A ball or roller bearing has an interference fit with the shaft upon 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 B — the inner race

When installing a bearing with an interference fit on a shaft, force must be applied only to the inner race. Applying force to the outer race would transmit the load through the rolling elements, causing brinelling or permanent damage to the bearing raceways, violating standard mechanical installation procedures for antifriction bearings.