a machine tool has a work table which defines a working surface and has a cutting tool which is attached to and movable with respect to the work table . the position of the cutting tool with respect to the working surface is controlled by a mechanism which elevates the cutting tool with respect to the working surface and angulates the cutting tool with respect to the working surface . the cutting tool is mounted to a support plate which is pivotably attached to the work table . the elevating mechanism includes a threaded rod and a nut which engages a pivoting link . the pivoting link also engages the cutting tool . rotation of the threaded rod pivots the link which in turn raises and lowers the cutting tool . a spring biases the cutting tool towards its lower position to remove play between the components . the angulating mechanism includes a lever , two cams and a locking rod . rotation of the lever moves the locking rod longitudinally due to the action between the two cams . the longitudinal movement of the rod compresses the support plate between the work table and a bracket to maintain the position of the support plate with respect to the work table . also included is an integral arbor wrench which is accessible when the throat plate is removed to lock the arbor to facilitate tool changing . the wrench is designed to not allow reassembling of the throat plate when the wrench is in engagement with the arbor shaft .