Split plummer blocks may soon be deemed obsolescent. For the most part, the light series with self-aligning ball bearing have already been replaced by maintenance-free and ready-to-mount housing bearings. What remain are complicated split plummer blocks, which consist of a large number of components and are popularly offered on the market as type SNH, SNL, SNV, etc. They consist of a bearing (usually a spherical roller bearing), an adapter sleeve, a set of seals, and locating ring. All components have to be installed individually and then lubricated. In addition, their installation, especially the tightening of the adapter sleeves, is very error-prone.
But there’s a much simpler way: The ready-to-mount spherical roller bearing units, also known as the SRU (spherical roller unit), are an innovative replacement for split plummer blocks.