Originally Posted by
brfgmike
I doubt that thread conventer will be the right approach.
If it would be me, I would want to replace the back plate of the chuck you are adopting.
There is a good chance that the chuck has a mounting plate.
But keep in mind threads are only holding it to the spindle, but a taper is what makes it run true and concentric. Have you checked if the new chuck and your lathe spindle nose has the same registering geometry. They should much. That's why making a mounting plate is a right way to go about it.
Youtube "back plate for late" or something of this sort.
You will know how its done and since you have the lathe, you can do it yourself. Or at least have a better idea if what you want going to work.
Sent from my iPhone using Tapatalk