Marble Sphere Grinding Machine | Rock Tumbling Hobby
If you look at my video above, standard lapidary equipment is used to make marble size spheres. The grind is inside a hollowed out SiC grinder wheel and the pre-polish is using granite pades cut to fit inside of appropriately sized pipe fittings. A friend at my class claims as many as 10 per hour can be made of 3/4" size agate cubes.Web
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