Subject to correction, (It's sixteen years since I sold mine ) the Rodney was driven by a splined drive from the Mandrel of the Myford 7 Series.
The drive was rotated from horizontal to vertical by bevel gears at the base of the vertical column.
The spindle was 2MT with the same 1.125 x 12 tpi thread as the Myford Mandrel.
A fairly light duty device, to my mind.
Howard