A coffee grinderCoffee Grinder is the name used for a mill to convert the bean into a powder. In fact the grinder "tears" coffee more than it grinds it, when... that grinds by passing a flow of beans between a pair of rotating metal discs.: A coffee grinder that grinds by passing a flow of beans between a pair of rotating metal discs. The distance between the discs is adjustable, and this adjustment allows one to accurately set the size of the grind.
The larger the diameter of the burrs, the faster the grinder is able to grind. Burr grinders can be either “conical” or “flat” burred, each with their own advantages. Ironically, both the cheapest and the most expensive espressoA small coffee beverage, about 20 ml, prepared on an espresso machine where pressurized hot water extracted through compressed coffee.: In its most stripped-down, basic form, this is... grinders have conical burrs, while mid-range burr grinders and commercial bulk coffee grinders have flat burrs.
Grinders can also be divided into “doser” and “doser-less” models: a doserA doser is a mechanism, usually attached to the front of a burr grinder, for putting coffee into an espresso portafilter basket.: A doser is a mechanism, usually... is a mechanism for dosing ground coffee into a portafilterThe part of an espresso machine which holds the filter basket, into which coffee grounds are placed.: The part of an espresso machine which holds the filter basket,... for espresso. Doser models may be more convenient for espresso, but are more difficult to use when grinding coffee into a container for brewed coffeeBrewed Coffee refers to all coffee preparations produced by adding non-pressurized water to coffee grounds. Contrasted with espresso coffee, which is produced under pressure, brewed coffee is primarily....