Abstract: Support apparatus for a movable tool head drive for a machine tool comprising a stand on which is fixed, a table on which is slidably movable, a framework comprising an upper transverse member which supports a movable tool head. The framework is in the form of a closed vertical frame having spaced vertical posts and a lower transverse member mounted below the table, the vertical posts being joined by the upper and lower transverse members to provide the closed configuration of the frame.

Abstract: A hole-forming tool comprising a body adapted for being driven in rotation and including a front portion having an axial bore. A plurality of cutting plates are removably secured to the front face of the front portion of the body for cutting a ring of material from a metal workpiece while leaving a non-cut core in the axial bore. The body carries an ejector in the bore for ejecting the core at the end of the cutting operation. The ejector can be a slidable member which is resiliently urged into the bore and which opposes the core to effect displacement thereof from the workpiece when the tool has completely cut through the workpiece. A system is also provided for axially distributing a lubricating liquid through the bore to the cutting plates.