Is there a way to determine what the maximum diameter that can be turned from a square piece of wood? For example You have a blank 2"x2" x10" Can you get a 2" diameter blank? Thanks John

Max. Dia. of a square piece of wood ??? The way I find out is to first, find the center of smaller end then take a compass and set it in the center with one leg and touch one side with other leg, then sweep compass in circle, adjust center until you get a full circle around your square piece of wood. That will tell you your max size, then do as Jerry mentions above.

John, the short answer is a square blank, centered precisely, will yield a diameter that is the same as the width of the sides. That being said, almost always off by about 1/16”, so always start with a blank with sides just a little more than final diameter wanted.

I find center , use an awl to mark it and scribe a circle. That's only going to get you a close idea of what you can get out of the blank. Once its mounted you may end up taking more with your roughing out.