How to go about making a sphere
G'day all. I'm really hoping someone can help me here.
I'm wanting to create 1/2 sphere shaped holes in some softwood & have no idea how I would go about doing it. I don't have any fancy equipment or machinery, just your basic tools that can be used for drilling & sawing etc.
My idea is to have 2 separate blocks of wood, each with different sized 1/2 spheres that correspond to each other, so that when the top piece is laid on the bottom piece, the 1/2 spheres line up to create complete empty hollow spheres in the middle. And of course, the spheres have to be really smooth.
Each of these spheres would be of a size to completely encase say a 10mm, 13mm, 16mm, 20mm ball, & the ball would not be able to move. So basically a nice neat fit. The largest would be no more than 22mm, & the smallest would be the 10mm.
So, any ideas on how to create these half spheres in each piece of wood reasonably easily.