B20L self aligning bushing Fits RBCOne New Aftermarket Replacement B20L Self Aligning Spherical Plain Bushing for RBC Bearings Applications This aftermarket replacement for the RBC Bearings B20L is a radial unsealed spherical plain bearing (self aligning bushing) from the B L Series. It supports high oscillating radial loads, moderate axial loads in two directions, and accommodates angular misalignment of the shaft. The open (unsealed) design includes lubrication holes and grooves in