Abstract: A centrifuge device is provided which may impart selectively controlled centrifugal force to samples under consideration, or a shaking or agitation movement to the samples, as required. A feature of the invention is the use of two roller clutches on the single drive shaft of the device so that a selective movement may be imparted to the samples through the same drive by utilizing a locking mechanism to provide rotation from the shaft in opposite directions. Rotation in one direction causes the imposition of centrifugal force through one clutch, while rotation in the opposite direction causes rotation through the second clutch and the imposition of agitation. In that direction, the sample support mechanism is moved vertically, controlled by a cylinder cam. A further feature of the invention is selective agitation movement and selective degree of agitation through selection of a particular cam profile.