... ball water pump spindle bearings WR simple-row ball and simple roller water pump spindle bearings WB-C double-row ball water pump spindle( ... water pump apindle bearings(four-point angular contact) 1) Ball-ball: With two rows of balls; WIB, BWF, WS, WK, 885000 series ... hardness of outer ring is 60-64HRC Application of water pump bearings: Widely used in auto, machine,etc Water pump bearing WB series