1) UC,UB,UD,UK,UEL,SA,SB,SER,UCX series 2) Metric and imperial ... in combination with any light duty housing.Though it is small size,it has as high load bearing capacity as that ... type ball bearing is assembled into various housing and it has an eccentric collor on the outsideof the inner ... place where the shaft diameter precision is uneven,since it is provided with the complete dust-proof mechanism,the ...