Whenever a roller chain is applied, shaft positions may be arbitrarily determined. Having said that, in principle, follow the illustration shown under. That’s, if your chain is tensioned horizontally, maintain the prime tensioned. Avoid vertical transmission every time doable. In an inevitable situation, place the substantial sprocket at the bottom irrespective of the direction of rotation.
When the chain layout is undesirable:
?When the prime is sagging as well as sprocket center distance is short:
As illustrated below, modify the sprocket center distance shaft to do away with the sag.
?Once the leading is sagging and also the sprocket center distance is prolonged:
As illustrated under, install an idler from within to get rid of the sag.
?Once the chain is vertical or inclined:
Do away with the additional sag by a tensioner. In this instance, a tensioner that instantly eliminates the 
sag provides superior success.
When a pulsating load acts in large velocity operation:
The chain’s vibration as well as load affect frequency or chordal action may perhaps synchronize to amplify vibration to the chain. Because vibration influences the chain, take countermeasures to prevent vibration during the following measures:
?Adjust the chain speed.
?Maximize chain stress. However, note that over-
tensioning can shorten the life of your chain. ?Use an idler or tensioner to divide the span
?Set up a manual stopper to stop vibration.
Note: Chordal action refers to the vertical motion of chain triggered when it is engaged with sprockets.
Layout of chain position
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