of bolt 56 in the direction of arrow 100 movement of frame 12 in a direction having a z component in the direction of arrow 98 is as noted above accomplished by movement of the jaw 58 along the threaded bore 110 upon rotation of lead screw 108 see fig5 referring now to fig7 9 a presently preferred embodiment of an apparatus for mounting a cutting tool not shown in fig7 9 see reference numeral 40 in fig1 is indicated generally at reference numeral 38 the mount 38 is comprised of a compound 44 having a tool holder 46 mounted thereto and a drop plate 42 for mounting in the particular embodiment shown to the carriage 34 that runs on the track 32 formed on cross arm 30 and a plurality of holes 118 for receiving bolts not shown are provided in drop plate 42 for that purpose however those skilled in the art who have the benefit of this disclosure will recognize that the mount 38 of the present invention is not limited in its application to mounting a cutting tool to the carriage of an o d mount facing machine such as the apparatus 10 shown herein instead it should be clear from this description that the mount 38 may be utilized to mount a cutting tool to any machine tool the tool holder 46 is mounted to compound 44 by sliding the tongue 120 formed on tool holder 46 into a matching groove 122 formed on compound 44.