时间：2013-11-20 10:36　作者：admin　点击： 次

In the process of daily use, the coupling often has the following four failures:
1. The tooth surface of the coupling is severely damaged.
2. The axial displacement of the gear ring of the coupling is large, and it can't even mesh.
3. The coupling has broken teeth.
4. The bolts on the coupling are broken.