The Sorvall RC-5B and Sorvall RC-5C are the gold standard of reliability in superspeed centrifuges. The RC-5B and the RC-5C centrifuge drive systems are equipped with a Universal/Drive motor, designed and manufactured by Sorvall, with automatic programmed acceleration and braking features. The motor armature is balanced to give quiet operation with minimum vibration over a full range of speeds. This feature extends the life of the bearings and brushes