Small Centrifugal casting machines are often used by silversmiths and in the dental industry.
The video below demonstrates the basic operation of a Centrifugal casting machine for the jewelry creation process.
Where can you buy a small casting centrifuge?
The most affordable and trusted place we have found to purchase is eBay, you can pick up a small "Dental Laboratory Centrifugal Casting Machine" for under $200 USD on Amazon you may be able to get better prices at alibaba.com but "caveat emptor" buyer beware, unless you completely trust the seller do not pay via Western Union or Money Gram as its impossible to get your money back and is often used by scammers.
Let us know in the comments about what you want to make? what you have made? or where you intend to get your own machine?