... is a bearing unit which combines rolling bearing with the bearing block. ... Series (light series), UC300 series (heavy series), and distortion product UB, (SB) 200 Series, UK200 series, UK300 series. UEL200 family, UEL300, series, SA200 series ... different environment, the ball bearing for units made with POM, HDPE,PP, UPE, PTFE ... -lip seal.Type of Ball BearingsSet Screw type, Eccentric Locking Collar Type, ...