Abstract: A double-head automatic grinding machine which comprises a machine base, a work table supported on the base for movement in the longitudinal direction of the base and supporting a main shaft support block and an opposing tail stock for pinching a workpiece therebetween, a grinding wheel support block movably supported on the machine base for movement towards and away from the table in a direction normal to the table movement path, a vertically movable lifting block slidably mounted in the grinding wheel support block and supporting a pair of grinding wheel shafts in a vertically spaced relationship.

Abstract: A grinding machine in which three cup-shaped grinding wheels are disposed spaced from each other by the distance of 120.degree. in different heights spaced from each other by a distance corresponding to one third of the feed pitch of a work to be processed to thereby ensure the removal of a substantial amount of the material from the work at one time and the precise cutting of the work.