The tightness of g80 lifting chain shall be appropriate, too tight increases power consumption, and the bearing is easy to wear; too loose chain is easy to jump and fall off. The tightness of the chain is: lift or press from the middle of the chain, and the center distance between two sprocket wheels is about 2% - 3%. The sprocket wheel shall be installed on the shaft without skew and swing. The end faces of two sprocket wheels in the same transmission component shall be in the same plane. When the center distance of the sprocket wheel is less than 0.5m, the allowable deviation is 1mm; when the center distance of the sprocket wheel is more than 0.5m, the allowable deviation is 2mm. But friction chains are not allowed. When the sprocket wheel is seriously worn, the new sprocket wheel and new chain shall be replaced at the same time to ensure good engagement.

It is not allowed to replace the new chain or sprocket wheel alone. Otherwise, it will cause poor engagement and accelerate the wear of new chain or new sprocket wheel. When the tooth surface of sprocket wheel is worn to a certain extent, it shall be turned over for use in time (it refers to the sprocket wheel used for adjustable surface). To extend the use time. The new lifting chain 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 chain, the locking piece shall be inserted outside, and the opening of the locking piece shall face the opposite direction of rotation. During the operation of g80 lifting chain, please remember to fill lubricating oil in time. The lubricating oil must enter into the fitting clearance between the roller and the inner sleeve in order to improve the working conditions and reduce the wear. The old lifting chain cannot be mixed with some new chains, otherwise it is easy to have impact in the transmission and pull the chain off. The scrapping standard of g80 level lifting chain is mainly judged from the following two aspects.

1、 The allowable wear value of the chain shall not exceed 10% of the rod diameter of the ring chain or the thickness of the accessories. 2、 From the plane where the main ring is not bent, the main ring shall be scrapped if it is twisted more than 10 degrees.