Ball bearings: purpose of the cage (retainer) Identify the primary function served by the cage in a ball bearing. Choose the correct option.
Mechanical Engineering
Machine Design
Difficulty: Easy
Choose an option
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ATo reduce rolling friction
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BTo facilitate slipping of balls
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CTo prevent lubricant from flowing out
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DTo maintain the balls at a fixed distance apart
Answer
Correct Answer: To maintain the balls at a fixed distance apart
Explanation
ConceptThe cage (retainer) keeps the balls evenly spaced, preventing contact between adjacent rolling elements, guiding ball paths, and permitting uniform load distribution. It is not a seal (lubricant retention is by shields/seals) and does not exist to promote slip.
Final AnswerTo maintain the balls at a fixed distance apart