... water pump bearings are combined bearings only for auto water pumps. This kind of bearings can bear radial and axial ... With two rows of balls; WIB, BWF, WS, WK, 885000 series, etc. 2) Ball-roller: With one row of balls, one ... row of rollers; WIR, WN, WKH, 665000 series, etc. 2 Material: Mainly the chrome Steel (GCr15) High- ... Widely used in auto, machine,etc Water pump bearing WB series