Whenever a roller chain is utilised, shaft positions can be arbitrarily established. Having said that, in principle, observe the illustration proven under. That’s, in case the chain is tensioned horizontally, continue to keep the top rated tensioned. Stay clear of vertical transmission anytime feasible. In an inevitable situation, area the massive sprocket with the bottom regardless from the course of rotation.
Once the chain layout is undesirable:
?Once the top rated is sagging plus the sprocket center distance is quick:
As illustrated below, modify the sprocket center distance shaft to remove the sag.
?When the best is sagging as well as the sprocket center distance is 
extended:
As illustrated under, set up an idler from within to eliminate the sag.
?When the chain is vertical or inclined:
Get rid of the additional sag by a tensioner. In this instance, a tensioner that immediately eliminates the sag gives greater effects.
Whenever a pulsating load acts in substantial pace operation:
The chain’s vibration plus the load influence frequency or chordal action might synchronize to amplify vibration to the chain. Considering the fact that vibration affects the chain, get countermeasures to prevent vibration from the following measures:
?Alter the chain pace.
?Increase chain stress. On the other hand, note that over-
tensioning can shorten the existence of the chain. ?Use an idler or tensioner to divide the span
?Set up a guide stopper to avoid vibration.
Note: Chordal action refers to the vertical motion of chain caused when it’s engaged with sprockets.