2006-1-7 I use pipe fittings for grinding the marbles down and the same ones for pre-polishing. Either black pipe or galvanized. The one I use the most on small marbles is a 1/4" coupling with a 1/4" close nipple. These are screwed right onto the flex coupling that is on the motor shaft.
2012-11-15 One crystal sphere made on a machine like this measured 1.202" +-.001" at every diameter that I measured with dial calipers. For these machines, I definitely recommend diamond filled grinding cups. You can make your own using diamond filled brazing rods from sphereheaven. The rods are easy to use and the resulting
2018-7-15 HEAVY DUTY 3 Head Sphere Making Machine for sale with new motors. Machine speed is 154 RPM and can handle large spheres. Comes with one set of grinding cups and Velcro Backer pads for using the flexible diamond pads. No shipping available - must be picked up at the shop in Nipomo, CA.
Anatomy of a 3-Headed Sphere Machine Interested in Rolling Your Own? by Bob Keller The sphere machine documented here is one of a trio of three-headed sphere making machines patterned on this general layout that were once manufactured by E J (Esther and Joe) Adams Lapidary.
Lapidary Machines, Lapidary Suppilies and Lapidary Accessories. 4" Diamond Cutting Cups (come with 3/4" National Pipe Thread) To adapt these Diamond Cutting Cups to Covington sphere machines use the PTA383 shaft adatpters for the Model 383 sphere machine and PTS381 shaft adapters for the Model 381 sphere machine.
Sphere machines and diamond grinding sphere cups ... Large Sphere Machine Extra Cups (Model #)Head machine takescups. Cup Size: Sphere headed machine I made to turn wrought cut stones into perfect spheres. This is the first stage of the process, diamond cutting heads I made out of ...
The final grinding is best done in a specialized piece of lapidary equipment called a sphere machine. There are two- and three-cup sphere machines. These opposing cups exert pressure from opposite sides and support the bumpy sphere, while still allowing the sphere to randomly rotate. This is a multi-step process that uses grit and water. A ...
2018-7-14 How to make a large homemade telescope, including grinding polishing, and testing the homemade telescope mirror. Lots of photos and guidance on telescope making. DIY Mirror Grinding and Telescope Making. Bill's Homemade Telescope Making Project This web page provides an overview of my large homemade telescope making project
Alibaba offers 1,994 stone ball making machine products. About 15% of these are mine mill, 13% are stone machinery, and 1% are grinding equipment. A wide variety of stone ball making machine options are available to you, such as cnc router, ball mill, and stone cutting machine.