1. Product Overview 23491/23420 is standard imperial single row tapered roller bearing. It consists of separable inner cone (23491) and outer cup (23420). It can withstand combined radial load and unidirectional axial thrust. Normally installed in opposed paired arrangement to bear bidirectional axial forces. Separable structure facilitates assembly, disassembly, inspection and periodic re-lubrication. Widely used for agricultural tractors, medium-duty truck hubs, harvesting