Whenever a roller chain is used, shaft positions is usually arbitrarily established. However, in principle, adhere to the illustration proven below. That is definitely, if the chain is tensioned horizontally, preserve the best tensioned. Stay clear of vertical transmission when attainable. In an inevitable situation, place the big sprocket at the bottom irrespective with the course of rotation.
Once the chain layout is undesirable:
?Once the best is sagging as well as the sprocket center distance is brief:
As illustrated below, modify the sprocket center distance shaft to eradicate the sag.
?Once the top rated is sagging as well as sprocket center distance is extended:
As illustrated below, install an idler from inside to eliminate the sag.
?Once the chain is vertical or inclined:
Do away with the extra sag by a tensioner. In this instance, a tensioner that instantly eliminates the sag gives improved benefits.
Whenever a pulsating load acts in higher pace operation:
The chain’s vibration as well as load impact frequency or chordal action might synchronize to amplify vibration over the chain. Because vibration has an effect on the chain, take countermeasures to stop vibration in the following measures:
?Adjust the chain velocity.
?Raise chain tension. On the other hand, note that over-
tensioning can shorten the life of your chain. ?Use an 
idler or tensioner to divide the span
?Install a guide stopper to prevent vibration.
Note: Chordal action refers towards the vertical movement of chain brought about when it is engaged with sprockets.
