Cam grinding machine

A cam grinding machine including a machine frame, a turning grinding wheel adjacent the frame, a swingable table positioned opposite to the frame, a turnable work shaft for holding a workpiece mounted on said table, the table being arranged to be controlled in its swing movement by a touch roller means and a master cam means which are disposed to face one another between the table and the machine frame so that the workpiece may be ground by the turning grinding wheel which is provided on the forward side in the forward and rearward swing direction of the table, characterized in that the touch roller means is provided on the table, the master cam means is provided on the machine frame, and a driving shaft for the master cam means is adapted to be turnable synchronously with turning of the work shaft also to be adjustable in its turning phase in relation to the work shaft, said master cam means including plural master cam members which are different in shape one from another and disposed side by side, and the touch roller means is movable to be positioned at any selective position facing any predetermined one of the respective master cam members, said master cam means being mounted on a free end portion of the driving shaft that projects outwards from a bearing portion thereof so that the master cam means thereof is detachable therefrom in its axial direction, and a stock means for other master cam means is provided on one side of the driving shaft with said other master cam means also including plural master cam members so that the other master cam means on the stock means and the master cam means on the driving shaft are replaceable with one another through an intermediate replacement means.