When a roller chain is applied, shaft positions could be arbitrarily determined. Having said that, in principle, comply with the illustration shown under. That is definitely, if the chain is tensioned horizontally, maintain the major tensioned. Stay clear of 
vertical transmission each time achievable. In an inevitable situation, location the massive sprocket with the bottom irrespective of your route of rotation.
Once the chain layout is undesirable:
?When the major is sagging as well as sprocket center distance is quick:
As illustrated below, adjust the sprocket center distance shaft to eradicate the sag.
?Once the best is sagging as well as the sprocket center distance is lengthy:
As illustrated beneath, set up an idler from within to eradicate the sag.
?When the chain is vertical or inclined:
Remove the additional sag by a tensioner. In this instance, a tensioner that automatically eliminates the sag provides improved outcomes.
Whenever a pulsating load acts in large pace operation:
The chain’s vibration as well as load impact frequency or chordal action may synchronize to amplify vibration on the chain. Because vibration has an effect on the chain, get countermeasures to avoid vibration while in the following measures:
?Adjust the chain velocity.
?Increase chain tension. Nevertheless, note that over-
tensioning can shorten the life on the chain. ?Use an idler or tensioner to divide the span
?Set up a manual stopper to stop vibration.
Note: Chordal action refers to the vertical motion of chain triggered when it is actually engaged with sprockets.
Layout of chain position
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