It is therefore a main object of this invention to provide a grinding wheel support arrangement in which the grinding wheel is capable of being positioned precisely vis a vis a workpiece and, more importantly, this precise positioning is capableof being maintained by hydraulic clamping means to improve the reproducibility capabilities of the grinding machine.

The novel grinding wheel support arrangement of this invention includes as the principal adjusting means a first post which can be reciprocally moved in a direction normal to the support table by gear and/or thread adjusting means. This firstpost supports a housing in which the bearings for the grinding wheel drive shaft are mounted. These bearings are substantially coaxially aligned with respect to the longitudinal axis of the first post. In a manner similar to my prior inventive grindingwheel support arrangement a second fixed post pivotally supports an intermediate member which is in turn pivotally connected to the housing in which the bearings for the grinding wheel shaft are mounted. This housing is also supported directly on thehydraulic piston cylinder via a member that is mounted on the grinding wheel shaft. The roller bearings for the grinding wheel shaft are disposed in axial alignment with the hydraulic piston cylinder.