Whenever a roller chain is made use of, shaft positions could be arbitrarily determined. Even so, in principle, follow the illustration proven below. That is certainly, when the chain is tensioned horizontally, maintain the top rated tensioned. Stay clear of vertical transmission each time feasible. In an inevitable case, place the large sprocket at the bottom irrespective with the course of rotation.
Once the chain layout is undesirable:
?When the top rated is sagging and the sprocket center distance is short:
As 
illustrated below, adjust the sprocket center distance shaft to remove the sag.
?When the top rated is sagging as well as the sprocket center distance is lengthy:
As illustrated below, install an idler from inside to eliminate the sag.
?When the chain is vertical or inclined:
Remove the extra sag by a tensioner. In this case, a tensioner that instantly eliminates the sag offers much better effects.
Whenever a pulsating load acts in high velocity operation:
The chain’s vibration and the load affect frequency or chordal action may perhaps synchronize to amplify vibration within the chain. Because vibration affects the chain, take countermeasures to stop vibration inside the following measures:
?Transform the chain speed.
?Raise chain stress. On the other hand, note that over-
tensioning can shorten the daily life of the chain. ?Use an idler or tensioner to divide the span
?Install a guidebook stopper to avoid vibration.
Note: Chordal action refers to your vertical motion of chain caused when it truly is engaged with sprockets.
