CNC 235 G Female thread machining tool The CNC 235 G female thread machining tool is equipped with a vertical workpiece spindle in the upper area of the machine. The tools are firmly arranged in the lower area of the machine. Either hard turning tools are used exclusively or, in addition, grinding spindles or revolving turrets are used. The machine is particularly suitable for hard turning spherical collar nuts with high pitch. Additional tools in the working chamber make complete machining possible with one clamping operation.