A grinding instrument, such as a mill, is the only piece of equipment necessary to prepare homemade bread flour. Other instruments that are capable of grinding, such as high-power blenders, are sufficient for grinding small amounts of grain.
Food processors, coffee and spice grinders, and stand mixers with grinding attachments are reliable alternatives to grain mills. The two most common types of grinding mills are burr grinders and rolling grinders.
Rolling grinders pulverize grain between corrugated rolling pins, whereas burrs grind grains between two disks, or burrs, that revolve in opposite directions. The distance between the rolling pins or the burrs is adjustable, and a greater or lesser distance yields a coarse or fine grind.