When a roller chain is utilized, shaft positions is often arbitrarily established. Having said that, in principle, observe the illustration shown under. That is certainly, if your chain is tensioned horizontally, preserve the prime tensioned. Keep away from vertical transmission when probable. In an inevitable case, area the huge sprocket on the bottom regardless from the course of rotation.
Once the chain layout is undesirable:
?When the top rated is sagging as well as sprocket center distance is short:
As illustrated beneath, change the sprocket center distance shaft to eliminate the sag.
?Once the prime is sagging and the sprocket center distance is lengthy:
As illustrated beneath, install an idler from within to reduce the sag.
?Once the chain is vertical or inclined:
Do away with the extra sag by a tensioner. In this instance, a tensioner that automatically eliminates the sag offers much better outcomes.
Whenever a pulsating load acts in high pace operation:
The chain’s vibration as well as the load influence frequency or chordal action may possibly synchronize to amplify vibration over the chain. Since vibration influences the chain, take countermeasures to stop vibration during the following measures:
?Transform the chain pace.
?Boost chain tension. Nonetheless, note that over-
tensioning can shorten the existence with the chain. ?Use an idler or tensioner to divide the span
?Set up a guide stopper to prevent vibration.
Note: Chordal action refers towards the vertical motion of chain 
brought on when it can be engaged with sprockets.