Ketten- und Ritzelverschleiß: Unterschied zwischen den Versionen

The American Chain Association manual (1972 edition) includes the image below, showing engagement of a new and worn chain with a new sprocket. The worn chain, at the right, is shown with links of unequal length. That actually occurs, because the distance between pins with inner side plates increases due to wear, while that of links with outer side plates -- those which hold the pins -- does not. Uneven roller wear, however, compensates for this in part. Uneven sprocket-tooth wear also does, if the same teeth are always engaged by inner or outer plates. The image at the right is, however, unrealistic in showing chain wear without sprocket wear. It would be unusual to install a worn chain on a new sprocket. The sprocket shown has an odd number of teeth, such that the teeth cannot wear in to accommodate the unequal length of the links.

Many reference works indicate that tension on the chain decreases in a proportional sequence from one link to the next, back from the pulling run of chain, all the way around to where the chain comes onto the sprocket. That analysis takes no account of the need for the pull on the sprocket to be in the same direction as the chain, or of the different angles at which the chain's rollers bear on the sprocket.