o ring 3 in this case the runner 1 tilts leading to undesirable bearing of surfaces on sharp edges which generates stresses resulting in premature deterioration of the surfaces in sliding contact to avoid this the runner 1 may be supported by at least three u201c pads u201d 17 the resultant of the load pressing the runner onto the track then falling inside the resulting support polygon fig1 fig1 shows a guiding member according to the invention in a shaft bearing configuration which is distinguished from that in fig9 by the fact that there are three rubbing parts the shaft 13 the bearing bushing 14 pierced with holes 9 and the casing 18 in this embodiment there are two functional surfaces on the pierced bushing 14 one consisting of its internal bore and the other its external cylinder fig1 shows an embodiment with two rubbing parts which are the shaft 13 and the bearing bushing 14 pierced with holes 9 a bearing sleeve 19 made of bearing steel of the 100c6 type has been shrunk fit onto it the bushing 14 is an interference fit in a bore of the casing 18 fig1 is a variant of fig1 with a u201c floating u201d pierced bearing bushing which rubs on.