Which cutting tool for internal sphere turning

[ronaldinho_07]

I need to make a internal sphere.
Look like this,its link for mandrel assembly.
Which cutting profile to do this ?
Thank you

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[Ukraine Train]

Without getting into custom tooling, I'd probably drill, bore, then use a full radius 90° groover to get most of the sphere and then use a small VNMG to finish the far end where the groover doesn't fit. The VNMG might be able to finish the whole sphere if there is enough offset.

 

[ronaldinho_07]

here is my drawing.
Can you recommend what exactly tool holder size and how much angle that i should use for this
I am going to drill a 10mm hole first
I've not run any cnc lathe yet
i will try them on my DIY cnc lathe lol
Test my diy lathe - YouTube