Whenever a roller chain is utilised, shaft positions may be arbitrarily determined. Even so, in principle, follow the illustration shown beneath. That is definitely, if the chain is tensioned horizontally, preserve the top tensioned. Stay clear of vertical transmission every time probable. In an inevitable situation, location the significant sprocket in the bottom regardless of the route of rotation.
When the chain layout is undesirable:
?When the leading is sagging along with the sprocket center distance is brief:
As illustrated under, modify the sprocket center distance shaft to reduce the sag.
?Once the prime is sagging as well as sprocket center distance is long:
As illustrated beneath, set up an idler from within to reduce 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 offers improved results.
Whenever a pulsating load acts in higher pace operation:
The chain’s vibration along with 
the load effect frequency or chordal action may well synchronize to amplify vibration around the chain. Because vibration impacts the chain, take countermeasures to prevent vibration within the following measures:
?Modify the chain pace.
?Raise chain stress. However, note that over-
tensioning can shorten the lifestyle of the chain. ?Use an idler or tensioner to divide the span
?Set up a manual stopper to stop vibration.
Note: Chordal action refers to your vertical motion of chain triggered when it is actually engaged with sprockets.
