Patent ID: 7175350

Claim:
A machine comprising: a housing having first and second bearing seats, with each seat being defined by a bore and a shoulder at the end of the bore, the bores being aligned along an axis and opening away from each other and at least one of the shoulders being beveled in that it is obique to the axis; a shaft extended through the bearing seats in the housing and being formed from a material having a lower coefficient of thermal expansion than the coefficient of thermal expansion for the material from which the housing is formed; and first and second antifriction bearings located between the housing and shaft for enabling relative rotation to occur between the shaft and the housing, the first bearing being at the first bearing seat and the second bearing being at the second bearing seat, each bearing including an outer race in the bearing seat for the bearing of which it is a part, the outer race having a raceway that is presented toward the axis and is inclined with respect to the axis and also having a back face that is against and conforms to the shoulder of the seat, each bearing also having an inner raceway carried by the shaft and presented outwardly away from the axis and toward the raceway of the outer race, the inner race being inclined with respect to the axis in the same direction as the raceway of the outer race, each bearing further including rolling elements arranged in a row between the raceway of its outer race and its inner raceway, the raceways of the first and second bearings being inclined downwardly toward each other, so that the bearings are mounted in opposition, the outer races being fixed in position with respect to the housing, the inner raceways being fixed in position with respect to the shaft.