Whenever a roller chain is utilised, shaft positions may be arbitrarily established. Nevertheless, in principle, adhere to the illustration proven beneath. That is definitely, in the event the chain is tensioned horizontally, hold the top tensioned. Keep away from vertical transmission each time attainable. In an inevitable situation, area the huge sprocket with the bottom regardless of the direction of rotation.
When the chain layout is undesirable:
?Once the major is sagging and also the sprocket center distance is short:
As illustrated below, alter the sprocket center distance shaft to remove the sag.
?When the leading is sagging plus the sprocket center distance 
is long:
As illustrated below, install an idler from inside to reduce the sag.
?When the chain is vertical or inclined:
Eliminate the extra sag by a tensioner. In this case, a tensioner that immediately eliminates the sag offers superior final results.
Whenever a pulsating load acts in large velocity operation:
The chain’s vibration and the load impact frequency or chordal action may perhaps synchronize to amplify vibration within the chain. Due to the fact vibration influences the chain, take countermeasures to avoid vibration during the following measures:
?Alter the chain velocity.
?Maximize chain tension. Nevertheless, note that over-
tensioning can shorten the daily life of the chain. ?Use an idler or tensioner to divide the span
?Set up a manual stopper to prevent vibration.
Note: Chordal action refers towards the vertical movement of chain caused when it really is engaged with sprockets.
