1. Product Overview NUP310-E-XL-M1 is single row cylindrical roller bearing with metric dimension 50×110×27mm. NUP structure features double ribs on outer ring, one fixed rib plus one loose rib on inner ring, capable of bidirectional axial positioning for shafts. E stands for optimized logarithmic crowned rollers to reduce edge stress; XL represents upgraded extended load design; M1 refers to solid machined brass cage with stable roller guidance. Separable inner and outer