Prototypes of magnetically suspended rotors for centrifugation of cells, organic and inorganic solutions, and gases are Fe‐containing glass and metallic hollow microspheres 0.1–2 mm in diameter, composite steel‐glass disks up to 1 cm, and microspheres of porous steel and Fe‐impregnated porous glass. Fe‐coated microcapsules with cells can be used for lower centrifugal forces. Predictable applications include cell hybridization and homogenization, spinning of samples at the ‘‘magic angle’’ in nuclear‐magnetic resonance (NMR), intensification of nuclear fusion by high‐speed rotation of microspheres with deuterium and tritium, and other examples. Rotor contents can be examined under the microscope during centrifugation, or the spinning rotor can be frozen and its contents freeze dried for further examination.