It takes three things to make great coffee; the coffee machine, the grinder and the coffee maker. Different brewing methods need different grind. All elements of coffee beans start to dissipate as soon as they’re ground, so to get the best from the beans, grind them just before brewing. Think of it as part of the coffee making process.
Grinders are distinguished by:
Consistency: The same size particle, every time.
Granularity: Ranges from fine to coarse.
Low Temperature: Heat alters the flavour and character of coffee. Speed generates heat, so preference low-speed grinders or a motorised grinder with reduction gears.
Low-noise operation: Because if it sounds like there’s a plane landing in your kitchen every time you grind, that just ain’t right.