A ball or roller bearing has an interference fit with the housing in which it is being installed with a hydraulic or arbor press. Upon what surface should the sleeve of the press be applied?

Correct Answer: Option D — the outer race

For bearings with an interference fit in a housing, the installation force must be applied exclusively to the outer race. Applying force to the inner race would force the load through the rolling elements, leading to internal damage. Proper alignment and uniform pressure distribution are critical to preventing premature bearing failure.