Steel; 18.625 in. O/a lg; no. 405 woodruff key slot at one end; 0.125 in. Wide by 0.188 in. Length of slot; 0.250 in. W of groove at keyed end; 0.875 in. Length of taper at keyed end; second end of shaft tapered only; 0.625 in. Diameter of hole drilled 0.938 in. Deep at keyed end