A harvester comprising: a pair of oppositely facing sidewalls (210, 212, 500) attached to a frame or a subframe of the harvester; at least one material spread roll, positioned transversely between the pair of sidewalls (210, 212) and about a rotational axis, the at least one material spread roll comprising: (i) a roll tube (230, 410, 620) comprising an exterior surface, a longitudinal length and at least one face on at least one end of the longitudinal length, said face defining a width of the roll tube (230, 410, 620); (ii) at least one cap (234, 432) positioned over or proximate to the at least one face of the roll tube (230, 410, 620), said cap (234, 432) comprising a base portion and a pin portion; and (iii) at least one bearing mechanism comprising a bearing (330, 540, 634) and a flange; wherein the base portion of the at least one cap (234, 432) comprises oppositely positioned an inner surface and an outer surface laterally positioned relative to the roll tube (230, 410, 620) and oppositely a contiguous ring surface axially positioned relative to the roll tube (230, 410, 620); wherein the pin portion of the at least one cap (234, 432) comprises an outer surface and is longitudinally positioned around the rotational axis; wherein the inner surface of the base portion of the at least one cap (234, 432) covers, is adjacent to, or is proximate to the at least one face of the roll tube (230, 410, 620); a coil (232, 420, 422) is positioned around the outside surface of the longitudinal length of the roll tube (230, 410, 620); and wherein the bearing (330, 540, 634) is positioned around the pin portion of the at least one cap (234, 432) and the flange is mechanically linked to at least one sidewall of the pair of sidewalls (210, 212, 500); characterized in that the base portion of the at least one cap (234, 432) comprises a ring groove circumferentially positioned along the ring surface of the cap (234, 432), wherein the ring groove is capable of preventing wrapping material from contacting the bearing mechanism, wherein the base portion covers the end of the roll tube and the ring groove has a diameter greater than the diameter of the roll tube. a pair of oppositely facing sidewalls (210, 212, 500) attached to a frame or a subframe of the harvester; at least one material spread roll, positioned transversely between the pair of sidewalls (210, 212) and about a rotational axis, the at least one material spread roll comprising: (i) a roll tube (230, 410, 620) comprising an exterior surface, a longitudinal length and at least one face on at least one end of the longitudinal length, said face defining a width of the roll tube (230, 410, 620); (ii) at least one cap (234, 432) positioned over or proximate to the at least one face of the roll tube (230, 410, 620), said cap (234, 432) comprising a base portion and a pin portion; and (iii) at least one bearing mechanism comprising a bearing (330, 540, 634) and a flange; (i) a roll tube (230, 410, 620) comprising an exterior surface, a longitudinal length and at least one face on at least one end of the longitudinal length, said face defining a width of the roll tube (230, 410, 620); (ii) at least one cap (234, 432) positioned over or proximate to the at least one face of the roll tube (230, 410, 620), said cap (234, 432) comprising a base portion and a pin portion; and (iii) at least one bearing mechanism comprising a bearing (330, 540, 634) and a flange; wherein the base portion of the at least one cap (234, 432) comprises oppositely positioned an inner surface and an outer surface laterally positioned relative to the roll tube (230, 410, 620) and oppositely a contiguous ring surface axially positioned relative to the roll tube (230, 410, 620); wherein the pin portion of the at least one cap (234, 432) comprises an outer surface and is longitudinally positioned around the rotational axis; wherein the inner surface of the base portion of the at least one cap (234, 432) covers, is adjacent to, or is proximate to the at least one face of the roll tube (230, 410, 620); a coil (232, 420, 422) is positioned around the outside surface of the longitudinal length of the roll tube (230, 410, 620); and wherein the bearing (330, 540, 634) is positioned around the pin portion of the at least one cap (234, 432) and the flange is mechanically linked to at least one sidewall of the pair of sidewalls (210, 212, 500); characterized in that the base portion of the at least one cap (234, 432) comprises a ring groove circumferentially positioned along the ring surface of the cap (234, 432), wherein the ring groove is capable of preventing wrapping material from contacting the bearing mechanism, wherein the base portion covers the end of the roll tube and the ring groove has a diameter greater than the diameter of the roll tube.