movement along a z axis at right angles to the x axis a second slide 20 can be moved on the column 19 along a y axis perpendicular to the x axis and to the z axis the x axis the y axis and the z axis form a rectangular coordinate system the grinding wheel 12 is mounted so as to rotate on the second slide 20 a clamping device 21 for holding the blade 1 is mounted on the slide 18 the clamping device is bearing mounted relative to the slide 18 by a swivel axis c u2014 c and an axis of rotation a u2014 a perpendicular to the swivel axis c u2014 c the x axis the y axis the z axis the a u2014 a axis and the c u2014 c axis can be used not only for positioning but also to traverse cnc controlled paths a chronological description of the operation of grinding the blade i with the grinding wheel 12 is given below the rake flank c is oriented parallel to the conical grinding surface pp such that the shoulder surface cs of the rake flank c is positioned at the curved grinding surface 14 with the radius rs the rake flank c and the associated shoulder surface cs are ground using reciprocating grinding with relatively successive feed of the blade 1 in relation to the grinding wheel 12 the left hand flank 5 is oriented with the minor flank b parallel to the conical grinding surface pp with the shoulder surface bs being positioned at the curved grinding surface 14 with the radius rs.