Changing out the arbor on a 21st Century Neck Turning / 3 Way Trimmer Head

[Oso]

I am a new user on a 21st Century Neck Turning Lathe and its other cutter heads. I need to change out the arbor in the 3 Way Trimmer head from .20 cal to .17 cal. How do I remove the existing installed arbor???

I have unscrewed the brass plug on the Trimmer head and attempted to push the arbor back out (pushing to the left toward the trimmer body), but it won't budge. Before I use any force, I thought maybe someone had figured out a better technique then mallet or using a press to drive it out.

Sure would be nice if 21st Century would put together a couple of videos of basic setup of the neck turning head and 3 Way trimmer... not just video of them already setup and being used. I have the manual instructions and there only a sentence allocated to the arbor... not much help.

Thanks for any advise or insight!!!

 

[newbieshooter]

I back out the hex bolt a wee bit that's recessed next to the dial adjustment....

fast forward to the 10:00 min mark -> changing a 20 caliber arbor to a 6.5mm arbor.

 

[Oso]

Thank You - that is exactly what I was overlooking!!!! Busting out the Sharpie to write a note onto tool head ... "Arbor Tensioning Bolt" --->