I have also drilled pen blanks using a drill chuck attached to a radial arm saw (RAS).
An advantage is being able to use a longer drill bit because of the long parallel travel of the motor.
A disadvantage is that the drill chuck would only take up to 8 mm pen drilling bits.
I could not...
I have been using metric drill bits in a router table to drill pen blanks.
I have been drilling my pen blanks with a "MLCS Powerlift / Porter-Cable / RBI" Router table, which I have previously posted on this forum as an x-y-z router table. RouterForums.com Search term is "x-y-z router...