Machine for backing-off and/or grinding drifting spindles provided with teeth

A machine for backing-off and grinding drifting spindles provided with teeth comprising a sliding table and a grinding spindle and associated conical grinding wheel mounted on a support on said table, with said support being oriented and movable transversely with respect to said table, mounting of said grinding spindle to said support including a pivotable slide having a sliding plane vertical and parallel to said grinding spindle's axis with a sliding direction being oriented in said plane, said slide having a fixed part and a movable part, said fixed part comprising a cylindrical bore perpendicular to said sliding plane and cooperating with a first journal of a first drum integral with said support of said grinding spindle which allows positioning of said slide in a desired sliding direction by rotation about said journal and further providing a locking means for locking said slide in a desired angular position, said grinding spindle being further supported by a second drum fixed to said movable part of said slide, said second drum having an axis perpendicular to said spindle and comprising a second journal cooperating with a bore in said movable part of said slide in order to allow angular positioning of said grinding spindle with respect to said sliding table in a plane parallel to the sliding plane of said slide, by rotation of said second journal in said bore of said movable part of the slide, said locking means also provided for locking said second drum in a desired angular position.