FR8ZZ Flanged Shielded Bearing 1/2" x 1 1/8" x 5/16" inch FR8ZZ Flanged Ball Bearing, bearing is Electric motor quality, FR8ZZ is a popular size that could be used in many application that uses this size 1/2" x 1 1/8" x 5/16" inch, each FR8ZZ bearing is closed with 2 Metal Shields, one Shield from each side to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease.