Centrifugal force is superimposed on the forces produced by the machine parts. However, in order to produce noticeable effects, substantial speeds are required, and these speeds arise practically only at the main cylinder and to some extent at the licker-in.
The centrifugal forces are effective mainly in directions away from the main cylinder, and act both on fibers and on foreign particles. In spite of this, the fibers are not thrown off (at least the longer ones), because the high air resistance due to the rotation presses the fibers back flat against the surface of the main cylinder. In comparison to all other forces, centrifugal forces are of minor significance except when considering trash and short fibers. In this case the centrifugal forces support the transfer of trash and short fibers from the main cylinder into the flats.