Bearing inserts have a spherical outer diameter. They are designed around the internal geometry of a single-row deep groove ball bearing, series 62 and 63. 
The housing has a matching spherical shaped seat in which the bearing insert sits, making it easy for them to be assembled together. NTN-SNR offers sealed, lubricated for life, bearing inserts for easy maintenance.

The self-aligning ability, in all directions, of the bearing inserts can compensate for any slight static mis-alignment of the shaft.  The various fixing methods on the extended inner ring provide very simple mounting on to the shaft. 

Self-aligning bearing units are designed to be used in a wide range of applications and machines in the industrial market. The choice depends on the use, the installation and the operating conditions to which they are subjected: speed, accuracy, cost effectiveness，type and level of load, service temperature range，installation, levels of cleanliness，noise requirements, environmental pollution, degree of sealing，anti-corrosion protection, compliance with standards ，frequency of maintenance，presence of condition monitoring system