Abstract: These as well as other objects are accomplished by an improvement to a computer numerically controlled apparatus wherein there is provided a vertically oriented workholder including means for guiding the workholder into and out of the enclosure of a computer numerically controlled apparatus. The workholder includes means for holding a plurality of shafts in a vertical orientation to permit the plurality of shafts to be machined within the computer numerically controlled apparatus with only one loading and unloading of the apparatus.