Abstract: A roll belt conveyor having a shaft that supports, adjacent to both ends, the inner ring of a rolling bearing whose outer ring carries a cylindrical tube encompassing the shaft, there being provided a seal on the outside of each rolling bearing, the roll comprising a ring-shaped bearing housing that presents an external peripheral surface, encasable through elastic deformation, into a superficial internal recess of the cylindrical tube, so as to lock, radially and axially to this the ring-shaped bearing housing, and retaining the adjacent rolling bearing against radial and axial displacements, at least in the inward direction of the roll.