This ring provides radial stabilisation for a fixed bearing position, forming part of the housing assembly rather than the rolling set itself. Outside diameter is 72.0 mm and net mass is 30.54 g, matching FRM72/8 as a bearing housing component sized for direct fit into the corresponding seat. Because it locks the bearing in place radially, it supports arrangements where axial fixing is handled elsewhere and only positional stability is required at this location. Selection depends on matching the 72.0 mm outside diameter to the housing bore, with no additional sealing or lubrication function attributed to this ring itself.