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...
its a longshot,
I've got a burned out Delta Ras motor, and I still have the table and arm that works great..
I was hoping to mount my bosch router to the arm, same as the motor was,
I'm prepared to make a mounting adapter, but it sure would be nice if they already exist for sale?