| 摘要 |
PROBLEM TO BE SOLVED: To provide a water pump not requiring careful work and stringent quality control of pressing-in during a water pump assembly process and retaining high load capacity by adopting a low cost ball on an end side row even if heavy load acts on the end side row. SOLUTION: This water pump bearing includes a flange for pulley attachment on a vehicle end side extension part of a rotary shaft and an inner ring element provided with an outer circumference race of a end side of an outer ring with facing an inner circumference race of the end side is fixed to form the rotary shaft. Diameters of the inner circumference race, the outer circumference race and balls of the end side are larger than diameters of the inner circumference race, the outer circumference race and balls of a rear end side. COPYRIGHT: (C)2006,JPO&NCIPI
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