Whenever a roller chain is applied, shaft positions may be arbitrarily established. Having said that, in principle, follow the illustration proven below. That may be, should the chain is tensioned horizontally, preserve the leading tensioned. Avoid vertical transmission whenever achievable. In an 
inevitable case, area the big sprocket on the bottom irrespective with the course of rotation.
Once the chain layout is undesirable:
?When the top rated is sagging plus the sprocket center distance is quick:
As illustrated below, change the sprocket center distance shaft to remove the sag.
?Once the leading is sagging along with the sprocket center distance is prolonged:
As illustrated under, set up an idler from inside to eradicate the sag.
?When the chain is vertical or inclined:
Eradicate the additional sag by a tensioner. In this case, a tensioner that automatically eliminates the sag gives superior results.
When a pulsating load acts in higher pace operation:
The chain’s vibration as well as the load influence frequency or chordal action may well synchronize to amplify vibration on the chain. Considering the fact that vibration influences the chain, take countermeasures to stop vibration from the following measures:
?Alter the chain pace.
?Enhance chain stress. Nevertheless, note that over-
tensioning can shorten the existence from the chain. ?Use an idler or tensioner to divide the span
?Install a manual stopper to avoid vibration.
Note: Chordal action refers to your vertical motion of chain caused when it really is engaged with sprockets.
