A high speed rotating drum that houses the flail shaft, and rods, used to retain the flail chains. The drum body is hardened to increase longevity and provide better wear resistance. Flail machines can be used to debark any species of wood, even species of eucalyptuses with the addition of eucalyptus rings. The flail drum is distinguished as an individual wear part. In appearance the part is: a tube with oval holes from which the chains protrude. The shaft, rods, chains, and end plates are separate parts.