There are times in the machine shop when you need to make a spherical ball out of metal. You can form grind a tool and plunge the sphere on the lathe, or like Reed Streifthau of the Quorn Owners Yahoo Group, you could use an inexpensive import boring head to make a ball turner. Starting from Reed’s design, this page attempts to document what I came up with.
Ball Turner Manufacture
Starting Work in the Shop
The first stop in the machine shop for all projects is cutting the stock. Here I’m squaring up a piece of hot-rolled mild-steel round stock in the band saw to make the ball turner body. The cant being removed in this photo will be further sawn to make the rotation stops.