During regular visual inspections special attention should be paid to stretching due to wear,
tension, lubrication condition, and evidence of wear due to tracking errors. Checking the maximum permissible
stretching due to wear:The length of a chain is defined by the pitch p and the number of links X. In the course of time stretching due to wear occurs, and usually this can be measured without removing the chain. The difference from precise measurement with a specified measurement load is slight if measurements are conducted over the highest possible number of chain links,approximately 20 to 40.