How to use a Milling Machine - Instructions
Milling machine arbors are made in various lengths and in standard diameters of 7/8,1,1 1/4, and 1 1/2 inch. The shank is made to fit the taper hole in the spindle while the other end is threaded. NOTE: The threaded end may have left or right-handed threads. The milling machine spindle may be self-holding or self-releasing.