How close of a tolerance is the retainer ring to the bearing race?

The tolerance of the retainer ring to the bearing race typically depends on the specific application and design requirements. Generally, it is essential to ensure a close fit to prevent any axial movement while allowing for thermal expansion and lubrication. Standard tolerances can range from a few micrometers to several hundred micrometers, depending on the precision needed in the assembly. Always refer to the manufacturer's specifications for precise tolerance requirements.