When a roller chain is applied, shaft positions might be arbitrarily established. However, in principle, comply with the illustration proven beneath. That is certainly, if the chain is tensioned horizontally, maintain the best tensioned. Avoid vertical transmission anytime probable. In an inevitable case, area the large sprocket with 
the bottom irrespective on the course of rotation.
Once the chain layout is undesirable:
?When the top is sagging and also the sprocket center distance is brief:
As illustrated below, alter the sprocket center distance shaft to reduce the sag.
?Once the leading is sagging and also the sprocket center distance is lengthy:
As illustrated under, set up an idler from inside to eradicate the sag.
?When the chain is vertical or inclined:
Get rid of the additional sag by a tensioner. In this instance, a tensioner that immediately eliminates the sag gives better results.
When a pulsating load acts in high velocity operation:
The chain’s vibration plus the load affect frequency or chordal action could synchronize to amplify vibration over the chain. Considering that vibration has an effect on the chain, take countermeasures to prevent vibration during the following measures:
?Alter the chain velocity.
?Enhance chain tension. However, note that over-
tensioning can shorten the daily life in the chain. ?Use an idler or tensioner to divide the span
?Install a guidebook stopper to prevent vibration.
Note: Chordal action refers for the vertical motion of chain caused when it is actually engaged with sprockets.
Layout of chain position
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