... , CSA2, CSB2, and SER2, etc.Different types of bearing housings1. Pillow blocks – these include UCP, HCP, UCLP, UKP, UCPX, and UKPX ... UKT. These bearing housings have an inner surface which is concave sphered hence the bearing used has a convex sphered outer ... . Light duty types - SAFD, SBFD, SAFW, SBFW, SALF, and SBLF. Pillow block bell bearings UK328