Due to low installation accuracy, loose foot bolts, frame deformation, poor lubrication, etc., the gears of the gear coupling wear abnormally, causing vibration and increased transmission noise in the gear coupling, affecting the normal operation of the mechanism.

2. Joints may vibrate or bolts may be sheared off upon operation due to loose coupling bolts and keys, or damaged elastic pins and holes. This can lead to mechanical failure.

3. Poor material or overloading can cause the coupling to crack.

4. Couplings with lubrication devices leak oil or the lubricating oil degrades due to damaged oil seals.