In a roller chain drive an impulsive load occurs each time a roller is picked up by the driving sprocket from the chain span. These impulsive loads cause high frequency sprocket angular accelerations of large amplitude, and are the source of high frequency chain noise.
Measurements of sprocket acceleration immediately after impact have been made to demonstrate the effects of different methods of lubrication on the magnitude of the impulse. Oil drip, oil jet and oil bath lubrication have been investigated for normal machine oil and very high viscosity oil. The results show considerable variations in acceleration amplitude.
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