Which term describes mounting tapered bearings by the indirect method?

• A. Direct method
• B. Indirect method
• C. Direct press
• D. Slip fit

Answer: (B)

Mounting tapered bearings by the indirect method means seating the bearing without pressing directly on the race surfaces that will bear load. A tool or sleeve is used to transfer the force to non-critical surfaces (such as a pilot or outer race seating surface) so the races aren’t damaged during installation. This approach protects against brinelling or distortion and helps ensure the bearing sits true and runs with the correct preload. In practice, you might seat the outer race in the housing with a driver that contacts the outer race’s appropriate surface, then mount the inner race on the shaft with a separate driver that presses on the inner race, keeping the rolling elements and race surfaces free from direct impact. Direct pressing, or pressing directly on the races, risks damage; a slip fit describes a loose or no-press fit, which isn’t about how you install the bearing.