1. The tightness of the sprocket wheel should be appropriate. If it is too tight, it will increase the power consumption, and the bearing is easy to wear; if it is too loose, the sprocket wheel is easy to jump and fall off the chain. The tightness of the sprocket wheel is: lift or press from the middle of the sprocket wheel, about 2% - 3% of the center distance of the two sprocket wheels.

2. The sprocket wheel shall be installed on the shaft without swing and skew. In the same transmission component, the end faces of two sprocket wheels should be in the same plane. When the center distance of the sprocket wheel is less than 0.5m, the deviation can be 1mm; when the center distance of the sprocket wheel is more than 0.5m, the deviation can be 2mm. However, it is not allowed to have friction on the side of the sprocket wheel. If the deviation of two wheels is too large, it is easy to cause chain disconnection and accelerated wear. Pay attention to check and adjust the offset when replacing the sprocket wheel.

3. After the sprocket wheel is seriously worn, replace the new sprocket wheel and the new sprocket wheel at the same time to ensure good engagement. You cannot replace a new sprocket wheel or a new sprocket wheel alone. Otherwise, it will cause poor engagement and accelerate the wear of new sprocket wheel or new sprocket wheel. When the tooth surface of sprocket wheel is worn to a certain extent, it shall be turned over in time (refers to the sprocket used for adjustable surface) to extend the service time.

4. The new sprocket is too long or elongated after use, which is difficult to adjust. The chain link can be removed according to the situation, but it must be an even number. The chain link shall pass through the back of the socket, the locking piece shall be inserted outside, and the opening of the locking piece shall be in the opposite direction of rotation.