1. Product Overview UCFC217 is heavy-duty four-hole round flange mounted bearing unit, assembled by FC217 cast iron round flange housing and UC217 spherical outer insert bearing, standard matching shaft diameter 85mm. Model Code Explanation: UC: Insert deep groove ball bearing with spherical outer surface, widened extended inner ring with double set screw locking FC: Round four-bolt flange cast iron housing, convenient for vertical wall and equipment panel installation 217: