This toy, also known as “double-sphere”, made from two high precision steel bearing balls connected with prism-like aluminum shapes. Two balls become single body and can be spun like a top. It is fun to watch and observe unconventional behavior. For technical explanations click here. The best practice to spin these balls is to use concave glass surface. It is easier to start rotation, and balls remain mostly at the lowest point.
Author’s logo engraved on the stand. Balls dimensions: .875” x 1.625”. Weight: 2.86 oz (81 gr). This toy, also known as “double-sphere”, made from two high precision steel bearing balls connected with prism-like aluminum shapes. Two balls become single body and can be spun like a top. It is fun to watch and observe unconventional behavior. For technical explanations click here. The best practice to spin these balls is to use concave glass surface. It is easier to start rotation, and balls remain mostly at the lowest point.
Author’s logo engraved on the stand. Balls dimensions: .875” x 1.625”. Weight: 2.86 oz (81 gr).