BEARING SURFACE FOR THIN WALLED TUBE

1. An elongate link (22, 24) or the like, in particular on agricultural implements, in the form of a hollow member having at least two oppositely disposed and mutually parallel side walls (36, 38) of small wall thickness in relation to their mutual spacing, wherein annular lips (40) which are disposed in alignment with each other in pairs, for receiving a pivot or connecting pin (60) or the like are formed directly from the oppositely disposed side walls (36, 38), the free end faces (46) of said lips facing towards each other and being at a spacing from each other which is less than the internal spacing between the side walls and the lips decreasing in width in a funnel-like configuration tangentially from the outside surface of the side walls (36, 38) inwardly along a curved generatrix to a cylindrical inner portion (46), characterised in that a bearing bush (50) for receiving the pivot or connecting pin (60) or the like can be fitted into each annular lip (40), the axially outward end face (56) of the bearing bush being flush with the outside surface of the side wall (36, 38), the outside periphery (54) of the bearing bush, adjacent said end face, being of a configuration corresponding to the contour of the funnel-like reduction portion (44) and the bearing bush having, adjacent its inner end face, a cylindrical portion (52) which projects inwardly beyond the end face of the lip (40).