The vibrations are caused by spindle curved tooth meshing impact when the gap between work roller bearing block and frame is oversized.

主要振因是当工作辊轴承座与牌坊之间间隙过大时，接轴弧形齿的啮合冲击将激起轧辊横向振动。

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In the process of the silent chain drive used as the timing transmission in motor, the chain always suffers from meshing impact and waving for polygon action.

在发动机正时机构的齿形链传动中，由于存在多边形效应，链条中心线上下波动，链板啮入轮齿时存在啮入冲击。

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