... bearings only for auto water pumps. This kind of bearings can bear radial and axial loadings at ... -quality material and advanced technology, 1 The range of products: WB double-row ball water pump spindle ... , etc. 2) Ball-roller: With one row of balls, one row of rollers; WIR, WN, WKH, 665000 series, etc. 2 ... steel, the hardness reaches 58-62HBC, the hardness of ball and roller reaches 61-65 HRC, and the ...