牙科高速涡轮手机是口腔临床治疗中重要的也是维修率最高的口腔设备。主要的部件是机头部分的全封闭涡轮轴芯(筒夹),它包括封罩、内部转子和动平衡“O”型圈(以日本NSK高速手机为例)。其中以转子两端的轴承最为重要,它们的损坏直接破坏转子的动平衡,导致手机无法使用。按照国外 Dental high-speed turbine mobile phone is the oral treatment of oral treatment is the most important oral equipment. The main part is the fully enclosed turbine shaft (collet) in the nose section, which includes the enclosure, the internal rotor and the balance “O” ring (for example, Japan’s NSK high-speed handpiece). Among them, the two ends of the rotor bearing the most important, their damage directly undermine the dynamic balance of the rotor, resulting in the phone can not be used. According to foreign countries