Abstract: A bale processor of a type having flail rotor providing an outer support surface with a plurality of flails mounted thereon are mounted for movement therewith around a flail rotor axis for engaging the bale and removing material from the outside of the bale. A plurality of depth control bars are disposed between adjacent flails for controlling the distance that the outer end of the flails extend into the outer surface of the bale. In one embodiment the depth control bars are positioned close to the outer support surface of the flail rotor whereby the depth control bars prevent a buildup of twine or netwrap on the outer support surface of the flail rotor. In another embodiment engagement members rigidly attached to the frame, separate from the depth control bars, are disposed between flails for preventing a buildup of netwrap/twine on the flail rotor.