In an anti-friction bearing, which feature primarily keeps the rollers in place and allows rotation?

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Multiple Choice

In an anti-friction bearing, which feature primarily keeps the rollers in place and allows rotation?

Explanation:
The feature that keeps the rollers in place while allowing rotation is the bearing cage (retainer). The cage spaces the rolling elements evenly and guides them so they don’t collide or bunch up as the bearing turns. This arrangement lets each roller spin around its own axis while the inner and outer races carry the load, producing smooth, low-friction rotation. Seals are for keeping contaminants out and lubricant in, lubricant retention is about lubrication itself, and axial-load support comes mainly from the races and housing, not from the cage.

The feature that keeps the rollers in place while allowing rotation is the bearing cage (retainer). The cage spaces the rolling elements evenly and guides them so they don’t collide or bunch up as the bearing turns. This arrangement lets each roller spin around its own axis while the inner and outer races carry the load, producing smooth, low-friction rotation. Seals are for keeping contaminants out and lubricant in, lubricant retention is about lubrication itself, and axial-load support comes mainly from the races and housing, not from the cage.

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