Why are you rolling your eyes?
1.) I have no idea what ID is required but when I buy drills, I can specify the diameter to .01mm so I think I could get one close enough.
2.) Read what I wrote. I clearly state that you turn the OD whilst supporting both ends and then alter the workholding to a collet so you can drill through, or half way.
What do I know, I'm just in charge of a turning section in an engineering company, you're the lecturer. What do they say though? Those that can, do. Those that can't, teach.
:roll:
1.) I have no idea what ID is required but when I buy drills, I can specify the diameter to .01mm so I think I could get one close enough.
2.) Read what I wrote. I clearly state that you turn the OD whilst supporting both ends and then alter the workholding to a collet so you can drill through, or half way.
What do I know, I'm just in charge of a turning section in an engineering company, you're the lecturer. What do they say though? Those that can, do. Those that can't, teach.
:roll: