Whenever a roller chain is utilised, shaft positions is usually arbitrarily determined. However, in principle, observe the illustration shown under. That is certainly, when the chain is tensioned horizontally, continue to keep the major tensioned. Stay away from vertical transmission when probable. In an inevitable case, location the significant sprocket at the bottom irrespective on the direction of rotation.
Once the chain layout is undesirable:
?Once the top is sagging plus the sprocket center distance is short:
As illustrated under, change the sprocket center distance shaft to eradicate the sag.
?Once the top is sagging as well as sprocket center distance is lengthy:
As illustrated below, set up an idler from inside to remove the sag.
?When the chain is vertical or inclined:
Eradicate the additional sag by a tensioner. In this instance, a tensioner that automatically eliminates the sag provides far better benefits.
When a pulsating load acts in substantial pace operation:
The chain's vibration along with the load impact frequency or chordal action may possibly synchronize to amplify vibration about the chain. Due to the fact vibration influences the chain, take countermeasures to stop vibration inside the following measures:
?Alter the chain pace.
?Maximize chain tension. However, note that over-
tensioning can shorten the existence of 
your chain. ?Use an idler or tensioner to divide the span
?Set up a guide stopper to stop vibration.
Note: Chordal action refers for the vertical motion of chain induced when it is engaged with sprockets.
