for securing carding organs such as the cylinder grid 33 and the flexible bends 30 and 31 for the flat bars 32 only one shown above the flexible bends 30 and 31 and the flat bars 32 return bends 34 and 35 which support the flat bars 36 only one shown are secured to the side walls 2 and 3 for example by means of threaded bolts further referring to fig4 on the base cylinder 1 in a face to face relationship therewith there is positioned a support plate 38 with the interposition of a cylindrical rod 37 the side wall 2 is positioned on the support plate 38 in a vertical orientation the bearing assembly 22 is inserted in a circular aperture of the side wall 2 the bearing assembly 22 extends beyond the outer face of the side wall 2 and is backed up by a bearing pedestal 40 which is secured for example by welding to the support plate 38 and the side wall 2 the rod 37 is horizontally supported in groove like recesses provided in the base plate 1 and the support plate 38 the depth of the groove like recesses is so designed that a clearance 39 is maintained between the base plate 1 and the support plate 38 the recesses and the rod 37 are located for example in that zone of the support plate 38 which is oriented towards the side wall 2 on that side of the base plate 1 which is oriented away from the side wall 2 there are provided.