Chain drives - speed fluctuation 1

[TerryB]

I would like to replace an existing belt drive with a chain and sprocket arrangement. Would like to know what fluctuation in rotational speed I might get on driven shaft and how to calulate. Can anybody help with a formula for this 'polygonal effect'.

Thanks
Terry

 

[butelja]

This is known as "chordal action". For an explanation, see any standard machine design textbook, or the following link:

http://www.ustsubaki.com/section2.html#0014

. I hope it is helpful.