Steel balls for ball bearings are generally made of ______________ steel?
Correct answer: D. Carbon chrome
- A. Cast
- B. Stainless
- C. Free carbon
- D. Carbon chrome
Explanation
Ball-bearing races and balls are commonly made from hard carbon-chromium steel, which provides high hardness, wear resistance, and fatigue strength. Stainless steel is used for special corrosive environments rather than as the general choice.
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