In the DVD disc manufacturing process, the equipment of dye coating called Spin Coater functions with rotation.Due to the unbalanced rotation, the bearing of Spin Coater will be fatigued.

• 光碟涂布机以旋转的方式运作，其轴承会因为加工公差或装置定位问题，使得旋转时产生不平衡振动造成轴承疲劳现象。