Last Updated
：2025/11/20
planetary gear
Noun
Japanese Meaning
中央に太陽歯車を持ち、その周りを複数の惑星歯車が回転する歯車のシステム。通常、外側にリングギア（外歯車）が配置される。
（ plural ）
Quizzes for review
A system of gears that has a central gear wheel (sun gear) around which others (planet gears) rotate, often within an outer ring.
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planetary gear
Before the test run, the engineer carefully examined the planetary gear to make sure the sun gear and planet gears were properly aligned within the ring.
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Before the test run, the engineer carefully examined the planetary gear to make sure the sun gear and planet gears were properly aligned within the ring.
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