Riser stud not included.
The patent pending Perfect Sphere™ Tool is a sphere and concave turning system adaptable to most lathes on the market. The heavy duty construction and flexible configuration allow you to turn spheres from 1 inch to 14 inches in diameter on most lathes from 10" to 25". A Hunter Tool #4 carbide cutter provided with each system enables the tool a to cut the material versus a standard scraper which provides for a smooth cut and long lasting cutter head.
The system comes with an adjustable mounting base that accommodates most lathe bed widths. The only part that is lathe specific is the riser post which is available to fit lathes from 10" to 24/25". The riser post is based on lathe swing height (lathe size) and has nothing to do with the diameter of the sphere you want to turn. Due to the mounting height the largest diameter sphere you will be able to turn is your lathe swing height minus 2". Example for a 12" lathe your max sphere would be 10".