The reducer is not like household appliances or some standard products that rarely have problems. On the contrary, it often has many issues. Some even break down before they have been used for a few times. There are many reasons for this. Let me mention a few: 

Due to the harsh operating environment of the reducer, various faults such as wear and leakage often occur. The main types include: 

The bearing chambers of the reducer have been worn out, including the wear of the housing bearing chamber, the inner hole bearing chamber of the box, and the bearing chamber of the gearbox. 

2. The shaft diameter of the reducer gear shaft has worn out. The main worn areas are at the shaft head and key slots. 

3. Wear on the bearing positions of the transmission shaft of the reducer; 

4. Leakage at the joint surface of the reducer; 

5. The vent cap was not replaced. This is something that the manufacturer, especially, strongly dislikes.

Regarding the wear problem, the traditional solutions are welding repair or electroplating followed by machining for restoration. However, both of these methods have certain drawbacks: The thermal stress generated by high temperature during welding cannot be completely eliminated, which can cause material damage and lead to bending or fracture of the component; while electroplating is limited by the coating thickness and is prone to peeling off. Moreover, both of these methods are using metal to repair metal, which cannot change the "hard-on-hard" mating relationship. Under the combined effect of various forces, it will still cause further wear. For some large bearing enterprises, this problem cannot be solved on-site and they often rely on external repair services.

Contemporary Western countries mostly use high polymer composite materials for repair. These materials have strong adhesion, excellent compressive strength and other comprehensive properties. Using high polymer materials for repair can avoid disassembly and machining, without the influence of welding heat stress, and the repair thickness is not limited. At the same time, the products have the flexibility that metal materials do not have, which can absorb the impact and vibration of the equipment, avoid the possibility of further wear, and greatly extend the service life of equipment components, saving a lot of downtime for enterprises and creating huge economic value. 

Regarding the leakage issue, the traditional methods require disassembling and opening the reducer, replacing the sealing gasket or applying sealant. This process is time-consuming and labor-intensive, and it is difficult to ensure a perfect seal. Moreover, leakage may occur again during operation. High molecular materials can directly address the leakage problem on-site. The materials possess excellent adhesion, oil resistance, and a 350% tensile strength, which overcome the impact caused by the vibration of the reducer, effectively solving the leakage problem of the reducer for the enterprise. 

Due to the wide variety of types, specifications and parameters of reducers, many industry experts are unable to clearly understand how to make the correct selection. Therefore, problems in the selection of reducers by the users, which lead to damage of the reducers or a very short service life, are quite common. Another very important issue is that some equipment manufacturers and users now choose a smaller model or two specifications of reducers to reduce costs. When the reducer model is smaller, the price goes down as well, which is also a major reason why reducers often have problems.