Specific method steps and precautions for chain maintenance

Method steps

1. The sprocket should be installed on the shaft without skew and swing. In the same transmission assembly, the end faces of the two sprockets should be in the same plane. When the center distance of the sprocket is less than 0.5 meters, the allowable deviation is 1 mm; when the center distance of the sprocket is more than 0.5 meters, the allowable deviation is 2. mm. However, it is not allowed to have the phenomenon of friction on the tooth side of the sprocket. If the two wheels are offset too much, it is easy to cause off-chain and accelerated wear. Care must be taken to check and adjust the offset when changing sprockets.
2. The tightness of the chain should be appropriate. If it is too tight, the power consumption will be increased, and the bearing will be easily worn; if the chain is too loose, it will easily jump and come off the chain. The degree of tightness of the chain is: lift or press down from the middle of the chain, and the distance between the centers of the two sprockets is about 2-3cm.
3. The new chain is too long or stretched after use, making it difficult to adjust. You can remove the chain links depending on the situation, but it must be an even number. The chain link should pass through the back of the chain, the locking piece should be inserted outside, and the opening of the locking piece should face the opposite direction of rotation.

4. After the sprocket is severely worn, the new sprocket and chain should be replaced at the same time to ensure good meshing. A new chain or a new sprocket cannot be replaced alone. Otherwise, it will cause poor meshing and accelerate the wear of the new chain or new sprocket. After the tooth surface of the sprocket is worn to a certain extent, it should be turned over and used in time (referring to the sprocket used on the adjustable surface). to prolong the use time.
5. The old chain cannot be mixed with some new chains, otherwise it is easy to produce impact in the transmission and break the chain.
6. The chain should be filled with lubricating oil in time during work. Lubricating oil must enter the matching gap between the roller and the inner sleeve to improve working conditions and reduce wear.
7. When the machine is stored for a long time, the chain should be removed and cleaned with kerosene or diesel oil, and then coated with engine oil or butter and stored in a dry place to prevent corrosion.


For cars with a rear derailleur, set the chain to the state of the smallest wheel pair and the smallest wheel before driving the chain, so that the chain is relatively loose and easy to operate, and it is not easy to “bounce” after it is cut off.
After the chain is cleaned and refueled, slowly turn the crankset upside down. The chain links coming out of the rear derailleur should be able to be straightened. If some chain links still maintain a certain angle, it means that its movement is not smooth, which is a dead knot and should be fixed. Adjustment. If any damaged links are found, they must be replaced in time. To maintain the chain, it is recommended to strictly distinguish between the three types of pins and use connecting pins.

Pay attention to the straightness when using the chain cutter, so that it is not easy to distort the thimble. Careful use of tools can not only protect the tools, but also achieve good results. Otherwise, the tools are easily damaged, and the damaged tools are more likely to damage the parts. It is a vicious circle.


Post time: Apr-14-2023