Whenever a roller chain is used, shaft positions might be arbitrarily determined. Having said that, in principle, follow the illustration proven under. That is, when the chain is tensioned horizontally, keep the top rated tensioned. Keep away from vertical transmission each time attainable. In an inevitable situation, location the massive sprocket on the bottom irrespective on the path of rotation.
Once the chain layout is undesirable:
?Once the prime is sagging along with the sprocket center distance is quick:
As illustrated beneath, adjust the sprocket center distance 
shaft to eliminate the sag.
?Once the prime is sagging as well as sprocket center distance is extended:
As illustrated beneath, set up an idler from inside to do away with the sag.
?Once the chain is vertical or inclined:
Eradicate the extra sag by a tensioner. In this instance, a tensioner that automatically eliminates the sag provides improved outcomes.
Whenever a pulsating load acts in higher velocity operation:
The chain’s vibration as well as load effect frequency or chordal action may possibly synchronize to amplify vibration about the chain. Considering the fact that vibration has an effect on the chain, take countermeasures to avoid vibration in the following measures:
?Alter the chain speed.
?Boost chain stress. On the other hand, note that over-
tensioning can shorten the life from the chain. ?Use an idler or tensioner to divide the span
?Install a guidebook stopper to stop vibration.
Note: Chordal action refers to the vertical motion of chain brought about when it is engaged with sprockets.
