extraction time is controlled at about 25 seconds. And what you grind in the store, first, the coffee goes bad faster. Second, it may (almost certainly) not suit you. You will even find that you have to adjust the thickness of the same beans at different times. Bean grinder there is a kind of bean grinder called propeller can not be bought! That one looks like a cylinder with a transparent lid on it, and you can see two blades that look like propellers (such as Pegasus).

First, this kind of bean grinder has no control to adjust the thickness, only depends on the length of time, no, depends on luck. Second, the thickness of this bean grinder is uneven, some are too fine, some are too thick. Third, this kind of machine can not grind the fineness required by espresso at all. Fourth, this kind of grinding beans will produce high fever, which will do great harm to the taste of coffee! (depending on different models)

So what is a good bean grinder? Generally speaking, people like it, the most basic is solis 167or 167, which can be regarded as economical and affordable. But, of course, it's best to buy one of this level like Rancilio Rocky!