Whenever a roller chain is utilised, shaft positions is usually arbitrarily established. Having said that, in principle, observe the illustration shown beneath. Which is, if the chain is tensioned horizontally, retain the major tensioned. Steer clear of vertical transmission each time probable. In an inevitable case, place the substantial sprocket at the bottom regardless on the direction of rotation.
When the chain layout is undesirable:
?When the major is sagging as well as the sprocket center distance is quick:
As illustrated beneath, change the sprocket center distance shaft to get rid of the sag.
?Once the major is sagging as well as sprocket center distance is long:
As illustrated under, install an idler from inside to get rid of the sag.
?When the chain is vertical or inclined:
Get rid of the extra sag by a tensioner. In this instance, a tensioner that automatically eliminates the sag gives much better final results.
Whenever a pulsating load acts in substantial pace operation:
The chain’s vibration as well as the load impact frequency or chordal action may synchronize to amplify vibration about the 
chain. Due to the fact vibration impacts the chain, take countermeasures to avoid vibration in the following measures:
?Transform the chain speed.
?Raise chain stress. However, note that over-
tensioning can shorten the lifestyle of your chain. ?Use an idler or tensioner to divide the span
?Set up a guide stopper to avoid vibration.
Note: Chordal action refers to the vertical movement of chain brought on when it is actually engaged with sprockets.
