Abstract: A roller mill has two pairs of parallel rolls, each pair comprising fast and slow rolls driven in opposite directions. In a flour mill, wheat is ground between each pair of rolls to produce flour. A drive motor drives a first one of the fast rolls through a V-belt drive. The driven fast roll drives the second fast roll through a 1:1 endless chain drive. The slow rolls are driven in an opposite direction and at a slower speed than the fast rolls by a serpentine chain drive engaged with a slow roll, a fast roll, and the other slow roll, in that order. Both chain drives are arranged next to each other at one end of the roller mill and are housed in a common oil bath housing containing oil for lubricating the drive chains. The chain drive eliminates the need for a lineshaft and drive pulleys, as well as a jackshaft and idler pulleys, and associated bearings and guarding that are normally used with a prior art belt-driven roller mill.