These pictures show how the trimsaw on a Millbury tenoner is
assembled and adjusted.  The bore is 3/4" to match the shaft.
SS size is 5/16.  There is a tommy bar hole 5/16" dia to hold
the assembly while tightening.  OAL length is 1-7/16".  Stub
spindle is 7/16" long x 1" OD, threaded RH.  Collar is 1.91" OD.
Unthreaded end is 1.45" OD.