Bearing device used for transmission in automobiles

摘要

In a bearing device, a gear shaft is supported relative to a transmission case via tapered roller bearings. The transmission case is formed of a material having a larger linear expansion coefficient than the gear shaft. A contact angle of tapered rollers relative to outer rings of the tapered roller bearings is set to be from not less than 8 DEG to not more than 13.5 DEG .