... , HC2, HC3, SC2, SC3, CSA2, CSB2, and SER2, etc.Different types of bearing housings1. Pillow blocks – these include UCP, HCP, UCLP, UKP ... concave sphered hence the bearing used has a convex sphered outer surface. They are designed to permit moderate initial misplacement. ... HCC, and UKC.This type of bearing housing has a cylindrical outer perimeter hence the bearing outer bore is spherical. The entire ...